如何访问函数中的全局变量

global global_variable
global_variable = 10

def my_function():
    global global_variable
    print(global_variable)

my_function()  # 输出：10

global_variable = 10

def my_function(variable):
    print(variable)

my_function(global_variable)  # 输出：10

# global_variables.py
global_variable = 10

# my_function.py
import global_variables

def my_function():
    print(global_variables.global_variable)

my_function()  # 输出：10