String to Int

string_to_int.py

class Solution:

    def __init__(self):
        
        self.numeric_set = [str(i) for i in range(10)]
        self.allowed_set = self.numeric_set
        self.allowed_set.append("-")
        


    def myAtoi(self, s: str) -> int:

        s_list = list(s)
        out_str_list = []

        for e in s_list:
            if e in self.allowed_set:
                out_str_list.append(str(e))

        out_str = ''.join(str(i) for i in out_str_list)

        return int(out_str)