Python string input/output

This article shares a detailed introduction to string input and output in Python strings.

Python generally uses two input methods,input()Andraw_input()The difference is that the former can only enter numbers, and the latter can input strings, using the following:

In [226]: help(input)Help on built-in function input in module __builtin__:input(...)    input([prompt]) -> value    Equivalent to eval(raw_input(prompt)).In [228]: input()d---------------------------------------------------------------------------NameError                                 Traceback (most recent call last)
 
   in 
  
   ()----> 1 input()
   
     in 
    
     ()NameError: name 'd' is not definedIn [229]: input()23Out[229]: 23In [230]: input("input a num")input a num444Out[230]: 444In [231]: n = input()23In [232]: nOut[232]: 23In [233]: s = raw_input("input sth.: ")input sth.: 123In [234]: sOut[234]: '123'In [235]: s = raw_input("input sth.: ")input sth.: sssIn [236]: sOut[236]: 'sss'
    
   
  
 

String output

Output usageprintYou can add variables to the backend. you can also use ", ', and ''' to include strings. The following is an example:

• It can be used normally. one type can contain one string, and the other type can be included in the string (but the same type cannot be included; otherwise, it must be escaped)

In [241]: print "I'm Tom" I'm TomIn [242]: print 'ABC' abcIn [243]: print "abc" abcIn [244]: print '''abc''' abcIn [245]: print '"hhh"' "hhh" In [246]: print "'Hello World'" 'hello world' In [247]: print 'I am bt 'file"
 
  
", Line 1 print 'I am bt' ^ SyntaxError: invalid syntax # string escape In [248]: print 'I \ 'mbt' I'm btIn [249]: print ''' I'm tom, "hhhe" ''' I'm tom, "hhhe"
 

• Line Feed

In [250]: print ''' I .....: am tom .....: hhha ''' iam tomhhhaIn [254]: print 'I am \.....: tom \.....: hh 'I am tom hhIn [255]: print "I \.....: am \ n \.....: tom \ n "iam tom # empty line # output non-escape string In [256]: print r" I \'m Tom "I \'m Tom

Numeric string conversion

Direct usestr()Orint()There is nothing to say, as shown below:

In [256]: print r"I\'m Tom"I\'m TomIn [257]: n = raw_input()123In [258]: nOut[258]: '123'In [259]: n = int(n)In [260]: nOut[260]: 123In [261]: str(n)Out[261]: '123'

The above is a detailed introduction to Python string input and output. For more information, see other related articles in the first PHP community!