Just the number

Product codes mix letters, dashes and digits. Write code_number(code) that returns the digits of the code, in order, as a single whole number. Every code has at least one digit. Leading zeros disappear, as they do for any number.

code_number("BRD-1042-A")  ->  1042
code_number("x7y")         ->  7
code_number("A007")        ->  7

def code_number(code):
    ...