8000 Fix TypeError: a bytes-like object is required, not 'str' by cgohlke · Pull Request #9292 · matplotlib/matplotlib · GitHub
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Fix TypeError: a bytes-like object is required, not 'str' #9292

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Merged
merged 2 commits into from
Oct 23, 2017
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Fix TypeError: a bytes-like object is required, not 'str' #9292

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37ad476
Fix TypeError: a bytes-like object is required, not 'str'
cgohlke Oct 6, 2017
ab4a691
DOC: add note about encoding choice
tacaswell Oct 21, 2017
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6 changes: 6 additions & 0 deletions lib/matplotlib/dviread.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1030,6 +1030,12 @@ def find_tex_file(filename, format=None):
The library that :program:`kpsewhich` is part of.
"""

if six.PY3:
if isinstance(filename, bytes):
filename = filename.decode('utf-8', errors='replace')
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Should probably use https://docs.python.org/3/library/os.html#os.fsdecode here?
For format I dunno what is the correct encoding; that probably is deep into the kpsewhich sources but I guess all relevant formats have ASCII compatible names so utf-8 should just be fine.

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Not sure the filesystem encoding is a better choice for a function searching for a file. Is this even relevant? MikTeX's kpsewhich does not find any non-ASCII file name.

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@anntzer anntzer Oct 6, 2017 •
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then perhaps add a comment that in practice the encoding is irrelevant -- other than being ASCII-compatible -- because you don't expect non-ASCII filenames to be found (to avoid later head-scratching as to why utf-8).

if isinstance(format, bytes):
format = format.decode('utf-8', errors='replace')

cmd = [str('kpsewhich')]
if format is not None:
cmd += ['--format=' + format]
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