python中利用time模块，计算一段代码运行的时间。

import time                        # 导入time模块
start_time = time.time()           # 记录代码开始时间
for i in range(10000000):
    a = 1 + 1
end_time = time.time()             # 记录代码结束时间
run_time = end_time - start_time   # 计算运行时间
print('run_time: ', run_time)


输出为：
run_time:  0.9901573657989502
Process finished with exit code 0