"Python Cookbook" "String and Text" 13. Aligning the string

Problem: Formatting text in some sort of alignment

Solution:

1. For string: Ljust (), Rjust (), center () method

2, for any value, more general: Format () more content: Https://docs.python.org/3/library/string.html#formatspec

>>> text='Hello World'>>> Text.ljust (20)'Hello World'>>> Text.rjust (20)'Hello World'>>> Text.center (20)'Hello World'>>> Text.ljust (20,'=')'Hello world========='>>> Text.rjust (20,'*')'*********hello World'>>> Text.center (20,'+')'++++hello world+++++'>>>

Format ():

Format qualifier

It has a rich "format qualifier" (syntax is {} with:), such as:

Fill and align
Padding is used in conjunction with alignment
^, <, > center, Align Left, right, back with width
: The fill character after the number, only one character, not specified by default is filled with a space

Accuracy and type F
Accuracy is often used in conjunction with Type F

Other types
Mainly in the system, B, D, O, X are binary, decimal, octal, hexadecimal.

Use, the number can also be used to make the amount of thousands separator.

>>> Format (text,'>20')'Hello World'>>> Format (text,'<20')'Hello World'>>> Format (text,'^20')'Hello World'>>> Format (text,'*>20')#other padding characters that are extra empty can be specified before the alignment'*********hello World'>>> Format (text,'=<20')'Hello world========='>>> Format (text,'%^20')'%%%%hello world%%%%%'>>>#when multiple values are formatted, the formatting code code can be used in the format () method>>>'{: >10} {: >10}'. Format ('Hello',' World')'Hello World'

>>>‘{: >10} {:%^10}‘. Format(‘Hello' ,'World')' Hello%%world%%%'>>> '{: #<10} {:%^10} '. Format('Hello','World')'hello#####%%world%%% '                    >>>'{: <20}'. Format ('Hello World')'Hello World'>>>'{:* <20}'. Format ('Hello World')'Hello world*********'>>>'{: ^20}'. Format ('Hello World')'Hello World'>>>

"Python Cookbook" "String and Text" 13. Aligning the string