The following code works great for Python 3. It immediately outputs the user input to the console
import sys
for line in sys.stdin:
print (line)
Unfortunately, it doesn't seem to work for Python 2.7 and 2.6 (yes, i do change the print command) - it just wouldn't output my lines
Am i making some stupid mistake, or is there another way to make it work for lower versions of Python?
You can use iter and sys.stdin.readline to get the output straight away similar to the behaviour in python3:
import sys
for line in iter(sys.stdin.readline,""):
print(line)
The "" is a sentinel value which will break our loop when EOF is reached or you enter CTRL-D on unix or CTRL-Z on windows.
You can make this nicer for the user on Unix-like systems by importing readline, which gives you line editing capabilities, including history. But you have to use raw_input() (or input() on Python 3), rather than sys.stdin.readline().
import readline
while True:
try:
print raw_input()
except EOFError:
break
Hit CtrlD to terminate the program cleanly via EOF.
Ok, i found the solution here.
import sys
while 1:
try:
line = sys.stdin.readline()
except KeyboardInterrupt: # Ctrl+C
break
if not line: # EOF
break
print line, # avoid adding newlines (comma: softspace hack)
A bit messed up it is, innit? :)
Ctrl+C and this answer doesn't print unnecessary empty lines between each input line (print line, vs. print line)
print(line, end='')on Python 3 here (lineincludes the trailing newline unless it is EOF)