python-Common String Operations

name = ' Shanbaoliang.exe '

print (Name.capitalize ()) #将字符串首字母大写

print (Name.center, '-') #把字符串居中 and fills the number with a specific character
#-------------------Shanbaoliang-------------------

Print (Name.count (' Liang ')) #统计字符出现次数

Print (name.endswith (' exe ')) #判断字符串是否以XX结尾, returns TRUE or false

Print (Name.startswith (' Shan ')) #判断字符串是否以XX开头, returns TRUE or false

print (Name.upper ()) #大写所有字符
print (Name.lower ()) #小写所有字符

#字符串也可以根据下标

Print (Name.find (' K ')) #找到返回第一次出现的下标, could not find return-1
#print (Name.index (' K ')) #找到返回第一次出现的下标, error not found, not practical

print (Name.isdigit ()) #判断是否为纯数字, returns TRUE or false

print (Name.isidentifier ()) #判断是否是合法的变量名, returns TRUE or FALSE, not practical

print (Name.isspace ()) #判断是否全为空格, all returns True


aa= ' abc123 '
bb= ' abc123 single '

print (Aa.isalpha ()) #是否只有英文字母
print (Bb.isalnum ()) #是否只包含数字, English letter, Kanji, return true or False

cc= ' abcbbccaabc '
Dd=cc.strip (") #去掉字符串两边的东西, do not write by default remove spaces and line breaks
#print (DD)

#print (Cc.lstrip ()) #去掉左边字符
#print (Cc.rstrip ()) #去掉右边字符

Print (Cc.replace (' abc ', ' Leungo ', 1)) #字符串替换, replace ABC with Leungo, number means replace several times, do not write full replacement


ee= ' 5 '
Print (Ee.zfill (2)) #在前边补0, can be defined to complement a few 0

names= ""
SHANBL
Wangdz
ZHOUYF
Zhangz
Niuhy
" "
Import String
print (string.ascii_letters) #所有大小写字母
print (string.ascii_lowercase) #所有小写字母
print (string.ascii_uppercase) #所有大写字母
print (string.digits) #所有数字
print (string.punctuation) #所有特殊字符

#ctrl + Left view function source code

#布尔类型
#只有True和False两种类型

The string is converted into a list:

Import String #导入string函数
Print (String.digits.split ())
Nums=list (string.digits) #nums为字符串
Method 1:
Num=[]
For S in Nums:
    Num.append (s)
Method 1:
Nums = List (string.digits)
Method 3:
Print (Names.split ()) #1, split string 2, turn the string into a list, by default separated by spaces and line breaks

names= ' Shanbl,wangdz,zhouyf,zhangz,niuhy '
Print (Names.split (', ')) #不传 ', ' by default, splits only one element;

The list is converted into a string:
list1=[' SHANBL ', ' wangdz ', ' zhouyf ', ' zhangz ', ' Niuhy ']
Print ('/'. Join (List1)) #把list变成字符串, and concatenate with a character, return a string, Ps:join is a string method, note the usage

python-Common String Operations