Eliminado venv y www del repositorio, agrege un requirements igual

venv/lib/python3.8/site-packages/pip/_internal/utils/models.py

@@ -1,5 +1,7 @@
 """Utilities for defining models
 """
+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
 
 import operator
 
@@ -8,6 +10,8 @@ class KeyBasedCompareMixin(object):
     """Provides comparison capabilities that is based on a key
     """
 
+    __slots__ = ['_compare_key', '_defining_class']
+
     def __init__(self, key, defining_class):
         self._compare_key = key
         self._defining_class = defining_class