[Solved] What is wrong with this code?passthrough = RunnablePassthrough() result = passthrough.invoke(5, 10) — Ans: invoke expects only one argument, but two were given | LangChain

LangChain - Chains and LCEL

What is wrong with this code?

passthrough = RunnablePassthrough()
result = passthrough.invoke(5, 10)

Ainvoke expects only one argument, but two were given

BRunnablePassthrough cannot be instantiated directly

Cinvoke method does not exist on RunnablePassthrough

DThe input must be a string, not integers

Step-by-Step Solution

Solution:

Step 1: Check invoke method signature
invoke expects a single input argument to pass through.
Step 2: Identify extra argument
Code passes two arguments (5, 10), causing an error.
Final Answer:
invoke expects only one argument, but two were given -> Option A
Quick Check:
invoke takes one input argument [OK]

Quick Trick: invoke takes exactly one input argument [OK]

Common Mistakes:

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