dist.py 文件源码

def _include_misc(self, name, value):
        """Handle 'include()' for list/tuple attrs without a special handler"""

        if not isinstance(value, sequence):
            raise DistutilsSetupError(
                "%s: setting must be a list (%r)" % (name, value)
            )
        try:
            old = getattr(self, name)
        except AttributeError:
            raise DistutilsSetupError(
                "%s: No such distribution setting" % name
            )
        if old is None:
            setattr(self, name, value)
        elif not isinstance(old, sequence):
            raise DistutilsSetupError(
                name + ": this setting cannot be changed via include/exclude"
            )
        else:
            new = [item for item in value if item not in old]
            setattr(self, name, old + new)