"""A minimal subset of the locale module used at interpreter startup
(imported by the _io module), in order to reduce startup time.

Don't import directly from third-party code; use the `locale` module instead!
"""

import sys
import _locale

if sys.platform.startswith("win"):
def getpreferredencoding(do_setlocale=True):
return _locale._getdefaultlocale()[1]
else:
try:
_locale.CODESET
except AttributeError:
def getpreferredencoding(do_setlocale=True):
# This path for legacy systems needs the more complex
# getdefaultlocale() function, import the full locale module.
import locale
return locale.getpreferredencoding(do_setlocale)
else:
def getpreferredencoding(do_setlocale=True):
assert not do_setlocale
result = _locale.nl_langinfo(_locale.CODESET)
if not result and sys.platform == 'darwin':
# nl_langinfo can return an empty string
# when the setting has an invalid value.
# Default to UTF-8 in that case because
# UTF-8 is the default charset on OSX and
# returning nothing will crash the
# interpreter.
result = 'UTF-8'
return result