Confirm this is an issue with the Python library and not an underlying OpenAI API

• This is an issue with the Python library
  To pick up a draggable item, press the space bar. While dragging, use the arrow keys to move the item. Press space again to drop the item in its new position, or press escape to cancel.

Describe the bug

The issue is that the base_url in the OpenAI client enforces a trailing slash whereas setting the module openai.base_url does not enforce.

This is 100% reproducible and while it can be worked around, the inconsistency in clients causes issues in scripts that use both clients.

To Reproduce

1. Create a module client and use a base_url without a trailing slash. See error with URL for completions
2. Create an OpenAIClient and use a base_url without a trailing slash. See no erros.

Code snippets

This works

    client = openai.OpenAI(
        api_key=my_key,
        base_url="https://myllmserver.com/api/v1"
    )
    print(client.completions.create(
       model="mistralai/Mistral-7B-Instruct-v0.2",
       prompt="test" 
    ))

This does not:

    openai.base_url="https://myllmserver.com/api/v1"
    openai.api_key=my_key
    print(openai.completions.create(
       model="mistralai/Mistral-7B-Instruct-v0.2",
       prompt="test"
    ))

Error:

https://myllmserver.com/api/v1completions "HTTP/1.1 404 Not Found"

OS

macOS

Python version

Python v3.12

Library version

openai v1.23.6