Fix for #1809 Python 2.7 incompatibility in the iframe renderer (#1810)

Author: carthurs

packages/python/plotly/codegen/utils.py

@@ -6,6 +6,7 @@
 from io import StringIO
 from typing import List
 import re
+import errno
 
 
 # Source code utilities
@@ -30,7 +31,11 @@ def write_source_py(py_source, filepath, leading_newlines=0):
         # Make dir if needed
         # ------------------
         filedir = opath.dirname(filepath)
-        os.makedirs(filedir, exist_ok=True)
+        try:
+            os.makedirs(filedir)
+        except OSError as error:
+            if error.errno != errno.EEXIST:
+                raise
 
         # Write file
         # ----------

packages/python/plotly/plotly/io/_base_renderers.py

@@ -4,6 +4,7 @@
 import webbrowser
 import inspect
 import os
+import errno
 
 import six
 from plotly.io import to_json, to_image, write_image, write_html
@@ -564,7 +565,11 @@ def to_mimebundle(self, fig_dict):
         filename = self.build_filename()
 
         # Make directory for
-        os.makedirs(self.html_directory, exist_ok=True)
+        try:
+            os.makedirs(self.html_directory)
+        except OSError as error:
+            if error.errno != errno.EEXIST:
+                raise
 
         write_html(
             fig_dict,