str_to_felt("pepe token") file "<stdin>", line 1, in <module> nameError: name 'str_to_felt' is not defined

Question

This is an unexpected error: str_to_felt("Pepe Token") : File "", in Line 1, in NameError: name 'str_to_felt' is not defined

I haven't tried anything else. The error is not supposed to occur.I am supposed to get an identifying number for my python utility