def find_string_idx(self, match_s):
    strings = self.get_strings()
    for (i, s) in enumerate(strings):
        if (match_s == s.data):
            return i
    return (- 1)
def find_string_idx(self, match_s):
    strings = self.get_strings()
    for (i, s) in enumerate(strings):
        if (match_s == s.data):
            return i
    return (- 1)