How webservice interface to the type of treatment? Suds class module using a package

JSON Import 
from suds.client Import Client 


class HandleWebservice: 
    '' ' 
    defines a webservice interface processing type of class 
    '' ' 
    DEF the __init __ (Self, send_msg_url, api_name): 
        ' '' 
        constructor 
        : param send_msg_url: Interface Address 
        : param api_name: Interface name 
        '' ' 
        self.api_name = api_name 
        self.client = Client (send_msg_url) 

    DEF api_res (Self, data): 
        ' '' 
        request processing method 
        : param data: type of dictionary data request body 
        : return: json data format type str 
        '' ' 
        the try: 
            # stepped on a pit, where a one-time conversion directly if in place, because then the order of execution, will first incoming data
            # 错误的处理办法：res = eval(f"self.client.service.{self.api_name}({data})")
            res = f"self.client.service.{self.api_name}(data)"
            res = eval(res)
            res_str = json.dumps(dict(res))
            return res_str
        except Exception as e:
            res = e
            res_str = json.dumps(dict(res.fault), ensure_ascii=False)
            return res_str