Escape square brackets in regex

NZBGet/scripts/Clean/Clean.py

@@ -48,10 +48,10 @@ fwp = re.sub('(?i)-Rakuv\.nzb$', '.nzb', fwp)
 fwp = re.sub('(?i)-Scrambled\.nzb$', '.nzb', fwp)
 fwp = re.sub('(?i)-WhiteRev\.nzb$', '.nzb', fwp)
 fwp = re.sub('(?i)-xpost\.nzb$', '.nzb', fwp)
-fwp = re.sub('(?i)[eztv]\.nzb$', '.nzb', fwp)
-fwp = re.sub('(?i)[TGx]\.nzb$', '.nzb', fwp)
-fwp = re.sub('(?i)[TGx]-xpost\.nzb$', '.nzb', fwp)
-fwp = re.sub('(?i)[ettv]\.nzb$', '.nzb', fwp)
+fwp = re.sub('(?i)\[eztv\]\.nzb$', '.nzb', fwp)
+fwp = re.sub('(?i)\[TGx\]\.nzb$', '.nzb', fwp)
+fwp = re.sub('(?i)\[TGx\]-xpost\.nzb$', '.nzb', fwp)
+fwp = re.sub('(?i)\[ettv\]\.nzb$', '.nzb', fwp)
 if fwp:
   print('[NZB] NZBNAME=', fwp, sep='')