Code refactor (#7923)

* Code refactor for general.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update restapi.py

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

utils/flask_rest_api/restapi.py

@@ -17,7 +17,7 @@ DETECTION_URL = "/v1/object-detection/yolov5s"
 
 @app.route(DETECTION_URL, methods=["POST"])
 def predict():
-    if not request.method == "POST":
+    if request.method != "POST":
         return
 
     if request.files.get("image"):