[_flux]

You may find that actually making this code to use data from user-provided data will make the code look quite unnatural and I doubt it would be accidentally written.

For example:

    >>> user_data='{print("helo"}}'
    >>> print(user_data)
    {print("helo"}}
    >>> print(f"{user_data}")
    {print("helo"}}
    >>> print(f"user_data")
    user_data
    >>> print(user_data.format())
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    KeyError: 'print("helo"'

Maybe there's some other way to express this bug?

[Quekid5]

Yeah, that's why I was quite skeptical about the exact scenario... it would probably look very out of place, but I don't have enough RW experience in Python to say for sure.