Command line input in Python

Question

Is it possible to run first the program then wait for the input of the user in command line  e g   Run     Process     Input from the user in command line form      Process

User · Answer

If you re using Python 3  raw input has changed to input  Python 3 example   line   input  Enter a sentence

User · Answer

Start your script with the following line  The script will first run and then you will get the python command prompt  At this point all variables and functions will be available for interactive use and invocations      usr bin env python -i

User · Answer

It is not at all clear what the OP meant  even after some back-and-forth in the comments   but here are two answers to possible interpretations of the question   For interactive user input  or piped commands or redirected input   Use raw input in Python 2 x  and input in Python 3    These are built in  so you don t need to import anything to use them  you just have to use the right one for your version of python    For example   user input   raw input  Some input please       More details can be found here   So  for example  you might have a script that looks like this    First  do some work  to show -- as requested -- that   the user input doesn t need to come first  from   future   import print function var1    tok  var2    tik  var1 print var1  var2     Now ask for input user input   raw input  Some input please       or  input  Some     in python 3    Now do something with the above print user input    If you saved this in foo py  you could just call the script from the command line  it would print out tok tiktok  then ask you for input   You could enter bar baz  followed by the enter key  and it would print bar baz   Here s what that would look like     python foo py tok tiktok Some input please  bar baz bar baz   Here    represents the command-line prompt  so you don t actually type that   and I hit Enter after typing bar baz when it asked for input   For command-line arguments  Suppose you have a script named foo py and want to call it with arguments bar and baz from the command line like    foo py bar baz    Again    represents the command-line prompt    Then  you can do that with the following in your script   import sys arg1   sys argv 1  arg2   sys argv 2    Here  the variable arg1 will contain the string  bar   and arg2 will contain  baz    The object sys argv is just a list containing everything from the command line   Note that sys argv 0  is the name of the script   And if  for example  you just want a single list of all the arguments  you would use sys argv 1

User · Answer

Just Taking Input  the input   raw input  Enter input       And that s it     Moreover  if you want to make a list of inputs  you can do something like   a       for x in xrange 1 10       a append raw input  Enter Data        In that case  you ll be asked for data 10 times to store 9 items in a list   Output    Enter data  2 Enter data  3 Enter data  4 Enter data  5 Enter data  7 Enter data  3 Enter data  8 Enter data  22 Enter data  5  gt  gt  gt  a   2    3    4    5    7    3    8    22    5     You can search that list the fundamental way with something like  after making that list    if  2  in a      print  Found    else      print  Not found    You can replace  2  with  raw input    like this   if raw input  Search for     in a      print  Found  else       print  Not found    Taking Raw Data From Input File via Commandline Interface  If you want to take the input from a file you feed through commandline  which is normally what you need when doing code problems for competitions  like Google Code Jam or the ACM IBM ICPC    example py  while True       line   raw input       print  input data   s    line   In command line interface   example py  lt  input txt   Hope that helps

[python] Command line input in Python

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