我有一个variables.py带钥匙的文件TOKEN= 123456。我需要在需要时动态更新该值。

文件Constants.py读为：

#!/usr/bin/env python
# encoding: utf-8
"""
variables.py
"""

TOKEN= 50

和 refresh_tok.py

#!/usr/bin/env python
# encoding: utf-8
"""
refresh_tok.py
"""
import variables

def refresh_token():
    print(variables.TOKEN) // previous value 50
    change_constant(variables.TOKEN, 100)
    print(variables.TOKEN) // value I am expecting is 100 but it says 50


def change_constant(match_string, replace_string):
    read_file = open("variables.py", "rt")
    read_data = read_file.read()
    read_data = read_data.replace(match_string, replace_string)
    read_file.close()
    
    write_file = open("variables.py", "wt")
    write_file.write(read_data)
    write_file.close()

我在refresh_tok.py的第二个打印语句中期望的值是100，但它仍在以前的值上，先打印50，然后再打印100。