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diff --git a/requests/packages/urllib3/exceptions.py b/requests/packages/urllib3/exceptions.py
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+# urllib3/exceptions.py
+# Copyright 2008-2011 Andrey Petrov and contributors (see CONTRIBUTORS.txt)
+#
+# This module is part of urllib3 and is released under
+# the MIT License: http://www.opensource.org/licenses/mit-license.php
+
+## Exceptions
+
+class HTTPError(Exception):
+    "Base exception used by this module."
+    pass
+
+
+class SSLError(Exception):
+    "Raised when SSL certificate fails in an HTTPS connection."
+    pass
+
+
+class MaxRetryError(HTTPError):
+    "Raised when the maximum number of retries is exceeded."
+    def __init__(self, url):
+        HTTPError.__init__(self, "Max retries exceeded for url: %s" % url)
+        self.url = url
+
+
+class TimeoutError(HTTPError):
+    "Raised when a socket timeout occurs."
+    pass
+
+
+class HostChangedError(HTTPError):
+    "Raised when an existing pool gets a request for a foreign host."
+    def __init__(self, original_host, new_url, retries=3):
+        HTTPError.__init__(self,
+            "Connection pool with host '%s' tried to open a foreign host: %s" %
+            (original_host, new_url))
+
+        self.original_host = original_host
+        self.new_url = new_url
+        self.retries = retries
+
+
+class EmptyPoolError(HTTPError):
+    "Raised when a pool runs out of connections and no more are allowed."
+    pass