# -*- coding: utf-8 -*- """ requests._internal_utils ~~~~~~~~~~~~~~ Provides utility functions that are consumed internally by Requests which depend on extremely few external helpers (such as compat) """ from .compat import is_py2, builtin_str, str def to_native_string(string, encoding='ascii'): """Given a string object, regardless of type, returns a representation of that string in the native string type, encoding and decoding where necessary. This assumes ASCII unless told otherwise. """ if isinstance(string, builtin_str): out = string else: if is_py2: out = string.encode(encoding) else: out = string.decode(encoding) return out def unicode_is_ascii(u_string): """Determine if unicode string only contains ASCII characters. :param str u_string: unicode string to check. Must be unicode and not Python 2 `str`. :rtype: bool """ assert isinstance(u_string, str) try: u_string.encode('ascii') return True except UnicodeEncodeError: return False