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Treading The Right Path - Python

Now that you know how to create and use Python's tuples, listsand dictionaries, it's time to get your hands dirty. In this article, findout how to read from, and write to, files on the filesystem with built-inPython methods, and also take a look at some of the new features availablein Python 2.x.

  1. Python 101 (part 5): Snake Oil For The Soul
  2. Air In A Bottle
  3. Treading The Right Path
  4. Standing In Line
  5. Learning To Write
  6. Desperately Seeking Python
  7. String Theory
  8. Pop() Goes The Weasel
By: Vikram Vaswani, (c) Melonfire
Rating: starstarstarstarstar / 4
July 09, 2001

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You can specify a full path to the file as well:

>>> data = open("/tmp/snakeoil.txt") >>>
You could write a Python program that accomplishes the same thing:

#!/usr/bin/python # open file data = open("snakeoil.txt") # read file dump = data.read() print dump, "-- EOF -- EOF --" # clean up data.close()
And when you run this script, Python should return the contents of the file"snakeoil.txt", with a message at the end.

After years of research, scientists at AB Labs have come up with a radical new product, once that promises to improve the quality of life for humans and animals everywhere. We call it Air In A Bottle(tm), and we firmly consider it to be one of our best inventions ever. Carry it around with you (the bottle is titanium, the same material used in rocket ships, and the air is, well, air) and inhale from it whenever you need some air. Or give it to your friends as a present (after all, they need air too!) Air In A Bottle(tm). Get some today! -- EOF -- EOF --
Notice that since this is being run as a script and not via thecommand-line interpreter, the \012s are automatically converted into linebreaks.

And look what happens if the file doesn't exist:

>>> data = open("/tmp/nosuchfile.txt") Traceback (innermost last): File "", line 1, in ? IOError: [Errno 2] No such file or directory: '/tmp/nosuchfile.txt' >>>

>>> More Python Articles          >>> More By Vikram Vaswani, (c) Melonfire

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