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Replace iterkeys with keys
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1 changed files with 1 additions and 1 deletions
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@ -137,7 +137,7 @@ class VideoNode(Node):
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except AttributeError:
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raise TemplateSyntaxError(
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'Incorrect size.\nPossible format is WIDTHxHEIGHT or using '
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'predefined size ({sizes}).'.format(sizes=', '.join(sizes.iterkeys()))
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'predefined size ({sizes}).'.format(sizes=', '.join(sizes.keys()))
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)
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def __iter__(self):
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