Nikolaus Rath added the comment:
Question:
What is the point of the
old_encoding = codecs.lookup(self._encoding).name
encoding = codecs.lookup(encoding).name
if encoding == old_encoding and errors == self._errors:
# no change
return
dance? Isn't this equivalent to
if encoding == self.encoding and errors == self._errors:
# no change
return
except that it doesn't validate the given encoding? But if the encoding is
invalid, isn't it enough that the exception is raised a few lines further down?
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<http://bugs.python.org/issue15216>
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