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bpo-33671: allow setting shutil.copyfile() bufsize globally #12016

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Merged
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Feb 24, 2019
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bpo-33671: allow setting shutil.copyfile() bufsize globally #12016

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4 changes: 3 additions & 1 deletion Lib/shutil.py
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Original file line number Diff line number Diff line change
Expand Up @@ -187,9 +187,11 @@ def _copyfileobj_readinto(fsrc, fdst, length=COPY_BUFSIZE):
else:
fdst_write(mv)

def copyfileobj(fsrc, fdst, length=COPY_BUFSIZE):
def copyfileobj(fsrc, fdst, length=0):
"""copy data from file-like object fsrc to file-like object fdst"""
# Localize variable access to minimize overhead.
if not length:
length = COPY_BUFSIZE
fsrc_read = fsrc.read
fdst_write = fdst.write
while True:
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