Upgrade setuptools, appdirs, cachecontrol, distro, ipaddress, pyparsing, and requests (#4342)

* Upgrade setuptools to 34.3.2
* Upgrade appdirs to 1.4.3
* Upgrade CacheControl to 0.12.1
* Upgrade distro to 1.0.2
* Upgrade ipaddress to 1.0.18
* Upgrade pyparsing to 2.2.0
* Upgrade requests to 2.13.0
* Remove patching of progress
* Don't translate imports that would be syntax errors
* Patch pkg_resources to handle packaging correctly

1 files changed, 37 insertions, 0 deletions

diff --git a/pip/_vendor/requests/packages/urllib3/exceptions.py b/pip/_vendor/requests/packages/urllib3/exceptions.py
index f2e65917b..6c4be5810 100644
--- a/pip/_vendor/requests/packages/urllib3/exceptions.py
+++ b/pip/_vendor/requests/packages/urllib3/exceptions.py
@@ -1,4 +1,7 @@
 from __future__ import absolute_import
+from .packages.six.moves.http_client import (
+    IncompleteRead as httplib_IncompleteRead
+)
 # Base Exceptions
 
 
@@ -193,6 +196,35 @@ class ResponseNotChunked(ProtocolError, ValueError):
     pass
 
 
+class BodyNotHttplibCompatible(HTTPError):
+    """
+    Body should be httplib.HTTPResponse like (have an fp attribute which
+    returns raw chunks) for read_chunked().
+    """
+    pass
+
+
+class IncompleteRead(HTTPError, httplib_IncompleteRead):
+    """
+    Response length doesn't match expected Content-Length
+
+    Subclass of http_client.IncompleteRead to allow int value
+    for `partial` to avoid creating large objects on streamed
+    reads.
+    """
+    def __init__(self, partial, expected):
+        super(IncompleteRead, self).__init__(partial, expected)
+
+    def __repr__(self):
+        return ('IncompleteRead(%i bytes read, '
+                '%i more expected)' % (self.partial, self.expected))
+
+
+class InvalidHeader(HTTPError):
+    "The header provided was somehow invalid."
+    pass
+
+
 class ProxySchemeUnknown(AssertionError, ValueError):
     "ProxyManager does not support the supplied scheme"
     # TODO(t-8ch): Stop inheriting from AssertionError in v2.0.
@@ -207,3 +239,8 @@ class HeaderParsingError(HTTPError):
     def __init__(self, defects, unparsed_data):
         message = '%s, unparsed data: %r' % (defects or 'Unknown', unparsed_data)
         super(HeaderParsingError, self).__init__(message)
+
+
+class UnrewindableBodyError(HTTPError):
+    "urllib3 encountered an error when trying to rewind a body"
+    pass