revert to older requests version

lib/requests/_internal_utils.py

@@ -1,42 +0,0 @@
-# -*- 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