MAINT: Revise imports from urllib modules

numpy/lib/_datasource.py

@@ -305,10 +305,7 @@ def _isurl(self, path):
         """Test if path is a net location.  Tests the scheme and netloc."""
 
         # We do this here to reduce the 'import numpy' initial import time.
-        if sys.version_info[0] >= 3:
-            from urllib.parse import urlparse
-        else:
-            from urlparse import urlparse
+        from urllib.parse import urlparse
 
         # BUG : URLs require a scheme string ('http://') to be used.
         #       www.google.com will fail.
@@ -325,14 +322,10 @@ def _cache(self, path):
         Creates a copy of the file in the datasource cache.
 
         """
-        # We import these here because importing urllib2 is slow and
+        # We import these here because importing urllib is slow and
         # a significant fraction of numpy's total import time.
-        if sys.version_info[0] >= 3:
-            from urllib.request import urlopen
-            from urllib.error import URLError
-        else:
-            from urllib2 import urlopen
-            from urllib2 import URLError
+        from urllib.request import urlopen
+        from urllib.error import URLError
 
         upath = self.abspath(path)
 
@@ -407,10 +400,7 @@ def abspath(self, path):
 
         """
         # We do this here to reduce the 'import numpy' initial import time.
-        if sys.version_info[0] >= 3:
-            from urllib.parse import urlparse
-        else:
-            from urlparse import urlparse
+        from urllib.parse import urlparse
 
         # TODO:  This should be more robust.  Handles case where path includes
         #        the destpath, but not other sub-paths. Failing case:

tools/openblas_support.py

@@ -4,14 +4,10 @@
 import shutil
 import textwrap
 import platform
-try:
-    from urllib.request import urlopen
-    from urllib.error import HTTPError
-except:
-    #Python2
-    from urllib2 import urlopen, HTTPError
 
 from tempfile import mkstemp, gettempdir
+from urllib.request import urlopen
+from urllib.error import HTTPError
 import zipfile
 import tarfile