LangChain - LangSmith Observability
Which of the following code snippets correctly accesses the total cost after running a LangChain chain with callback?
Which of the following code snippets correctly accesses the total cost after running a LangChain chain with callback?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Recall the callback object properties
The callback objectcbhas an attributetotal_costthat stores the cost.Step 2: Identify correct attribute access
Accessing it ascb.total_costis correct; the others are invalid or non-existent.Final Answer:
print(cb.total_cost) -> Option DQuick Check:
Access total_cost attribute = B [OK]
Quick Trick: Use cb.total_cost to get cost after run [OK]
Common Mistakes:
MISTAKES- Calling total_cost as a method instead of attribute
- Using camelCase instead of snake_case
- Trying to call a getter method that doesn't exist
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