Fix pathlib/pathlib2 import in test_kaleido.py

Author: maresb

packages/python/plotly/plotly/tests/test_optional/test_kaleido/test_kaleido.py

@@ -1,9 +1,14 @@
 import plotly.io as pio
 import plotly.io.kaleido
 import sys
-from pathlib import Path
 from contextlib import contextmanager
 
+try:
+    from pathlib import Path
+except ImportError:
+    # For Python < 3.4 use pathlib2
+    from pathlib2 import Path
+
 if sys.version_info >= (3, 3):
     from unittest.mock import Mock
 else: