Code import

venv/lib/python2.7/site-packages/pip/models/__init__.py

@@ -0,0 +1,4 @@
+from pip.models.index import Index, PyPI
+
+
+__all__ = ["Index", "PyPI"]

venv/lib/python2.7/site-packages/pip/models/index.py

@@ -0,0 +1,16 @@
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+
+class Index(object):
+    def __init__(self, url):
+        self.url = url
+        self.netloc = urllib_parse.urlsplit(url).netloc
+        self.simple_url = self.url_to_path('simple')
+        self.pypi_url = self.url_to_path('pypi')
+        self.pip_json_url = self.url_to_path('pypi/pip/json')
+
+    def url_to_path(self, path):
+        return urllib_parse.urljoin(self.url, path)
+
+
+PyPI = Index('https://pypi.python.org/')