fix E721 violations (do not compare types using 'is')

Author: owenpearson

ably/util/crypto.py

@@ -153,7 +153,7 @@ def get_default_params(params=None):
     if not key:
         raise ValueError("Crypto.get_default_params: a key is required")
 
-    if type(key) == str:
+    if isinstance(key, str):
         key = base64.b64decode(key)
 
     cipher_params = CipherParams(algorithm=algorithm, secret_key=key, iv=iv, mode=mode)

test/ably/rest/restchannelpublish_test.py

@@ -423,7 +423,7 @@ async def check_data():
                 async def check_history():
                     history = await channel.history()
                     message = history.items[0]
-                    return message.data == expected_value and type(message.data) == type_mapping[expected_type]
+                    return message.data == expected_value and isinstance(message.data, type_mapping[expected_type])
 
                 await assert_waiter(check_history)