How do I use raw input in Python 3

Question

import sys print sys platform  print 2  100  raw input     I am using Python 3 1 and can t get the raw input to  freeze  the dos pop-up  The book I m reading is for Python 2 5 and I m using Python 3 1  What should I do to fix this

User · Answer

As others have indicated  the raw input function has been renamed to input in Python 3 0  and you really would be better served by a more up-to-date book  but I want to point out that there are better ways to see the output of your script   From your description  I think you re using Windows  you ve saved a  py file and then you re double-clicking on it to run it  The terminal window that pops up closes as soon as your program ends  so you can t see what the result of your program was  To solve this  your book recommends adding a raw input   input statement to wait until the user presses enter  However  as you ve seen  if something goes wrong  such as an error in your program  that statement won t be executed and the window will close without you being able to see what went wrong  You might find it easier to use a command-prompt or IDLE   Use a command-prompt  When you re looking at the folder window that contains your Python program  hold down shift and right-click anywhere in the white background area of the window  The menu that pops up should contain an entry  Open command window here    I think this works on Windows Vista and Windows 7   This will open a command-prompt window that looks something like this       Microsoft Windows  Version 6 1 7601      Copyright  c  2009 Microsoft Corporation   All rights reserved       C  Users Weeble My Python Program gt     To run your program  type the following  substituting your script name        python myscript py      and press enter   If you get an error that  python  is not a recognized command  see http   showmedo com videotutorials video name 960000 amp fromSeriesID 96   When your program finishes running  whether it completes successfully or not  the window will remain open and the command-prompt will appear again for you to type another command  If you want to run your program again  you can press the up arrow to recall the previous command you entered and press enter to run it again  rather than having to type out the file name every time   Use IDLE  IDLE is a simple program editor that comes installed with Python  Among other features it can run your programs in a window  Right-click on your  py file and choose  Edit in IDLE   When your program appears in the editor  press F5 or choose  Run module  from the  Run  menu  Your program will run in a window that stays open after your program ends  and in which you can enter Python commands to run immediately

User · Answer

This works in Python 3 x and 2 x     Fix Python 2 x  try  input   raw input except NameError  pass print  Hi     input  Say something

User · Answer

Probably not the best solution  but before I came here I just made this on the fly to keep working without having a quick break from study   def raw input x     input x    Then when I run raw input  Enter your first name     on the script I was working on  it captures it as does input   would   There may be a reason not to do this  that I haven t come across yet

User · Answer

A reliable way to address this is  from six moves import input   six is a module which patches over many of the 2 3 common code base pain points

User · Answer

Timmerman s solution works great when running the code  but if you don t want to get Undefined name errors when using pyflakes or a similar linter you could use the following instead   try      import   builtin       input   getattr   builtin     raw input   except  ImportError  AttributeError       pass

User · Answer

How about the following one  Should allow you to use either raw input or input in both Python2 and Python3 with the semantics of Python2 s raw input  aka the semantics of Python3 s input    raw input isn t defined in Python3 x  whereas input wasn t behaving like raw input in Python 2 x   this should make both input and raw input work in Python 2 x 3 x like the raw input from Python 2 x  try  input   raw input except NameError  raw input   input

User · Answer

Here s a piece of code I put in my scripts that I wan t to run in py2 3-agnostic environment     Thank you  python2-3 team  for making such a fantastic mess with   input raw input  -  real raw input   vars   builtins    get  raw input  input    Now you can use real raw input  It s quite expensive but short and readable  Using raw input is usually time expensive  waiting for input   so it s not important   In theory  you can even assign raw input instead of real raw input but there might be modules that check existence of raw input and behave accordingly  It s better stay on the safe side

User · Answer

Starting with Python 3  raw input   was renamed to input     From What   s New In Python 3 0  Builtins section second item

[python] How do I use raw_input in Python 3

Use a command-prompt

Use IDLE

Examples related to python

Examples related to python-3.x