09for循环的优化

#___author:  
#date: 2021/6/10
#循环代码优化测试
import time
s = time.time()
for i in range(1000):
    b=[]
    for m in range(10000):
        b.append(i*1000+m*100)
d = time.time()
print("耗时:{}".format(d-s))
s1 =time.time()
for i in range(1000):
    b=[]
    c=i*1000
    for m in range(10000):
        b.append(c+m*100)
d1 = time.time()
print("耗时:{}".format(d1-s1))