Remove legacy requirements

Author: maresb

Diff for: packages/python/plotly/plotly/io/_kaleido.py

@@ -1,17 +1,11 @@
 from __future__ import absolute_import
 from six import string_types
 import os
-import sys
 import json
+from pathlib import Path, PurePath
 import plotly
 from plotly.io._utils import validate_coerce_fig_to_dict
 
-if sys.version_info >= (3, 4):
-    from pathlib import Path, PurePath
-else:
-    # For Python < 3.4 use pathlib2
-    from pathlib2 import Path, PurePath
-
 try:
     from kaleido.scopes.plotly import PlotlyScope
 

Diff for: packages/python/plotly/plotly/tests/test_optional/test_kaleido/test_kaleido.py

@@ -1,19 +1,9 @@
 import plotly.io as pio
 import plotly.io.kaleido
-import sys
 from contextlib import contextmanager
 from io import BytesIO
-
-if sys.version_info >= (3, 4):
-    from pathlib import Path
-else:
-    # For Python < 3.4 use pathlib2
-    from pathlib2 import Path
-
-if sys.version_info >= (3, 3):
-    from unittest.mock import Mock
-else:
-    from mock import Mock
+from pathlib import Path
+from unittest.mock import Mock
 
 fig = {"layout": {"title": {"text": "figure title"}}}
 

Diff for: packages/python/plotly/requirements.txt

@@ -10,6 +10,3 @@ six==1.8.0
 
 ## retrying requests ##
 retrying==1.3.3
-
-## Allow pathlib2 as pathlib substitute for old Python versions ##
-pathlib2;python_version<"3.4"

Diff for: packages/python/plotly/setup.py

@@ -505,7 +505,7 @@ def run(self):
         ),
         ("etc/jupyter/nbconfig/notebook.d", ["plotlywidget.json"]),
     ],
-    install_requires=["retrying>=1.3.3", "six", 'pathlib2;python_version<"3.4"'],
+    install_requires=["retrying>=1.3.3", "six"],
     zip_safe=False,
     cmdclass=dict(
         build_py=js_prerelease(versioneer_cmds["build_py"]),