Python: Copy Python extractor to codeql repo

python/extractor/get_venv_lib.py

@@ -0,0 +1,35 @@
+import os
+import sys
+
+
+def pip_installed_folder():
+    try:
+        import pip
+    except ImportError:
+        print("ERROR: 'pip' not installed.")
+        sys.exit(2)
+    dirname, filename = os.path.split(pip.__file__)
+    if filename.startswith("__init__."):
+        dirname = os.path.dirname(dirname)
+    return dirname
+
+def first_site_packages():
+    dist_packages = None
+    for path in sys.path:
+        if "site-packages" in path:
+            return path
+        if "dist-packages" in path and not dist_packages:
+            dist_packages = path
+    if dist_packages:
+        return dist_packages
+    # No site-packages or dist-packages?
+    raise Exception
+
+def get_venv_lib():
+    try:
+        return pip_installed_folder()
+    except:
+        return first_site_packages()
+
+if __name__=='__main__':
+    print(get_venv_lib())