Code quality improvements.

Author: chsou

c8y_api/model/operations.py

@@ -352,7 +352,7 @@ def operation_prototype(self) -> _DictWrapper:
 
     @operation_prototype.setter
     def operation_prototype(self, fragment):
-        self.__setitem__('operationPrototype', fragment)
+        self['operationPrototype'] = fragment
 
     @property
     def start_datetime(self) -> datetime:

integration_tests/conftest.py

@@ -70,7 +70,7 @@ def test_environment(logger):
 @pytest.fixture(scope='session')
 def live_c8y(test_environment) -> CumulocityApi:
     """Provide a live CumulocityApi instance as defined by the environment."""
-    if 'C8Y_BASEURL' not in os.environ.keys():
+    if 'C8Y_BASEURL' not in os.environ:
         raise RuntimeError("Missing Cumulocity environment variables (C8Y_*). Cannot create CumulocityApi instance. "
                            "Please define the required variables directly or setup a .env file.")
     return SimpleCumulocityApp()

integration_tests/test_apps.py

@@ -23,7 +23,7 @@ def fix_token_app(test_environment):
             'username': c8y.auth.username,
             'password': c8y.auth.password
         }
-    r = requests.post(url=c8y.base_url + '/tenant/oauth', data=form_data)
+    r = requests.post(url=c8y.base_url + '/tenant/oauth', data=form_data, timeout=60.0)
     # Obtain token from response
     assert r.status_code == 200
     cookie = r.headers['Set-Cookie']