使用ebay-python-sdk动态添加ItemSpecifics遇KeyError问题求助

Hey there, let's sort out this issue you're facing with adding Item Specifics using the eBay Python SDK! The KeyError happens because you're trying to access myitem["Item"]["ItemSpecifics"] before it's been initialized in your myitem object, plus there's a small mistake in how you're structuring the NameValueList entries. Here's how to fix it step by step:

1. Understand the Root Causes #

• Missing nested structure: Your myitem object doesn't have the ItemSpecifics key under Item yet, so trying to append to its NameValueList throws a KeyError.
• Incorrect entry format: Each entry in NameValueList should be a single dictionary with both Name and Value keys, not two separate dictionaries wrapped in a list.

2. Correct Code Implementation #

First, we need to build out the required nested structure in myitem, then populate the Item Specifics properly:

# Initialize the Item section if it doesn't exist
if "Item" not in myitem:
    myitem["Item"] = {}

# Set up the ItemSpecifics structure with an empty NameValueList
myitem["Item"]["ItemSpecifics"] = {"NameValueList": []}

# Your original attributes array
a = [('Occasion', 'Casual'), ('Brand', 'Ralph Lauren'), ('Style', 'Polo Shirt')]

# Get reference to the NameValueList to make appending easier
name_value_list = myitem["Item"]["ItemSpecifics"]["NameValueList"]

# Loop through your attributes and add them correctly
for attr_name, attr_value in a:
    name_value_list.append({
        "Name": attr_name,
        "Value": attr_value
    })

# Now execute the verification call
api.execute('VerifyAddItem', myitem)

3. Why This Works #

• We first ensure the Item and ItemSpecifics keys exist in myitem before trying to use them, eliminating the KeyError.
• Each entry added to NameValueList follows eBay's required format: a single dictionary containing both the attribute name and its value, which matches what the API expects.

This should resolve the KeyError and properly format your Item Specifics for the VerifyAddItem call.

内容的提问来源于stack exchange，提问作者gerpaick