fix flake8; gitignore

Author: RitvikKapila

.gitignore

@@ -32,7 +32,10 @@ __pycache__
 # PyTest
 .pytest_cache
 # Ignore key materials generated by examples or tests
-test_keyrings
+user_public_key_file_name.pem
+user_private_key_file_name.pem
+my-encrypted-data.ct
+my-decrypted-data.dat
 
 # PyCharm
 .idea/

examples/src/keyrings/file_streaming_example.py

@@ -24,9 +24,9 @@
 For more information on how to use Raw AES keyrings, see
 https://docs.aws.amazon.com/encryption-sdk/latest/developer-guide/use-raw-aes-keyring.html
 """
+import filecmp
 import secrets
 import sys
-import filecmp
 
 from aws_cryptographic_materialproviders.mpl import AwsCryptographicMaterialProviders
 from aws_cryptographic_materialproviders.mpl.config import MaterialProvidersConfig