[Python] OpenAI API: openai.api_key = os.getenv() not working

I am just trying some simple functions in Python with OpenAI APIs but running into an error:

I have a valid API secret key which I am using.

Code:

>>> import os
>>> import openai
>>> openai.api_key = os.getenv("I have placed the key here")
>>> response = openai.Completion.create(model="text-davinci-003", prompt="Say this is a test", temperature=0, max_tokens=7)




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