```shell
$ poetry run flake8 litellm/tests/test_prompt_factory.py
<unknown>:215: SyntaxWarning: invalid escape sequence '\/'
litellm/tests/test_prompt_factory.py:215:21: W605 invalid escape sequence '\/'
```
Fixed by making the string a raw string, which is equivalent:
```
$ python
Python 3.11.6 (main, Oct 25 2023, 19:49:20) [Clang 14.0.0 (clang-1400.0.29.202)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> "data:image\/jpeg;base64,1234" == r"data:image\/jpeg;base64,1234"
True
```
See: https://stackoverflow.com/questions/52335970/how-to-fix-syntaxwarning-invalid-escape-sequence-in-python
