tldr: refactoring

venv/lib/python3.7/site-packages/pip/_vendor/certifi/__init__.py

@@ -0,0 +1,3 @@
+from .core import where
+
+__version__ = "2019.09.11"

venv/lib/python3.7/site-packages/pip/_vendor/certifi/__main__.py

@@ -0,0 +1,2 @@
+from pip._vendor.certifi import where
+print(where())

venv/lib/python3.7/site-packages/pip/_vendor/certifi/core.py

@@ -0,0 +1,15 @@
+# -*- coding: utf-8 -*-
+
+"""
+certifi.py
+~~~~~~~~~~
+
+This module returns the installation location of cacert.pem.
+"""
+import os
+
+
+def where():
+    f = os.path.dirname(__file__)
+
+    return os.path.join(f, 'cacert.pem')