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util.py
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92 lines (78 loc) · 2.12 KB
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# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License.
import contextlib
try:
from io import StringIO
except ImportError:
from StringIO import StringIO # 2.7
import sys
@contextlib.contextmanager
def noop_cm():
yield
@contextlib.contextmanager
def hide_stdio():
"""Swallow stdout and stderr."""
ignored = StdioStream()
sys.stdout = ignored
sys.stderr = ignored
try:
yield ignored
finally:
sys.stdout = sys.__stdout__
sys.stderr = sys.__stderr__
if sys.version_info < (3,):
class StdioStream(StringIO):
def write(self, msg):
StringIO.write(self, msg.decode())
else:
StdioStream = StringIO
def group_attr_names(attrnames):
grouped = {
'dunder': [],
'private': [],
'constants': [],
'classes': [],
'vars': [],
'other': [],
}
for name in attrnames:
if name.startswith('__') and name.endswith('__'):
group = 'dunder'
elif name.startswith('_'):
group = 'private'
elif name.isupper():
group = 'constants'
elif name.islower():
group = 'vars'
elif name == name.capitalize():
group = 'classes'
else:
group = 'other'
grouped[group].append(name)
return grouped
def shlex_unsplit(argv):
"""Return the shell-safe string for the given arguments.
This effectively the equivalent of reversing shlex.split().
"""
argv = [_quote_arg(a) for a in argv]
return ' '.join(argv)
try:
from shlex import quote as _quote_arg
except ImportError:
def _quote_arg(arg):
parts = None
for i, c in enumerate(arg):
if c.isspace():
pass
elif c == '"':
pass
elif c == "'":
c = "'\"'\"'"
else:
continue
if parts is None:
parts = list(arg)
parts[i] = c
if parts is not None:
arg = "'" + ''.join(parts) + "'"
return arg