Youtube-dl crash when trying to get best format.

[skorokithakis]

The following code crashes with the latest youtube-dl version (relevant downstream issue):

ydl = youtube_dl.YoutubeDL({})
info = ydl.extract_info(video_url, download=False)
format_selector = ydl.build_format_selector("best")
list(format_selector(info["formats"]))

It worked up until 2016.07.13, and now it breaks:

----> 1 list(format_selector(info["formats"]))

youtube_dl/YoutubeDL.pyc in selector_function(ctx)
   1055                 def selector_function(ctx):
   1056                     for f in fs:
-> 1057                         for format in f(ctx):
   1058                             yield format
   1059                 return selector_function

youtube_dl/YoutubeDL.pyc in selector_function(ctx)
   1073 
   1074                 def selector_function(ctx):
-> 1075                     formats = list(ctx['formats'])
   1076                     if not formats:
   1077                         return

TypeError: list indices must be integers, not unicode

[yan12125]

list(format_selector(info["formats"]))

is incorrect. Use:

list(format_selector(info))