What does sys.stdin read?

Question

I get how to open files, and then use Python\'s pre built in functions with them. But how does sys.stdin work?

for something in sys.stdin:
    some stuff he         


        

Answer 1

To get a grasp how sys.stdin works do following:

create a simple python script, let's name it "readStdin.py":

import sys
lines = sys.stdin.readlines()
print (lines)

Now open console any type in:

echo "line1 line2 line3" | python readStdin.py

The script outputs:

['"line1 line2 line3" \n']

So, the script has read the input into list (named 'lines'), including the new line character produced by 'echo'. That is.