Taking multiple integers on the same line as input from the user in python

I know how to take a single input from user in python 2.5:

raw_input("enter 1st number")

This opens up one input screen and takes in the first number. If I want to take a second input I need to repeat the same command and that opens up in another dialogue box. How can I take two or more inputs together in the same dialogue box that opens such that:

Enter 1st number:................
enter second number:.............