使用Python Zeep处理多个WSDL失败的问题求助

Hey there! I’ve run into this exact scenario with Zeep before, so let’s walk through the most common causes and fixes for your result2 error when working with multiple WSDLs.

1. You’re Reusing a Single Zeep Client Instance #

Zeep’s Client class is designed to bind to one specific WSDL at a time. If you try to load a second WSDL into the same client (via client.load() or reinitializing), it will overwrite or conflict with the first WSDL’s definitions—this is almost certainly why result1 works but result2 fails.

Fix: Create Separate Client Instances for Each WSDL #

Instead of reusing one client, spin up a dedicated Client for every WSDL you need to interact with:

from zeep import Client

# Handle first WSDL with its own client
client1 = Client("http://your-first-wsdl-url.com/service?wsdl")
result1 = client1.service.your_first_method()

# Handle second WSDL with a completely separate client
client2 = Client("http://your-second-wsdl-url.com/service?wsdl")
result2 = client2.service.your_second_method()

2. Namespace or Service/Port Conflicts #

If your two WSDLs share overlapping namespaces, service names, or port names, Zeep might mix up type definitions or target the wrong endpoint for result2.

Fix: Explicitly Define Service and Port Names #

When creating the client for the problematic WSDL, specify the exact service_name and port_name to avoid ambiguity. You can find these values by inspecting the WSDL or using Zeep’s command-line tool:

# Use Zeep's CLI to list services/ports for your second WSDL
python -m zeep http://your-second-wsdl-url.com/service?wsdl

Then use those values when initializing the client:

client2 = Client(
    "http://your-second-wsdl-url.com/service?wsdl",
    service_name="YourSecondServiceName",
    port_name="YourSecondPortName"
)

3. Shared Transport/Session Issues #

If your two WSDLs require different authentication, proxies, or HTTP session configurations, reusing the default transport can cause connection or authorization errors for the second service.

Fix: Use Independent Transport Objects #

Create separate Transport instances for each client to isolate session settings:

from zeep import Client
from zeep.transports import Transport
import requests

# First client with default transport
transport1 = Transport()
client1 = Client("http://your-first-wsdl-url.com/service?wsdl", transport=transport1)

# Second client with custom session (e.g., different auth)
custom_session = requests.Session()
custom_session.auth = ("username", "password")
transport2 = Transport(http_session=custom_session)
client2 = Client("http://your-second-wsdl-url.com/service?wsdl", transport=transport2)

Bonus: Consider Upgrading Zeep (If Possible) #

Zeep 2.5.0 is a fairly old release (from 2019), and newer versions have fixed several edge cases around multiple WSDL handling. If your project constraints allow, upgrading to the latest stable version might resolve the issue outright:

pip install --upgrade zeep

Start with the first fix (separate clients)—it’s the most common culprit for this exact scenario. If that doesn’t work, move on to checking namespace conflicts or transport configurations.

内容的提问来源于stack exchange，提问作者Magomed Nakhaev