fstring_conv.py

class MyClass:

    def __repr__(self) -> str:
        return 'My Class Repr'

    def __str__(self) -> str:
        return 'My Super Class'

    def __format__(self, __format_spec: str) -> str:
        return 'My Formatted Class'


mc = MyClass()
print(f"Usual format call: {mc}")
## 'Usual format call: My Formatted Class'
print(f"Force str: {mc!s}")
## 'Force str: My Super Class'
print(f"Force repr: {mc!r}")
## 'Force repr: My Class Repr'