Using Python's suds to access the Web Service (SOAP) server is written by PHP

Soapphppythonweb Service

Want a system to be able to get data from another system.
The client system is written by Python, and the server is PHP.
Python-Side access

import sudsurl = 'http://www.xxxx.cn/soap/Service.php?wsdl'client = suds.client.Client(url)result = client.service.afunction(param1,param2)

The PHP server cache is closed.
I loop 1000 times a time result = Client.service.afunction (PARAM1,PARAM2)
Sometimes the 23rd time the call succeeds
Sometimes hundreds of times before it succeeds.
Occasionally, 1000 times, it's not successful.

Why is it so unstable that there are no parameters I have not set?

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