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Issue #12451: Add support.create_empty_file()

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We don't need to create a temporary buffered binary or text file object just to
create an empty file.

Replace also os.fdopen(handle).close() by os.close(handle).
This commit is contained in:
Victor Stinner 2011-06-30 23:25:47 +02:00
parent 61600cb0c3
commit bf816223df
17 changed files with 50 additions and 53 deletions
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7
Lib/test/support.py
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@ -40,7 +40,7 @@ __all__ = [
"is_resource_enabled", "requires", "requires_linux_version",
"requires_mac_ver", "find_unused_port", "bind_port",
"IPV6_ENABLED", "is_jython", "TESTFN", "HOST", "SAVEDCWD", "temp_cwd",
"findfile", "sortdict", "check_syntax_error", "open_urlresource",
"findfile", "create_empty_file", "sortdict", "check_syntax_error", "open_urlresource",
"check_warnings", "CleanImport", "EnvironmentVarGuard", "TransientResource",
"captured_stdout", "captured_stdin", "captured_stderr", "time_out",
"socket_peer_reset", "ioerror_peer_reset", "run_with_locale", 'temp_umask',
@ -596,6 +596,11 @@ def findfile(file, here=__file__, subdir=None):
if os.path.exists(fn): return fn
return file
def create_empty_file(filename):
"""Create an empty file. If the file already exists, truncate it."""
fd = os.open(filename, os.O_WRONLY | os.O_CREAT | os.O_TRUNC)
os.close(fd)
def sortdict(dict):
"Like repr(dict), but in sorted order."
items = sorted(dict.items())