Exception: Callable has no attribute __abc_registry #20
Description
Expected Behavior
Cybersource-REST-Client-Python should work with the Python 3.7.
Actual Behavior
Users receive a Callable has no attribute __abc_registry error.
This is a known issue when installing typing on a system that has Python > 3.6 because typing is in the standard library since version 3.5. Importing typing with Python 3.7 fails.
Cloudwatch Log
[ERROR] AttributeError: type object 'Callable' has no attribute '_abc_registry'
Traceback (most recent call last):
File "/var/lang/lib/python3.7/imp.py", line 234, in load_module
return load_source(name, filename, file)
File "/var/lang/lib/python3.7/imp.py", line 171, in load_source
module = _load(spec)
File "<frozen importlib._bootstrap>", line 696, in _load
File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 728, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/var/task/app.py", line 4, in <module>
from typing import Optional
File "/var/task/typing.py", line 1347, in <module>
class Callable(extra=collections_abc.Callable, metaclass=CallableMeta):
File "/var/task/typing.py", line 1003, in __new__
self._abc_registry = extra._abc_registry
Steps to Reproduce the Problem
- Installed the latest available version of the SDK through pip so it will install all required dependencies too.
- Create a test.py file and import the Cybersource SDK in an environment with Python > 3.5.
- Execute the script python or upload the code to Lambda and run it.
Suggestion for Fix
Opened a PR here: #21