您可以使用setattr(self，my_field_name，value)来实现.

You can use setattr(self, my_field_name, value) to achieve this.

for field in ['first_name', 'last_name']: 
    value = getattr(self, field)
    setattr(self, field, value.title())

由于字符串在Python中是不可变的，因此您将无法就地修改值.

You won't be able to modify the value in-place as strings are immutables in Python.