Python Day 6 学习

看完了列表和元组

time01 = time.time()  #起始时刻
a = ""
for i in range(1000000):
    a += "haha"

time02 = time.time()   #终止时刻

print("运算时间："+str(time02-time01))

time03 = time.time()   #起始时刻
li = []
for i in range(1000000):
    li.append("haha")

a = "".join(li)

运算时间：0.2531559467315674
运算时间：0.10252809524536133