AttributeError: 'list' object has no attribute '__values__'

[renyhp]

I'm trying to test an API which I don't have access to yet. So I went to mockable.io and pasted a sample response I got from the API provider. Here is my mockable configuration:

Here is the WDSL generated by mockable.

Python code:

>>> import pretend
>>> from zeep import Client
>>> from zeep.transports import Transport
>>> client = Client('http://demo6341126.mockable.io/?wsdl')
>>> response = pretend.stub(
...     status_code=200,
...     headers={},
...     content=b"""<?xml version="1.0" encoding="utf-8"?>
... <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
...   <soap:Body>
...     <TestResponse xmlns="http://tempuri.org/">
...       <TestResult>
...         <Test>
...           <field>string</field>
...           <status>string</status>
...         </Test>
...         <Test>
...           <field>string</field>
...           <status>string</status>
...         </Test>
...       </TestResult>
...     </TestResponse>
...   </soap:Body>
... </soap:Envelope>""")
>>> operation = client.service._binding._operations['MyTestAction']
>>> result = client.service._binding.process_reply(
...    client, operation, response)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/renyhp/testzeep/venv/lib/python3.8/site-packages/zeep/wsdl/bindings/soap.py", line 231, in process_reply
    result = operation.process_reply(doc)
  File "/home/renyhp/testzeep/venv/lib/python3.8/site-packages/zeep/wsdl/bindings/soap.py", line 430, in process_reply
    return self.output.deserialize(envelope)
  File "/home/renyhp/testzeep/venv/lib/python3.8/site-packages/zeep/wsdl/messages/soap.py", line 122, in deserialize
    result = next(iter(result.__values__.values()))
AttributeError: 'list' object has no attribute '__values__'

If the response contains multiple TestResults with one Test each, zeep throws no error. But it goes without saying that I have no control over the API responses.

I'm running zeep v4.0.0.

[Marek-Wojtowicz]

My suggestion to correct the error:

diff --git a/src/zeep/wsdl/messages/soap.py b/src/zeep/wsdl/messages/soap.py
index 553bfa2..cda0cdb 100644
--- a/src/zeep/wsdl/messages/soap.py
+++ b/src/zeep/wsdl/messages/soap.py
@@ -119,6 +119,8 @@ class SoapMessage(ConcreteMessage):

         # Check if we can remove the wrapping object to make the return value
         # easier to use.
+        if not hasattr(result,'__values__'):
+            return result
         result = next(iter(result.__values__.values()))
         if isinstance(result, xsd.CompoundValue):
             children = result._xsd_type.elements