Python in .format () common usage

format () formatted output

format ():% replace the traditional {} for the formatting output

format () common usage:

'{}{}'.format('123', '456')
>>>'123456' 

In fact, format () behind the content, fill in curly brackets

' Number 1} {2} {0} and { ' .format ( " 123 " , 456, ' 789 ' )
 >>> ' numbers 456789 and 123 '

# Note here that there are two braces, only one result output braces 
' digital {{1} {2} {0}}} and { ' .format ( " 123 " , 456, ' 789 ' )
 >>> ' digital {456789} and 123 '

# Allows two parameters a 
' {1} {1} {0} years ' .format ( ' where students ' , 18 ) 
 >>> ' 18 where students 18 years '

# By adding the keyword parameter 
' {name}} {Age years ' .format (Age = 18, name = ' where students ' ) 
 >>> ' where students 18 years '

 

The code also understand the need to understand format () these usages:

：	<Filling>	<Alignment>	<Width>	<，>	<Precision>	<Type>
Pilot symbols (hereinafter identified special format)	Character used to fill the (character)	> Align Right <Left ^ Center	Setting the groove width of the output (digital)	Figures for 1000 separator	Partial precision floating-point or decimal character length (eg: .3f setup packet leaving decimal places)	b: Binary c: Unicode d: Decimal o: Octal x: hexadecimal e: exponent %: Percentage form

 

Original Reference: https://www.cnblogs.com/runningCsnail/p/10452503.html