在python中修改两个文件之间的全局变量

# globals.py
shared_var = 10

# main.py
import globals

print(globals.shared_var)  # 输出 10
globals.shared_var = 20
print(globals.shared_var)  # 输出 20

# file_a.py
def modify_variable(var):
    var = var + 10
    return var

# file_b.py
from file_a import modify_variable

shared_var = 10
shared_var = modify_variable(shared_var)
print(shared_var)  # 输出 20

# file_a.py
def write_variable(var):
    with open('data.txt', 'w') as f:
        f.write(str(var))

def read_variable():
    with open('data.txt', 'r') as f:
        var = int(f.read())
    return var

# file_b.py
from file_a import read_variable, write_variable

shared_var = read_variable()
print(shared_var)  # 输出之前保存的值

shared_var = shared_var + 10
write_variable(shared_var)