Prevent inclusion of requests_unixsocket on Windows (#5650)

* Prevent inclusion of requests_unixsocket on Windows

* lazily import

Co-authored-by: Steven Silvester <stslve@amazon.com>

notebook/tests/launchnotebook.py

@@ -16,7 +16,6 @@
 from unittest.mock import patch
 
 import requests
-import requests_unixsocket
 from tornado.ioloop import IOLoop
 import zmq
 
@@ -231,6 +230,9 @@ def base_url(cls):
 
     @staticmethod
     def fetch_url(url):
+        # Lazily import so it is not required at the module level
+        if os.name != 'nt':
+            import requests_unixsocket
         with requests_unixsocket.monkeypatch():
             return requests.get(url)
 

setup.py

@@ -117,10 +117,9 @@
     ],
     extras_require = {
         'test': ['nose', 'coverage', 'requests', 'nose_warnings_filters',
-                 'nbval', 'nose-exclude', 'selenium', 'pytest', 'pytest-cov',
-                 'requests-unixsocket'],
+                 'nbval', 'nose-exclude', 'selenium', 'pytest', 'pytest-cov'],
         'docs': ['sphinx', 'nbsphinx', 'sphinxcontrib_github_alt'],
-        'test:sys_platform == "win32"': ['nose-exclude'],
+        'test:sys_platform != "win32"': ['requests-unixsocket'],
     },
     python_requires = '>=3.5',
     entry_points = {