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788 lines
28 KiB
788 lines
28 KiB
import inspect
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import io
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import itertools
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import os
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import sys
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import typing as t
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from gettext import gettext as _
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from ._compat import isatty
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from ._compat import strip_ansi
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from ._compat import WIN
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from .exceptions import Abort
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from .exceptions import UsageError
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from .globals import resolve_color_default
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from .types import Choice
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from .types import convert_type
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from .types import ParamType
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from .utils import echo
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from .utils import LazyFile
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if t.TYPE_CHECKING:
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from ._termui_impl import ProgressBar
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V = t.TypeVar("V")
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# The prompt functions to use. The doc tools currently override these
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# functions to customize how they work.
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visible_prompt_func: t.Callable[[str], str] = input
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_ansi_colors = {
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"black": 30,
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"red": 31,
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"green": 32,
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"yellow": 33,
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"blue": 34,
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"magenta": 35,
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"cyan": 36,
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"white": 37,
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"reset": 39,
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"bright_black": 90,
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"bright_red": 91,
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"bright_green": 92,
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"bright_yellow": 93,
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"bright_blue": 94,
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"bright_magenta": 95,
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"bright_cyan": 96,
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"bright_white": 97,
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}
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_ansi_reset_all = "\033[0m"
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def hidden_prompt_func(prompt: str) -> str:
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import getpass
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return getpass.getpass(prompt)
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def _build_prompt(
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text: str,
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suffix: str,
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show_default: bool = False,
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default: t.Optional[t.Any] = None,
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show_choices: bool = True,
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type: t.Optional[ParamType] = None,
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) -> str:
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prompt = text
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if type is not None and show_choices and isinstance(type, Choice):
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prompt += f" ({', '.join(map(str, type.choices))})"
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if default is not None and show_default:
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prompt = f"{prompt} [{_format_default(default)}]"
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return f"{prompt}{suffix}"
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def _format_default(default: t.Any) -> t.Any:
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if isinstance(default, (io.IOBase, LazyFile)) and hasattr(default, "name"):
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return default.name # type: ignore
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return default
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def prompt(
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text: str,
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default: t.Optional[t.Any] = None,
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hide_input: bool = False,
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confirmation_prompt: t.Union[bool, str] = False,
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type: t.Optional[t.Union[ParamType, t.Any]] = None,
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value_proc: t.Optional[t.Callable[[str], t.Any]] = None,
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prompt_suffix: str = ": ",
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show_default: bool = True,
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err: bool = False,
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show_choices: bool = True,
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) -> t.Any:
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"""Prompts a user for input. This is a convenience function that can
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be used to prompt a user for input later.
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If the user aborts the input by sending an interrupt signal, this
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function will catch it and raise a :exc:`Abort` exception.
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:param text: the text to show for the prompt.
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:param default: the default value to use if no input happens. If this
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is not given it will prompt until it's aborted.
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:param hide_input: if this is set to true then the input value will
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be hidden.
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:param confirmation_prompt: Prompt a second time to confirm the
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value. Can be set to a string instead of ``True`` to customize
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the message.
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:param type: the type to use to check the value against.
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:param value_proc: if this parameter is provided it's a function that
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is invoked instead of the type conversion to
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convert a value.
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:param prompt_suffix: a suffix that should be added to the prompt.
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:param show_default: shows or hides the default value in the prompt.
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:param err: if set to true the file defaults to ``stderr`` instead of
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``stdout``, the same as with echo.
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:param show_choices: Show or hide choices if the passed type is a Choice.
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For example if type is a Choice of either day or week,
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show_choices is true and text is "Group by" then the
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prompt will be "Group by (day, week): ".
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.. versionadded:: 8.0
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``confirmation_prompt`` can be a custom string.
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.. versionadded:: 7.0
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Added the ``show_choices`` parameter.
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.. versionadded:: 6.0
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Added unicode support for cmd.exe on Windows.
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.. versionadded:: 4.0
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Added the `err` parameter.
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"""
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def prompt_func(text: str) -> str:
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f = hidden_prompt_func if hide_input else visible_prompt_func
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try:
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# Write the prompt separately so that we get nice
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# coloring through colorama on Windows
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echo(text.rstrip(" "), nl=False, err=err)
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# Echo a space to stdout to work around an issue where
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# readline causes backspace to clear the whole line.
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return f(" ")
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except (KeyboardInterrupt, EOFError):
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# getpass doesn't print a newline if the user aborts input with ^C.
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# Allegedly this behavior is inherited from getpass(3).
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# A doc bug has been filed at https://bugs.python.org/issue24711
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if hide_input:
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echo(None, err=err)
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raise Abort() from None
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if value_proc is None:
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value_proc = convert_type(type, default)
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prompt = _build_prompt(
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text, prompt_suffix, show_default, default, show_choices, type
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)
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if confirmation_prompt:
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if confirmation_prompt is True:
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confirmation_prompt = _("Repeat for confirmation")
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confirmation_prompt = _build_prompt(confirmation_prompt, prompt_suffix)
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while True:
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while True:
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value = prompt_func(prompt)
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if value:
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break
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elif default is not None:
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value = default
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break
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try:
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result = value_proc(value)
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except UsageError as e:
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if hide_input:
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echo(_("Error: The value you entered was invalid."), err=err)
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else:
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echo(_("Error: {e.message}").format(e=e), err=err) # noqa: B306
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continue
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if not confirmation_prompt:
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return result
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while True:
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value2 = prompt_func(confirmation_prompt)
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is_empty = not value and not value2
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if value2 or is_empty:
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break
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if value == value2:
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return result
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echo(_("Error: The two entered values do not match."), err=err)
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def confirm(
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text: str,
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default: t.Optional[bool] = False,
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abort: bool = False,
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prompt_suffix: str = ": ",
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show_default: bool = True,
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err: bool = False,
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) -> bool:
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"""Prompts for confirmation (yes/no question).
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If the user aborts the input by sending a interrupt signal this
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function will catch it and raise a :exc:`Abort` exception.
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:param text: the question to ask.
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:param default: The default value to use when no input is given. If
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``None``, repeat until input is given.
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:param abort: if this is set to `True` a negative answer aborts the
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exception by raising :exc:`Abort`.
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:param prompt_suffix: a suffix that should be added to the prompt.
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:param show_default: shows or hides the default value in the prompt.
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:param err: if set to true the file defaults to ``stderr`` instead of
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``stdout``, the same as with echo.
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.. versionchanged:: 8.0
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Repeat until input is given if ``default`` is ``None``.
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.. versionadded:: 4.0
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Added the ``err`` parameter.
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"""
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prompt = _build_prompt(
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text,
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prompt_suffix,
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show_default,
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"y/n" if default is None else ("Y/n" if default else "y/N"),
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)
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while True:
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try:
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# Write the prompt separately so that we get nice
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# coloring through colorama on Windows
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echo(prompt.rstrip(" "), nl=False, err=err)
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# Echo a space to stdout to work around an issue where
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# readline causes backspace to clear the whole line.
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value = visible_prompt_func(" ").lower().strip()
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except (KeyboardInterrupt, EOFError):
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raise Abort() from None
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if value in ("y", "yes"):
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rv = True
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elif value in ("n", "no"):
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rv = False
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elif default is not None and value == "":
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rv = default
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else:
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echo(_("Error: invalid input"), err=err)
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continue
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break
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if abort and not rv:
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raise Abort()
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return rv
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def echo_via_pager(
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text_or_generator: t.Union[t.Iterable[str], t.Callable[[], t.Iterable[str]], str],
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color: t.Optional[bool] = None,
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) -> None:
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"""This function takes a text and shows it via an environment specific
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pager on stdout.
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.. versionchanged:: 3.0
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Added the `color` flag.
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:param text_or_generator: the text to page, or alternatively, a
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generator emitting the text to page.
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:param color: controls if the pager supports ANSI colors or not. The
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default is autodetection.
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"""
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color = resolve_color_default(color)
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if inspect.isgeneratorfunction(text_or_generator):
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i = t.cast(t.Callable[[], t.Iterable[str]], text_or_generator)()
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elif isinstance(text_or_generator, str):
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i = [text_or_generator]
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else:
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i = iter(t.cast(t.Iterable[str], text_or_generator))
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# convert every element of i to a text type if necessary
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text_generator = (el if isinstance(el, str) else str(el) for el in i)
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from ._termui_impl import pager
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return pager(itertools.chain(text_generator, "\n"), color)
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def progressbar(
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iterable: t.Optional[t.Iterable[V]] = None,
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length: t.Optional[int] = None,
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label: t.Optional[str] = None,
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show_eta: bool = True,
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show_percent: t.Optional[bool] = None,
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show_pos: bool = False,
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item_show_func: t.Optional[t.Callable[[t.Optional[V]], t.Optional[str]]] = None,
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fill_char: str = "#",
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empty_char: str = "-",
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bar_template: str = "%(label)s [%(bar)s] %(info)s",
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info_sep: str = " ",
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width: int = 36,
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file: t.Optional[t.TextIO] = None,
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color: t.Optional[bool] = None,
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update_min_steps: int = 1,
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) -> "ProgressBar[V]":
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"""This function creates an iterable context manager that can be used
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to iterate over something while showing a progress bar. It will
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either iterate over the `iterable` or `length` items (that are counted
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up). While iteration happens, this function will print a rendered
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progress bar to the given `file` (defaults to stdout) and will attempt
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to calculate remaining time and more. By default, this progress bar
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will not be rendered if the file is not a terminal.
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The context manager creates the progress bar. When the context
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manager is entered the progress bar is already created. With every
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iteration over the progress bar, the iterable passed to the bar is
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advanced and the bar is updated. When the context manager exits,
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a newline is printed and the progress bar is finalized on screen.
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Note: The progress bar is currently designed for use cases where the
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total progress can be expected to take at least several seconds.
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Because of this, the ProgressBar class object won't display
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progress that is considered too fast, and progress where the time
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between steps is less than a second.
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No printing must happen or the progress bar will be unintentionally
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destroyed.
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Example usage::
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with progressbar(items) as bar:
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for item in bar:
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do_something_with(item)
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Alternatively, if no iterable is specified, one can manually update the
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progress bar through the `update()` method instead of directly
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iterating over the progress bar. The update method accepts the number
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of steps to increment the bar with::
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with progressbar(length=chunks.total_bytes) as bar:
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for chunk in chunks:
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process_chunk(chunk)
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bar.update(chunks.bytes)
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The ``update()`` method also takes an optional value specifying the
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``current_item`` at the new position. This is useful when used
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together with ``item_show_func`` to customize the output for each
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manual step::
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with click.progressbar(
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length=total_size,
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label='Unzipping archive',
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item_show_func=lambda a: a.filename
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) as bar:
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for archive in zip_file:
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archive.extract()
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bar.update(archive.size, archive)
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:param iterable: an iterable to iterate over. If not provided the length
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is required.
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:param length: the number of items to iterate over. By default the
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progressbar will attempt to ask the iterator about its
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length, which might or might not work. If an iterable is
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also provided this parameter can be used to override the
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length. If an iterable is not provided the progress bar
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will iterate over a range of that length.
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:param label: the label to show next to the progress bar.
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:param show_eta: enables or disables the estimated time display. This is
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automatically disabled if the length cannot be
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determined.
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:param show_percent: enables or disables the percentage display. The
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default is `True` if the iterable has a length or
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`False` if not.
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:param show_pos: enables or disables the absolute position display. The
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default is `False`.
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:param item_show_func: A function called with the current item which
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can return a string to show next to the progress bar. If the
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function returns ``None`` nothing is shown. The current item can
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be ``None``, such as when entering and exiting the bar.
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:param fill_char: the character to use to show the filled part of the
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progress bar.
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:param empty_char: the character to use to show the non-filled part of
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the progress bar.
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:param bar_template: the format string to use as template for the bar.
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The parameters in it are ``label`` for the label,
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``bar`` for the progress bar and ``info`` for the
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info section.
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:param info_sep: the separator between multiple info items (eta etc.)
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:param width: the width of the progress bar in characters, 0 means full
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terminal width
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:param file: The file to write to. If this is not a terminal then
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only the label is printed.
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:param color: controls if the terminal supports ANSI colors or not. The
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default is autodetection. This is only needed if ANSI
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codes are included anywhere in the progress bar output
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which is not the case by default.
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:param update_min_steps: Render only when this many updates have
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completed. This allows tuning for very fast iterators.
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.. versionchanged:: 8.0
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Output is shown even if execution time is less than 0.5 seconds.
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.. versionchanged:: 8.0
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``item_show_func`` shows the current item, not the previous one.
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.. versionchanged:: 8.0
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Labels are echoed if the output is not a TTY. Reverts a change
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in 7.0 that removed all output.
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.. versionadded:: 8.0
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Added the ``update_min_steps`` parameter.
|
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|
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.. versionchanged:: 4.0
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Added the ``color`` parameter. Added the ``update`` method to
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the object.
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.. versionadded:: 2.0
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"""
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from ._termui_impl import ProgressBar
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color = resolve_color_default(color)
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return ProgressBar(
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iterable=iterable,
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length=length,
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show_eta=show_eta,
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show_percent=show_percent,
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show_pos=show_pos,
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item_show_func=item_show_func,
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fill_char=fill_char,
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empty_char=empty_char,
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bar_template=bar_template,
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info_sep=info_sep,
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file=file,
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label=label,
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width=width,
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color=color,
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update_min_steps=update_min_steps,
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)
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|
|
|
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def clear() -> None:
|
|
"""Clears the terminal screen. This will have the effect of clearing
|
|
the whole visible space of the terminal and moving the cursor to the
|
|
top left. This does not do anything if not connected to a terminal.
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|
|
.. versionadded:: 2.0
|
|
"""
|
|
if not isatty(sys.stdout):
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return
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|
if WIN:
|
|
os.system("cls")
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|
else:
|
|
sys.stdout.write("\033[2J\033[1;1H")
|
|
|
|
|
|
def _interpret_color(
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color: t.Union[int, t.Tuple[int, int, int], str], offset: int = 0
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|
) -> str:
|
|
if isinstance(color, int):
|
|
return f"{38 + offset};5;{color:d}"
|
|
|
|
if isinstance(color, (tuple, list)):
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|
r, g, b = color
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return f"{38 + offset};2;{r:d};{g:d};{b:d}"
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|
|
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return str(_ansi_colors[color] + offset)
|
|
|
|
|
|
def style(
|
|
text: t.Any,
|
|
fg: t.Optional[t.Union[int, t.Tuple[int, int, int], str]] = None,
|
|
bg: t.Optional[t.Union[int, t.Tuple[int, int, int], str]] = None,
|
|
bold: t.Optional[bool] = None,
|
|
dim: t.Optional[bool] = None,
|
|
underline: t.Optional[bool] = None,
|
|
overline: t.Optional[bool] = None,
|
|
italic: t.Optional[bool] = None,
|
|
blink: t.Optional[bool] = None,
|
|
reverse: t.Optional[bool] = None,
|
|
strikethrough: t.Optional[bool] = None,
|
|
reset: bool = True,
|
|
) -> str:
|
|
"""Styles a text with ANSI styles and returns the new string. By
|
|
default the styling is self contained which means that at the end
|
|
of the string a reset code is issued. This can be prevented by
|
|
passing ``reset=False``.
|
|
|
|
Examples::
|
|
|
|
click.echo(click.style('Hello World!', fg='green'))
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|
click.echo(click.style('ATTENTION!', blink=True))
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|
click.echo(click.style('Some things', reverse=True, fg='cyan'))
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click.echo(click.style('More colors', fg=(255, 12, 128), bg=117))
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|
|
|
Supported color names:
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|
|
* ``black`` (might be a gray)
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|
* ``red``
|
|
* ``green``
|
|
* ``yellow`` (might be an orange)
|
|
* ``blue``
|
|
* ``magenta``
|
|
* ``cyan``
|
|
* ``white`` (might be light gray)
|
|
* ``bright_black``
|
|
* ``bright_red``
|
|
* ``bright_green``
|
|
* ``bright_yellow``
|
|
* ``bright_blue``
|
|
* ``bright_magenta``
|
|
* ``bright_cyan``
|
|
* ``bright_white``
|
|
* ``reset`` (reset the color code only)
|
|
|
|
If the terminal supports it, color may also be specified as:
|
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|
|
- An integer in the interval [0, 255]. The terminal must support
|
|
8-bit/256-color mode.
|
|
- An RGB tuple of three integers in [0, 255]. The terminal must
|
|
support 24-bit/true-color mode.
|
|
|
|
See https://en.wikipedia.org/wiki/ANSI_color and
|
|
https://gist.github.com/XVilka/8346728 for more information.
|
|
|
|
:param text: the string to style with ansi codes.
|
|
:param fg: if provided this will become the foreground color.
|
|
:param bg: if provided this will become the background color.
|
|
:param bold: if provided this will enable or disable bold mode.
|
|
:param dim: if provided this will enable or disable dim mode. This is
|
|
badly supported.
|
|
:param underline: if provided this will enable or disable underline.
|
|
:param overline: if provided this will enable or disable overline.
|
|
:param italic: if provided this will enable or disable italic.
|
|
:param blink: if provided this will enable or disable blinking.
|
|
:param reverse: if provided this will enable or disable inverse
|
|
rendering (foreground becomes background and the
|
|
other way round).
|
|
:param strikethrough: if provided this will enable or disable
|
|
striking through text.
|
|
:param reset: by default a reset-all code is added at the end of the
|
|
string which means that styles do not carry over. This
|
|
can be disabled to compose styles.
|
|
|
|
.. versionchanged:: 8.0
|
|
A non-string ``message`` is converted to a string.
|
|
|
|
.. versionchanged:: 8.0
|
|
Added support for 256 and RGB color codes.
|
|
|
|
.. versionchanged:: 8.0
|
|
Added the ``strikethrough``, ``italic``, and ``overline``
|
|
parameters.
|
|
|
|
.. versionchanged:: 7.0
|
|
Added support for bright colors.
|
|
|
|
.. versionadded:: 2.0
|
|
"""
|
|
if not isinstance(text, str):
|
|
text = str(text)
|
|
|
|
bits = []
|
|
|
|
if fg:
|
|
try:
|
|
bits.append(f"\033[{_interpret_color(fg)}m")
|
|
except KeyError:
|
|
raise TypeError(f"Unknown color {fg!r}") from None
|
|
|
|
if bg:
|
|
try:
|
|
bits.append(f"\033[{_interpret_color(bg, 10)}m")
|
|
except KeyError:
|
|
raise TypeError(f"Unknown color {bg!r}") from None
|
|
|
|
if bold is not None:
|
|
bits.append(f"\033[{1 if bold else 22}m")
|
|
if dim is not None:
|
|
bits.append(f"\033[{2 if dim else 22}m")
|
|
if underline is not None:
|
|
bits.append(f"\033[{4 if underline else 24}m")
|
|
if overline is not None:
|
|
bits.append(f"\033[{53 if overline else 55}m")
|
|
if italic is not None:
|
|
bits.append(f"\033[{3 if italic else 23}m")
|
|
if blink is not None:
|
|
bits.append(f"\033[{5 if blink else 25}m")
|
|
if reverse is not None:
|
|
bits.append(f"\033[{7 if reverse else 27}m")
|
|
if strikethrough is not None:
|
|
bits.append(f"\033[{9 if strikethrough else 29}m")
|
|
bits.append(text)
|
|
if reset:
|
|
bits.append(_ansi_reset_all)
|
|
return "".join(bits)
|
|
|
|
|
|
def unstyle(text: str) -> str:
|
|
"""Removes ANSI styling information from a string. Usually it's not
|
|
necessary to use this function as Click's echo function will
|
|
automatically remove styling if necessary.
|
|
|
|
.. versionadded:: 2.0
|
|
|
|
:param text: the text to remove style information from.
|
|
"""
|
|
return strip_ansi(text)
|
|
|
|
|
|
def secho(
|
|
message: t.Optional[t.Any] = None,
|
|
file: t.Optional[t.IO[t.AnyStr]] = None,
|
|
nl: bool = True,
|
|
err: bool = False,
|
|
color: t.Optional[bool] = None,
|
|
**styles: t.Any,
|
|
) -> None:
|
|
"""This function combines :func:`echo` and :func:`style` into one
|
|
call. As such the following two calls are the same::
|
|
|
|
click.secho('Hello World!', fg='green')
|
|
click.echo(click.style('Hello World!', fg='green'))
|
|
|
|
All keyword arguments are forwarded to the underlying functions
|
|
depending on which one they go with.
|
|
|
|
Non-string types will be converted to :class:`str`. However,
|
|
:class:`bytes` are passed directly to :meth:`echo` without applying
|
|
style. If you want to style bytes that represent text, call
|
|
:meth:`bytes.decode` first.
|
|
|
|
.. versionchanged:: 8.0
|
|
A non-string ``message`` is converted to a string. Bytes are
|
|
passed through without style applied.
|
|
|
|
.. versionadded:: 2.0
|
|
"""
|
|
if message is not None and not isinstance(message, (bytes, bytearray)):
|
|
message = style(message, **styles)
|
|
|
|
return echo(message, file=file, nl=nl, err=err, color=color)
|
|
|
|
|
|
def edit(
|
|
text: t.Optional[t.AnyStr] = None,
|
|
editor: t.Optional[str] = None,
|
|
env: t.Optional[t.Mapping[str, str]] = None,
|
|
require_save: bool = True,
|
|
extension: str = ".txt",
|
|
filename: t.Optional[str] = None,
|
|
) -> t.Optional[t.AnyStr]:
|
|
r"""Edits the given text in the defined editor. If an editor is given
|
|
(should be the full path to the executable but the regular operating
|
|
system search path is used for finding the executable) it overrides
|
|
the detected editor. Optionally, some environment variables can be
|
|
used. If the editor is closed without changes, `None` is returned. In
|
|
case a file is edited directly the return value is always `None` and
|
|
`require_save` and `extension` are ignored.
|
|
|
|
If the editor cannot be opened a :exc:`UsageError` is raised.
|
|
|
|
Note for Windows: to simplify cross-platform usage, the newlines are
|
|
automatically converted from POSIX to Windows and vice versa. As such,
|
|
the message here will have ``\n`` as newline markers.
|
|
|
|
:param text: the text to edit.
|
|
:param editor: optionally the editor to use. Defaults to automatic
|
|
detection.
|
|
:param env: environment variables to forward to the editor.
|
|
:param require_save: if this is true, then not saving in the editor
|
|
will make the return value become `None`.
|
|
:param extension: the extension to tell the editor about. This defaults
|
|
to `.txt` but changing this might change syntax
|
|
highlighting.
|
|
:param filename: if provided it will edit this file instead of the
|
|
provided text contents. It will not use a temporary
|
|
file as an indirection in that case.
|
|
"""
|
|
from ._termui_impl import Editor
|
|
|
|
ed = Editor(editor=editor, env=env, require_save=require_save, extension=extension)
|
|
|
|
if filename is None:
|
|
return ed.edit(text)
|
|
|
|
ed.edit_file(filename)
|
|
return None
|
|
|
|
|
|
def launch(url: str, wait: bool = False, locate: bool = False) -> int:
|
|
"""This function launches the given URL (or filename) in the default
|
|
viewer application for this file type. If this is an executable, it
|
|
might launch the executable in a new session. The return value is
|
|
the exit code of the launched application. Usually, ``0`` indicates
|
|
success.
|
|
|
|
Examples::
|
|
|
|
click.launch('https://click.palletsprojects.com/')
|
|
click.launch('/my/downloaded/file', locate=True)
|
|
|
|
.. versionadded:: 2.0
|
|
|
|
:param url: URL or filename of the thing to launch.
|
|
:param wait: Wait for the program to exit before returning. This
|
|
only works if the launched program blocks. In particular,
|
|
``xdg-open`` on Linux does not block.
|
|
:param locate: if this is set to `True` then instead of launching the
|
|
application associated with the URL it will attempt to
|
|
launch a file manager with the file located. This
|
|
might have weird effects if the URL does not point to
|
|
the filesystem.
|
|
"""
|
|
from ._termui_impl import open_url
|
|
|
|
return open_url(url, wait=wait, locate=locate)
|
|
|
|
|
|
# If this is provided, getchar() calls into this instead. This is used
|
|
# for unittesting purposes.
|
|
_getchar: t.Optional[t.Callable[[bool], str]] = None
|
|
|
|
|
|
def getchar(echo: bool = False) -> str:
|
|
"""Fetches a single character from the terminal and returns it. This
|
|
will always return a unicode character and under certain rare
|
|
circumstances this might return more than one character. The
|
|
situations which more than one character is returned is when for
|
|
whatever reason multiple characters end up in the terminal buffer or
|
|
standard input was not actually a terminal.
|
|
|
|
Note that this will always read from the terminal, even if something
|
|
is piped into the standard input.
|
|
|
|
Note for Windows: in rare cases when typing non-ASCII characters, this
|
|
function might wait for a second character and then return both at once.
|
|
This is because certain Unicode characters look like special-key markers.
|
|
|
|
.. versionadded:: 2.0
|
|
|
|
:param echo: if set to `True`, the character read will also show up on
|
|
the terminal. The default is to not show it.
|
|
"""
|
|
global _getchar
|
|
|
|
if _getchar is None:
|
|
from ._termui_impl import getchar as f
|
|
|
|
_getchar = f
|
|
|
|
return _getchar(echo)
|
|
|
|
|
|
def raw_terminal() -> t.ContextManager[int]:
|
|
from ._termui_impl import raw_terminal as f
|
|
|
|
return f()
|
|
|
|
|
|
def pause(info: t.Optional[str] = None, err: bool = False) -> None:
|
|
"""This command stops execution and waits for the user to press any
|
|
key to continue. This is similar to the Windows batch "pause"
|
|
command. If the program is not run through a terminal, this command
|
|
will instead do nothing.
|
|
|
|
.. versionadded:: 2.0
|
|
|
|
.. versionadded:: 4.0
|
|
Added the `err` parameter.
|
|
|
|
:param info: The message to print before pausing. Defaults to
|
|
``"Press any key to continue..."``.
|
|
:param err: if set to message goes to ``stderr`` instead of
|
|
``stdout``, the same as with echo.
|
|
"""
|
|
if not isatty(sys.stdin) or not isatty(sys.stdout):
|
|
return
|
|
|
|
if info is None:
|
|
info = _("Press any key to continue...")
|
|
|
|
try:
|
|
if info:
|
|
echo(info, nl=False, err=err)
|
|
try:
|
|
getchar()
|
|
except (KeyboardInterrupt, EOFError):
|
|
pass
|
|
finally:
|
|
if info:
|
|
echo(err=err)
|