1 from __future__ import unicode_literals
5 from .common import PostProcessor
6 from ..utils import PostProcessingError
9 class MetadataFromTitlePPError(PostProcessingError):
13 class MetadataFromTitlePP(PostProcessor):
14 def __init__(self, downloader, titleformat):
15 super(MetadataFromTitlePP, self).__init__(downloader)
16 self._titleformat = titleformat
17 self._titleregex = self.format_to_regex(titleformat)
19 def format_to_regex(self, fmt):
21 Converts a string like
22 '%(title)s - %(artist)s'
24 '(?P<title>.+)\ \-\ (?P<artist>.+)'
28 # replace %(..)s with regex group and escape other string parts
29 for match in re.finditer(r'%\((\w+)\)s', fmt):
30 regex += re.escape(fmt[lastpos:match.start()])
31 regex += r'(?P<' + match.group(1) + '>.+)'
33 if lastpos < len(fmt):
34 regex += re.escape(fmt[lastpos:len(fmt)])
39 match = re.match(self._titleregex, title)
41 raise MetadataFromTitlePPError('Could not interpret title of video as "%s"' % self._titleformat)
42 for attribute, value in match.groupdict().items():
43 value = match.group(attribute)
44 info[attribute] = value
45 self._downloader.to_screen('[fromtitle] parsed ' + attribute + ': ' + value)