How to format the output string in Python using the format() function-Python Tutorial-php.cn

How to format the output string in Python using the format() function

PHPz

Release： 2017-04-02 13:46:52

Original

2727 people have browsed it

Python uses format()function to format the output string in Python
. The string is a class and you can use the method;

Python is completelyObject-oriented
language, everything is an object;

String parameters are represented by {NUM}, 0, represents the first parameter, 1, represents the second Parameters will be added sequentially;

Use ":" to specify the operations required to represent the element, such as ":.3" with three decimal places, ":8" occupying 8 character space, etc.;

You can also add specific letters, such as:

'b' - binary. Output the number in base 2.

'c ' - Character. Convert the integer

to the corresponding Unicode string before printing.

'd' - Decimal integer. Output the number in base 10.

'o' - Octal. Output the number in base 8.

'x' - Hexadecimal. Output the number in base 16. Use lowercase letters for digits above 9.

'e' - Power symbol. Use scientific notation to print numbers, use 'e' to represent power.

'g' - General format. Output the value in fixed-point format. When the value When it is particularly large, it is printed in power form.

'n' - number. When the value is an integer, it is the same as 'd'. When the value is a floating point number, it is the same as 'g'. The difference is that it will be based on The locale inserts a number separator.

'%' - Percent. Multiply the value by 100 and print it in fixed-point ('f') format, with a percent sign after the value.

Numbers (0, 1, ...) represent the elements in format(), so you can use "." to call the element method;

# -*- coding: utf-8 -*-
  
#====================
#File: abop.py
#Author: Wendy
#Date: 
#====================
  
#eclipse pydev, python3.3
  
age = 25
name = &#39;Caroline&#39;
  
print(&#39;{0} is {1} years old. &#39;.format(name, age)) #输出参数
print(&#39;{0} is a girl. &#39;.format(name))
print(&#39;{0:.3} is a decimal. &#39;.format(1/3)) #小数点后三位
print(&#39;{0:_^11} is a 11 length. &#39;.format(name)) #使用_补齐空位
print(&#39;{first} is as {second}. &#39;.format(first=name, second=&#39;Wendy&#39;)) #别名替换
print(&#39;My name is {0.name}&#39;.format(open(&#39;out.txt&#39;, &#39;w&#39;))) #调用方法
print(&#39;My name is {0:8}.&#39;.format(&#39;Fred&#39;)) #指定宽度

Copy after login

Output: ###

Caroline is 25 years old. 
Caroline is a girl. 
0.333 is a decimal. 
_Caroline is a 11 length. 
Caroline is as Wendy. 
My name is out.txt
My name is Fred.

Copy after login

The above is the detailed content of How to format the output string in Python using the format() function. For more information, please follow other related articles on the PHP Chinese website!