def handle_request_parsing_error ( err , req , schema , error_status_code , error_headers ) : abort ( error_status_code , errors = err . messages )
python flask api post 400
webargs error handler that uses Flask - RESTful s abort function to return a JSON error response to the client .
def handle_request_parsing_error(err, req, schema, error_status_code, error_headers):
    """webargs error handler that uses Flask-RESTful's abort function to return
    a JSON error response to the client.
    """
    abort(error_status_code, errors=err.messages)