Github user BryanCutler commented on a diff in the pull request:
https://github.com/apache/spark/pull/20373#discussion_r164602629
--- Diff: python/pyspark/cloudpickle.py ---
@@ -318,6 +329,24 @@ def save_function(self, obj, name=None):
Determines what kind of function obj is (e.g. lambda, defined at
interactive prompt, etc) and handles the pickling appropriately.
"""
+ try:
+ should_special_case = obj in _BUILTIN_TYPE_CONSTRUCTORS
+ except TypeError:
+ # Methods of builtin types aren't hashable in python 2.
+ should_special_case = False
--- End diff --
BACKPORTED
BUG: Handle instance methods of builtin types
https://github.com/cloudpipe/cloudpickle/pull/145
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