@classmethod
def from_string(cls, dev_str):
    (first, last, salary, prog_lang) = dev_str.split('-')
    return cls(first, last, salary, prog_lang)
@classmethod
def from_string(cls, dev_str):
    (first, last, salary, prog_lang) = dev_str.split('-')
    return cls(first, last, salary, prog_lang)