Eliminado venv y www del repositorio, agrege un requirements igual

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

@@ -5,7 +5,9 @@ import hashlib
 from pip._vendor.six import iteritems, iterkeys, itervalues
 
 from pip._internal.exceptions import (
-    HashMismatch, HashMissing, InstallationError,
+    HashMismatch,
+    HashMissing,
+    InstallationError,
 )
 from pip._internal.utils.misc import read_chunks
 from pip._internal.utils.typing import MYPY_CHECK_RUNNING
@@ -44,6 +46,26 @@ class Hashes(object):
         """
         self._allowed = {} if hashes is None else hashes
 
+    def __and__(self, other):
+        # type: (Hashes) -> Hashes
+        if not isinstance(other, Hashes):
+            return NotImplemented
+
+        # If either of the Hashes object is entirely empty (i.e. no hash
+        # specified at all), all hashes from the other object are allowed.
+        if not other:
+            return self
+        if not self:
+            return other
+
+        # Otherwise only hashes that present in both objects are allowed.
+        new = {}
+        for alg, values in iteritems(other._allowed):
+            if alg not in self._allowed:
+                continue
+            new[alg] = [v for v in values if v in self._allowed[alg]]
+        return Hashes(new)
+
     @property
     def digest_count(self):
         # type: () -> int
@@ -54,6 +76,7 @@ class Hashes(object):
         hash_name,   # type: str
         hex_digest,  # type: str
     ):
+        # type: (...) -> bool
         """Return whether the given hex digest is allowed."""
         return hex_digest in self._allowed.get(hash_name, [])
 
@@ -70,7 +93,9 @@ class Hashes(object):
             try:
                 gots[hash_name] = hashlib.new(hash_name)
             except (ValueError, TypeError):
-                raise InstallationError('Unknown hash name: %s' % hash_name)
+                raise InstallationError(
+                    'Unknown hash name: {}'.format(hash_name)
+                )
 
         for chunk in chunks:
             for hash in itervalues(gots):