CODEWITHSUNDEEP
python
sudipt dabral
sudipt dabral

Reputation: 1485

Provide stdin input from file in cmd?

I am creating a file input.txt to store my input and while running my py script file from cmd. I want it to take input from that file, just like we can do something like that in c++.

a.exe < input.txt

How can we do something similar in python?

Upvotes: 1

Views: 4181

Answers (6)

tdelaney
tdelaney

Reputation: 77377

Python works the same way. a.py < input.txt and python a.py < input.txt both work. You can read the file with sys.stdin or the input() function.

Upvotes: 5

Sayandip Dutta
Sayandip Dutta

Reputation: 15872

A simple input() with < filename would do: for program:

x, y = input().split(',')
print(x, y)

In shell:

username:/home/path$ python test.py < input.txt
1 2

Upvotes: 0

Brian61354270
Brian61354270

Reputation: 14434

The line a.exe < input.txt is a command to the shell. This method of running an executable will work regardless of what language a.exe was written in.

To send the contents of intput.txt to a python script, simply run it with

python a.py < input.txt

The contents of stdin may then be accessed via sys.stdin.

For example, a.py might read

import sys


contents = sys.stdin.read()
print(contents)

which will print the contents of input.txt verbatim to stdout.

Upvotes: 0

bashBedlam
bashBedlam

Reputation: 1500

I think this is what you're looking for :

import sys

variable_string = sys.stdin.readline ()
print (variable_string)

Upvotes: 0

totalMongot
totalMongot

Reputation: 178

I hope this could help you to handle inputs in python from a textfile:

with open("File_name.txt", "r") as file:
       for line in file:
              #Do something with the line in the file

This link could help you.

Upvotes: 0

Data_Is_Everything
Data_Is_Everything

Reputation: 2017

With the main code ready to use once you extract the input, this is the code for doing the extraction of the input from input.txt:

with open("input.txt", "r") as file:
    lines = file.readlines()

for line in lines:
  storeInput = line

....

what ever the next piece of code would be to use the input from file.

So just working with the input.

Upvotes: 0

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