如何在Python的模块间调用生成的变量

# module1.py
def generate_variable():
    global my_variable
    my_variable = "Hello, World!"

# module2.py
import module1

module1.generate_variable()
print(module1.my_variable)  # 输出：Hello, World!

# module1.py
def generate_variable():
    my_variable = "Hello, World!"
    return my_variable

# module2.py
import module1

my_variable = module1.generate_variable()
print(my_variable)  # 输出：Hello, World!

# module1.py
def generate_variable():
    my_variable = "Hello, World!"
    with open("variable.txt", "w") as file:
        file.write(my_variable)

# module2.py
with open("variable.txt", "r") as file:
    my_variable = file.read()
print(my_variable)  # 输出：Hello, World!