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more explicit error message when saving to a file with invalid extension

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This commit is contained in:
ces42 2017-02-13 18:06:26 +01:00 committed by GitHub
parent 0f9233623e
commit 955f6848fd
1 changed files with 4 additions and 1 deletions
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5
PIL/Image.py
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@ -1715,7 +1715,10 @@ class Image(object):
if not format:
if ext not in EXTENSION:
init()
format = EXTENSION[ext]
try:
format = EXTENSION[ext]
except KeyError:
raise ValueError('unknown file extension: {}'.format(ext))
if format.upper() not in SAVE:
init()