## Feature Format codes such as 'e', 'f', and 'g' are supported in format strings for integers in CPython, but not in RustPython ### in cpython ```py >>> f'{5:f}' '5.000000' ``` ### in RustPython ```py >>>>> f'{5:f}' Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: Unknown format code 'f' for object of type 'int' ``` ## Python Documentation https://docs.python.org/3/library/string.html#formatspec