In my case it worked with updating my open ai.
First I ran the command to check my openai version which was 0.23.1 or something (use command pip show openai in command prompt or !pip show openai in jupyter lab.
Then I ran !pip install --upgrade openai in jupyter lab (remove ! when running in command prompt).
after that I ran the command and worked for me.
openai.api_key = “sk-…”
response = get_completion(prompt)
Man you just saved me a ton of time. That was my problem.
thanks you so much, that was the error in my code 
upgrade your openai package pip install --upgrade openai or uninstall openai pip uninstall openai then install newly pip install openai
if you are using chat gpt more than 3 months then the attribute error is arising because of exceed limit for usage, so open new open ai account which can help to ressolve the problem
Dude I dont know how or why that worked but hell yeah it did, just changed my main file from openai.py to _openai.py, ran it and holy * it ran.
+1 thank you for this, was getting rather too confused!
Thank you! Saved me a lot of searching!
Thank you. This solved my problem. 
I faced the same problem while using a venv environment. Then realised by openai --version that the openai version was 0.19.0. So, did pip install --upgrade openai and then the openai library version was upgraded to 0.27.8. Updated the requirements.txt file with openai=0.27.8. Solved !
I changed my Python interpreter to 3.9 and open ai version to 0.27.8, and now it’s working completely fine (Initially, my interpreter was set to 3.10, giving me the same stated error).
Hey i created a file named openai.py just to save some code and was getting the same error. your comment helped alot. Thanks for helping people like us.
Geez, this was me since I was just doing a quick test with it. Thank you.
I tried everything shown here but still I’ m getting the same result “partially initialized module ‘openai’ has no attribute ‘Completion’ (most likely due to a circular import)” what to do can please someone help me
I was using the quickstart example and I had to go into the terminal and run
pip install --upgrade openai
turns out I was on 0.19 which is weird because I remember I had to re-install openai because there was an error. I assumed it would’ve just installed the latest version but it didn’t. Then I ran the upgrade command and mine works. Currently as of
openai==0.27.8
Thanks a ton! This was my exact problem. Seems that it’s a openai file which got overridden. Could never think of it! It was driving me crazy. Also, welcome all the similar minds who named their file to openai.py 
Had the same problem, solved by pip install openai==0.27.8 Many thanks for all!
Hello Sam683, your classic answer resolved my openai AttributeError. A Million Thanks to you Sir!
First uninstall openai package using pip uninstall openai and then reinstall using pip install openai. Also make sure to remove/update the openai package from the virtual env, if you are using one. I has openai in my virtual env and removing and upgrading it worked!
Dude! Thank you thank you thank you! You saved my weekend.