python text Strings are reversed character by character and word by word

python text Strings are reversed character by character and word by word

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Strings are reversed character by character and word by word

Let's start with the character-by-character inverse of strings, and since python provides a very useful slice, you only need one sentence to do it

  >>> a='abc edf degd'  
  >>> a[::-1]  
  'dged fde cba'  
  >>>   

Then we'll look at the word inverse

1. We can also use slices

  >>> a='abc edf degd'  
  >>> a.split ()[::-1]  
  ['degd', 'edf', 'abc']  

2. You can use the native method reverse

  >>> a='abc edf degd'  
  >>> result=a.split()  
  >>> result  
  ['abc', 'edf', 'degd']  
  >>> result.reverse()  
  >>> result  
  ['degd', 'edf', 'abc']  
  >>> result=' '.join (result)  
  >>> result  
  'degd edf abc'  
  >>>   

During the inverse, I was surprised to find another way to use join

  >>> a='abcd'  
  >>> ' '.join (a)  
  'a b c d'  
  >>> a='abc edf degd'  
  >>> ' '.join (a)  
  'a b c   e d f   d e g d'  
  >>>   

It can quickly add our assigned characters to the middle of each character

  >>> '+'.join (a)  
  'a+b+c+ +e+d+f+ +d+e+g+d'  
  >>>   

In summary, or the best way to use seing, the most recommended use