Python05-09_字符串的分割与合并

1 a = "to be or not to be"
2 a = a.spilt()
3 print(a)
4 [‘to‘,‘be‘,‘or‘,‘not‘,‘to‘,‘be‘]

1 a = [‘wo‘,‘ai‘,‘ni‘]
2 a = ‘*‘.join(a)
3 print(a)
4 ‘wo*ai*ni‘

 1 a = ""
 2 import time
 3 time01 = time.time()
 4 for i in range(10000000):
 5      a+= "sxt"
 6 time02 = time.time()
 7 print("时间:"+str(time02 - time01))
 8 
 9 time03 = time.time()
10 li = []
11 for i in range(10000000):
12      li.append("sxt")
13 
14 a="".join(li)
15 
16 time04 = time.time()
17 print("时间:"+str(time04 - time03))