Getting user input

Question

I am running this   import csv import sys reader   csv reader open sys argv 0    rb    for row in reader      print row   And I get this in response     import csv     import sys     reader   csv reader open sys argv 0       rb        for row in reader          print row    gt  gt  gt     For the sys argv 0  I would like it to prompt me to enter a filename   How do I get it to prompt me to enter a filename

User · Accepted Answer

In python 3 x  use input   instead of raw input

User · Answer

sys argv 0  is not the first argument but the filename of the python program you are currently executing  I think you want sys argv 1

User · Answer

Use the following simple way to interactively get user data by a prompt as Arguments on what you want    Version   Python 3 X  name   input  Enter Your Name     print  Hello    name

User · Answer

To supplement the above answers into something a little more re-usable  I ve come up with this  which continues to prompt the user if the input is considered invalid   try      input   raw input except NameError      pass  def prompt message  errormessage  isvalid          Prompt for input given a message and return that value after verifying the input       Keyword arguments      message -- the message to display when asking the user for the value     errormessage -- the message to display when the value fails validation     isvalid -- a function that returns True if the value given by the user is valid             res   None     while res is None          res   input str message                if not isvalid res               print str errormessage              res   None     return res   It can be used like this  with validation functions   import re import os path  api key   prompt          message    Enter the API key to use for uploading            errormessage   A valid API key must be provided  This key can be found in your user profile           isvalid   lambda v   re search r     -   -  4   -     v    filename   prompt          message    Enter the path of the file to upload            errormessage   The file path you provided does not exist           isvalid   lambda v   os path isfile v    dataset name   prompt          message    Enter the name of the dataset you want to create            errormessage   The dataset must be named           isvalid   lambda v   len v   gt  0

User · Answer

Use the raw input   function to get input from users  2 x    print  Enter a file name    filename   raw input     or just   filename   raw input  Enter a file name       or if in Python 3 x   filename   input  Enter a file name

[python] Getting user input

Examples related to python

Examples related to user-input