Update request urllib3 (#464)

* requests: updated to version 2.27.1

* urllib3: updated to version 1.26.18

lib/urllib3/request.py

@@ -1,8 +1,10 @@
 from __future__ import absolute_import
 
-from .filepost import encode_multipart_formdata
-from .packages.six.moves.urllib.parse import urlencode
+import sys
 
+from .filepost import encode_multipart_formdata
+from .packages import six
+from .packages.six.moves.urllib.parse import urlencode
 
 __all__ = ["RequestMethods"]
 
@@ -10,8 +12,8 @@ __all__ = ["RequestMethods"]
 class RequestMethods(object):
     """
     Convenience mixin for classes who implement a :meth:`urlopen` method, such
-    as :class:`~urllib3.connectionpool.HTTPConnectionPool` and
-    :class:`~urllib3.poolmanager.PoolManager`.
+    as :class:`urllib3.HTTPConnectionPool` and
+    :class:`urllib3.PoolManager`.
 
     Provides behavior for making common types of HTTP request methods and
     decides which type of request field encoding to use.
@@ -111,9 +113,9 @@ class RequestMethods(object):
         the body. This is useful for request methods like POST, PUT, PATCH, etc.
 
         When ``encode_multipart=True`` (default), then
-        :meth:`urllib3.filepost.encode_multipart_formdata` is used to encode
+        :func:`urllib3.encode_multipart_formdata` is used to encode
         the payload with the appropriate content type. Otherwise
-        :meth:`urllib.urlencode` is used with the
+        :func:`urllib.parse.urlencode` is used with the
         'application/x-www-form-urlencoded' content type.
 
         Multipart encoding must be used when posting files, and it's reasonably
@@ -169,3 +171,21 @@ class RequestMethods(object):
         extra_kw.update(urlopen_kw)
 
         return self.urlopen(method, url, **extra_kw)
+
+
+if not six.PY2:
+
+    class RequestModule(sys.modules[__name__].__class__):
+        def __call__(self, *args, **kwargs):
+            """
+            If user tries to call this module directly urllib3 v2.x style raise an error to the user
+            suggesting they may need urllib3 v2
+            """
+            raise TypeError(
+                "'module' object is not callable\n"
+                "urllib3.request() method is not supported in this release, "
+                "upgrade to urllib3 v2 to use it\n"
+                "see https://urllib3.readthedocs.io/en/stable/v2-migration-guide.html"
+            )
+
+    sys.modules[__name__].__class__ = RequestModule