A Python string

The encoding of strings in Python3 is Unicode. This means that the string can support Chinese.

Print (' Chinese ') #中文

There are many ways to manipulate strings in Python.

Capitalize first letter capital

name = ' Alex ' Print (Name.capitalize ()) #Alex

CountCount the number of characters in a string

name = ' Alex ' Print (Name.count (' a ')) #1

CenterReturns the center of an original string and fills it with the specified character to the length

name = ' Alex ' Print (Name.center, '-') #--------Alex--------

EndsWithDetermines whether a string ends with a specified character

name = ' Alex ' Print (Name.endswith (' ex ')) #True

Expandtabs to turn a newline in a tab into a space of a specified length

name = ' Hello \talex ' Print (Name.expandtabs (tabsize=30)) #hello                         Alex

Find string Lookup returns the position of the string to find in the search string

name = ' Hello Alex ' Print (Name.find (' Alex ')) #6

Format formatted output

name = ' My name is {name} ' Print (Name.format (name= ' Alex ')) #my name is Alex

Format_map formatted output a dictionary is passed.

name = ' My name is {name} ' Print (Name.format_map ({' name ': ' Alex '}) "#my name is Alex

Isalnum to determine whether a string is only Arabic letters or numbers

name = ' My name is {name} ' Print (Name.isalnum ()) #Falsename1 = ' 1mynameisname ' Print (Name1.isalnum ()) #True

Isalpha determines whether a string is a plain English character

name1 = ' 1mynameisname ' Print (Name1.isalpha ()) #Falsename2 = ' mynameisname ' Print (Name2.isalpha ()) #True

IsDigitDetermines whether a string is an integer

name2 = ' mynameisname ' Print (Name2.isdigit ()) #Falsename3 = ' 222 ' Print (Name3.isdigit ()) #True

IslowerDetermine if a string is lowercase

name2 = ' My name is Alex ' Print (Name2.islower ()) #Falsename3 = ' My name is Alex ' Print (Name3.islower ()) #True

Join turns a list into a string and splits it by the specified delimiter

Print (', '. Join ([' 1 ', ' 2 ', ' 3 ')) #1, 2,3

Lower uppercase to lowercase

Print (' ALEX '. Lower ()) #alex

Upper lowercase to uppercase

Print (' Alex '. Upper ()) #ALEX

Lstrip to the left space or carriage return

Print (' \nalex '. Lstrip ()) #alex

Rstrip go to the right or enter the blanks

Print (' alex\n '. Rstrip ()) #alex

Strip go to either side space or enter

Print (' \nalex\n '. Strip ()) #alex

Translate

Grammar:

Str.translate (table[, Deletechars]);

The Python translate () method converts the character of a string according to the table given by the parameter table (containing 256 characters), and the character to be filtered out is placed in the Del parameter.

A = Str.maketrans (' abcdef ', ' 123456 ') print (' Alex Li '. Translate (a)) #1l5x Li

Replace string substitution

Print (' Alex '. Replace (' A ', ' B ')) #blex

Split string Split list

Print (' Alex_li '. Split ('_')) #[' Alex ', ' Li ']

Splitlines split string to list by line break

Print (' Alex\nli '. Splitlines ()) #[' Alex ', ' Li ']

A Python string