如何从字符串值中仅设置整数？

string_value = "123"
integer_value = int(string_value)

import re

string_value = "123abc"
match = re.search(r'\d+', string_value)
if match:
    integer_value = int(match.group())

string_value = "123"
integer_value = int(string_value)

# index.py
def main_handler(event, context):
    string_value = event.get("string_value")
    if string_value:
        try:
            integer_value = int(string_value)
            return {"integer_value": integer_value}
        except ValueError:
            return {"error": "Invalid input"}
    else:
        return {"error": "Missing input"}