在python中修改辅助prgm中的main prgm变量的正确方法

# 主程序
def main():
    main_variable = 10
    helper_program(main_variable)
    print(main_variable)  # 输出 10

# 辅助程序
def helper_program(variable):
    variable += 5

if __name__ == "__main__":
    main()

# 主程序
main_variable = 10

def main():
    helper_program()
    print(main_variable)  # 输出 15

# 辅助程序
def helper_program():
    global main_variable
    main_variable += 5

if __name__ == "__main__":
    main()