Partially Unitialized error when using module

[jwitko]

OS: Ubuntu 18.04.5 LTS

Error: failed to execute "/bin/sh": Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.9.1/x64/bin/kms-encryption", line 33, in <module>
    sys.exit(load_entry_point('kms-encryption-toolbox==0.1.7', 'console_scripts', 'kms-encryption')())
  File "/opt/hostedtoolcache/Python/3.9.1/x64/bin/kms-encryption", line 25, in importlib_load_entry_point
    return next(matches).load()
  File "/opt/hostedtoolcache/Python/3.9.1/x64/lib/python3.9/importlib/metadata.py", line 77, in load
    module = import_module(match.group('module'))
  File "/opt/hostedtoolcache/Python/3.9.1/x64/lib/python3.9/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 972, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 790, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "/opt/hostedtoolcache/Python/3.9.1/x64/lib/python3.9/site-packages/kmsencryption/__init__.py", line 1, in <module>
    from kmsencryption.lib import encrypt
  File "/opt/hostedtoolcache/Python/3.9.1/x64/lib/python3.9/site-packages/kmsencryption/lib.py", line 5, in <module>
    import aws_encryption_sdk
  File "/opt/hostedtoolcache/Python/3.9.1/x64/lib/python3.9/site-packages/aws_encryption_sdk/__init__.py", line 19, in <module>
    from aws_encryption_sdk.caches.local import LocalCryptoMaterialsCache  # noqa
  File "/opt/hostedtoolcache/Python/3.9.1/x64/lib/python3.9/site-packages/aws_encryption_sdk/caches/__init__.py", line 25, in <module>
    from ..internal.formatting.encryption_context import serialize_encryption_context
  File "/opt/hostedtoolcache/Python/3.9.1/x64/lib/python3.9/site-packages/aws_encryption_sdk/internal/formatting/__init__.py", line 14, in <module>
    from .serialize import serialize_header
  File "/opt/hostedtoolcache/Python/3.9.1/x64/lib/python3.9/site-packages/aws_encryption_sdk/internal/formatting/serialize.py", line 17, in <module>
    import aws_encryption_sdk.internal.defaults
  File "/opt/hostedtoolcache/Python/3.9.1/x64/lib/python3.9/site-packages/aws_encryption_sdk/internal/defaults.py", line 16, in <module>
    import aws_encryption_sdk.identifiers
  File "/opt/hostedtoolcache/Python/3.9.1/x64/lib/python3.9/site-packages/aws_encryption_sdk/identifiers.py", line 18, in <module>
    from cryptography.hazmat.primitives.asymmetric import ec, padding, rsa
  File "/opt/hostedtoolcache/Python/3.9.1/x64/lib/python3.9/site-packages/cryptography/hazmat/primitives/asymmetric/padding.py", line 10, in <module>
    from cryptography.hazmat.primitives.asymmetric import rsa
  File "/opt/hostedtoolcache/Python/3.9.1/x64/lib/python3.9/site-packages/cryptography/hazmat/primitives/asymmetric/rsa.py", line 20, in <module>
    from cryptography.hazmat.primitives.asymmetric.padding import AsymmetricPadding
ImportError: cannot import name 'AsymmetricPadding' from partially initialized module 'cryptography.hazmat.primitives.asymmetric.padding' (most likely due to a circular import) (/opt/hostedtoolcache/Python/3.9.1/x64/lib/python3.9/site-packages/cryptography/hazmat/primitives/asymmetric/padding.py)

[jwitko]

Turns out this was an issue in the Cryptography module. Issue was resolved in pyca/cryptography#5758

Our tests were failing using version 3.4 and the newly released 3.4.1 fixes the tests.