|An Introduction to Python|
by Guido van Rossum and Fred L. Drake, Jr.
Paperback (6"x9"), 124 pages
RRP £12.95 ($19.95)
Sales of this book support the Python Software Foundation! Get a printed copy>>>
2.2.4 The Interactive Startup File
When you use Python interactively, it is frequently handy to have some standard commands executed every time the interpreter is started. You can do this by setting an environment variable named ‘PYTHONSTARTUP’ to the name of a file containing your start-up commands. This is similar to the ‘.profile’ feature of the UNIX shells.
This file is only read in interactive sessions, not when Python reads
commands from a script, and not when ‘/dev/tty’ is given as the
explicit source of commands (which otherwise behaves like an
interactive session). It is executed in the same namespace where
interactive commands are executed, so that objects that it defines or
imports can be used without qualification in the interactive session.
You can also change the prompts
If you want to read an additional start-up file from the current directory, you can program this in the global start-up file using code like this:
if os.path.isfile('.pythonrc.py'): execfile('.pythonrc.py')
If you want to use the startup file in a script, you must do this explicitly in the script:
import os filename = os.environ.get('PYTHONSTARTUP') if filename and os.path.isfile(filename): execfile(filename)
|ISBN 0954161769||An Introduction to Python||See the print edition|