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Silence the FileExistsError which can be raised because of the O_EXCL flag

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(as in import.c)
This commit is contained in:
Antoine Pitrou 2011-10-19 23:28:40 +02:00
parent 587e75c70b
commit daaaec9ee7
1 changed files with 7 additions and 7 deletions
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14
Lib/importlib/_bootstrap.py
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@ -81,7 +81,9 @@ def _path_absolute(path):
def _write_atomic(path, data): def _write_atomic(path, data):
"""Best-effort function to write data to a path atomically.""" """Best-effort function to write data to a path atomically.
Be prepared to handle a FileExistsError if concurrent writing of the
temporary file is attempted."""
if not sys.platform.startswith('win'): if not sys.platform.startswith('win'):
# On POSIX-like platforms, renaming is atomic # On POSIX-like platforms, renaming is atomic
path_tmp = path + '.tmp' path_tmp = path + '.tmp'
@ -516,12 +518,10 @@ class _SourceFileLoader(_FileLoader, SourceLoader):
raise raise
try: try:
_write_atomic(path, data) _write_atomic(path, data)
except OSError as exc: except (PermissionError, FileExistsError):
# Don't worry if you can't write bytecode. # Don't worry if you can't write bytecode or someone is writing
if exc.errno == errno.EACCES: # it at the same time.
return pass
else:
raise
class _SourcelessFileLoader(_FileLoader, _LoaderBasics): class _SourcelessFileLoader(_FileLoader, _LoaderBasics):