字串常用操作

1

常用：分割、長度、索引、切片
2 r = (1,2,3,4,5)#
唯讀列表元組
3 name = "
liangml"4
strip
5 username = input("
user:")
6if username.strip() == "
liangml
":#strip可以將輸入前後的空格都換掉
7print("
welcome")
89split
10 names = "
liangml
","tom
","jack
"11 name2 = names.split("
,")#
split是names拆分開來（得到乙個列表）
12print("
|".join(name2))#
join是將name2結果以|形式合併到一起
1314
print(""
in name)#
有沒有空格
1516
capitalize
17print(name.capitalize())#
capitalize是將名字的首字母大寫
1819
format20#
format字串兩種賦值方式
21 msg = "
hello,,it's been a long  since last time sopke...."22
#msg2 = msg.format(name="zhangsan",age=111)23#
print(msg2)
24 msg2 = "
lisi,dddd"25
print(msg2.format("
liangml
",22))
2627
center
28print(name[2:4])
29print(name.center(40,"
-"))#
center可以指定長度,將字串兩邊的長度均勻的分開
3031
find
32print(name.find("
a"))#
find查詢賦值中有幾個包含字串
3334
isdigit
35 age = input("
your age:")
36if age.isdigit():#
isdigit判斷他是否為數字
37     age =int(age)
38else:39
print("
invalid data type")
4041
isalnum
42 name = "
liangml!dfs"43
print(name.isalnum())#
不容許複製裡面有特殊字元
4445
endswith、startswith
46print(name.endswith("
dfsd"))
47print(name.startswith("
dfsfds"))
4849
upper、lower
50print(name.upper().lower())#
upper賦值全部大寫，lower全部變小

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