misc.py 文件源码

def setlocale(category, loc=None, printer=None):
        """Wraps locale.setlocale(), falling back to the C locale if the desired
        locale is broken or unavailable.  The 'printer' parameter should be a
        function which takes a string and displays it.  If 'None' (the default),
        setlocale() will print the message to stderr."""

        if printer is None:
                printer = emsg

        try:
                locale.setlocale(category, loc)
                # Because of Python bug 813449, getdefaultlocale may fail
                # with a ValueError even if setlocale succeeds. So we call
                # it here to prevent having this error raised if it is
                # called later by other non-pkg(7) code.
                locale.getdefaultlocale()
        except (locale.Error, ValueError):
                try:
                        dl = " '{0}.{1}'".format(*locale.getdefaultlocale())
                except ValueError:
                        dl = ""
                printer("Unable to set locale{0}; locale package may be broken "
                    "or\nnot installed.  Reverting to C locale.".format(dl))
                locale.setlocale(category, "C")