How can I get input in python without python's input?

Answer 1

Standard File Objects

Like many other languages, there are built-in file objects representing standard input, output, and error. These are in the sys module and are called stdin, stdout, and stderr. There are also immutable copies of these in __stdin__, __stdout__, and __stderr__. This is for IDLE and other tools in which the standard files have been changed.

You must import the sys module to use the special stdin, stdout, stderr I/O handles.

import sys

For finer control over input, use sys.stdin.read(). In order to implement the UNIX 'cat' program in Python, you could do something like this:

import sys for line in sys.stdin: print line,

Note that sys.stdin.read() will read from standard input till EOF. (which is usually Ctrl+D.)

Also important is the sys.argv array. sys.argv is an array that contains the command-line arguments passed to the program.

python program.py hello there programmer!

This array can be indexed,and the arguments evaluated. In the above example, sys.argv[2] would contain the string "there", because the name of the program ("program.py") is stored in argv[0]. For more complicated command-line argument processing, see the "argparse" module.