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# lamosity needed to make things reliable on Windows :-( # (borrowed from Python's test_support.py) import errno import os import shutil import sys import time import warnings if sys.platform.startswith("win"): # pragma: no cover def _waitfor(func, pathname, waitall=False): # Perform the operation func(pathname) # Now setup the wait loop if waitall: dirname = pathname else: dirname, name = os.path.split(pathname) dirname = dirname or '.' # Check for `pathname` to be removed from the filesystem. # The exponential backoff of the timeout amounts to a total # of ~1 second after which the deletion is probably an error # anyway. # Testing on a i7@4.3GHz shows that usually only 1 iteration is # required when contention occurs. timeout = 0.001 while timeout < 1.0: # pragma: no branch # Note we are only testing for the existence of the file(s) in # the contents of the directory regardless of any security or # access rights. If we have made it this far, we have sufficient # permissions to do that much using Python's equivalent of the # Windows API FindFirstFile. # Other Windows APIs can fail or give incorrect results when # dealing with files that are pending deletion. L = os.listdir(dirname) if not (L if waitall else name in L): # pragma: no branch return # Increase the timeout and try again time.sleep(timeout) # pragma: no cover timeout *= 2 # pragma: no cover warnings.warn('tests may fail, delete still pending for ' + pathname, # pragma: no cover RuntimeWarning, stacklevel=4) def _rmtree(path): def _rmtree_inner(path): for name in os.listdir(path): fullname = os.path.join(path, name) if os.path.isdir(fullname): _waitfor(_rmtree_inner, fullname, waitall=True) os.rmdir(fullname) else: os.unlink(fullname) _waitfor(_rmtree_inner, path, waitall=True) _waitfor(os.rmdir, path) else: _rmtree = shutil.rmtree def rmtree(path): try: _rmtree(path) except OSError as e: # pragma: no cover # Unix returns ENOENT, Windows returns ESRCH. if e.errno not in (errno.ENOENT, errno.ESRCH): # pragma: no branch raise
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