Serhiy Storchaka <[email protected]> added the comment:
The problem is that seek() doesn't work properly with files opened in append
mode.
with open('file', 'ab') as f:
f.write(b'abcd')
f.seek(0)
f.write(b'efgh')
f.flush()
with open('file', 'rb') as f:
print(f.read())
The result is b'abcdefgh' instead of expected b'efgh'.
----------
resolution: duplicate ->
stage: resolved ->
status: closed -> open
superseder: Regression in zipfile writing in 2.7.13 ->
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Python tracker <[email protected]>
<https://bugs.python.org/issue30213>
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