Eliminado venv y www del repositorio, agrege un requirements igual

venv/lib/python3.8/site-packages/pip/_vendor/msgpack/__init__.py

@@ -1,30 +1,19 @@
 # coding: utf-8
-from pip._vendor.msgpack._version import version
-from pip._vendor.msgpack.exceptions import *
-
-from collections import namedtuple
-
-
-class ExtType(namedtuple('ExtType', 'code data')):
-    """ExtType represents ext type in msgpack."""
-    def __new__(cls, code, data):
-        if not isinstance(code, int):
-            raise TypeError("code must be int")
-        if not isinstance(data, bytes):
-            raise TypeError("data must be bytes")
-        if not 0 <= code <= 127:
-            raise ValueError("code must be 0~127")
-        return super(ExtType, cls).__new__(cls, code, data)
-
+from ._version import version
+from .exceptions import *
+from .ext import ExtType, Timestamp
 
 import os
-if os.environ.get('MSGPACK_PUREPYTHON'):
-    from pip._vendor.msgpack.fallback import Packer, unpackb, Unpacker
+import sys
+
+
+if os.environ.get("MSGPACK_PUREPYTHON") or sys.version_info[0] == 2:
+    from .fallback import Packer, unpackb, Unpacker
 else:
     try:
-        from pip._vendor.msgpack._cmsgpack import Packer, unpackb, Unpacker
+        from ._cmsgpack import Packer, unpackb, Unpacker
     except ImportError:
-        from pip._vendor.msgpack.fallback import Packer, unpackb, Unpacker
+        from .fallback import Packer, unpackb, Unpacker
 
 
 def pack(o, stream, **kwargs):

venv/lib/python3.8/site-packages/pip/_vendor/msgpack/_version.py

@@ -1 +1 @@
-version = (0, 6, 1)
+version = (1, 0, 0)