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bazarr/libs/ffsubsync/file_utils.py

36 lines
1.0 KiB

# -*- coding: utf-8 -*-
import six
import sys
class open_file(object):
"""
Context manager that opens a filename and closes it on exit, but does
nothing for file-like objects.
"""
def __init__(self, filename, *args, **kwargs):
self.closing = kwargs.pop('closing', False)
if filename is None:
stream = sys.stdout if 'w' in args else sys.stdin
if six.PY3:
self.closeable = open(stream.fileno(), *args, **kwargs)
self.fh = self.closeable.buffer
else:
self.closeable = stream
self.fh = self.closeable
elif isinstance(filename, six.string_types):
self.fh = open(filename, *args, **kwargs)
self.closeable = self.fh
self.closing = True
else:
self.fh = filename
def __enter__(self):
return self.fh
def __exit__(self, exc_type, exc_val, exc_tb):
if self.closing:
self.closeable.close()
return False