Paging output from print statement

Question

I\'m essentially trying to achieve this:

>>>print \"SOME_VERY_LONG_TEXT\" | more

Of course, it doesn\'t work in Python 2.7(IDLE).

Answer 1

Writing something terminal and os independent might be a bigger task.

But if you can get the height of the terminal then you can use something like this this Assuming your input is a generator/list of line seperated text, or else you can call text.split('\n') before calling this function

def pagetext(text_lined, num_lines=25):
   for index,line in enumerate(text_lined):
       if index % num_lines == 0 and index:
           input=raw_input("Hit any key to continue press q to quit")
           if input.lower() == 'q':
               break
       else:
           print line

Also there is a pager module on pypy haven't used it but the author says it was supposed to be included in the standard library.

Answer 2

You could call it as an external process. (You have to be careful with shell=True, though.)

import subprocess
longStr = 'lots of text here'
subprocess.call(['echo "'+longStr+'" | more'], shell=True)

Answer 3

Although a bit late, the following worked for me:

def less(data):
    process = Popen(["less"], stdin=PIPE)

    try:
        process.stdin.write(data)
        process.communicate()
    except IOError as e:
        pass