Solved

Edit/read configuration text file within Python

Posted on 2007-12-04
3
2,793 Views
Last Modified: 2012-06-22
Hello,

I am trying to save/read a configuration file from within Python. Here is the situation I am in:

Currently, I am working on a script under Linux, in Python. I want to be able to save some configuration to a file like config.txt. This file would be located in a location similar to:
    /home/[user]/.[application]/config.txt
I also want the Python script to be able to be run from anywhere, eg, from the Desktop, home folder, or any other folder and save and read from the same location.

After some research, I have found that I can use the following code to open a file: f = open("config.txt","w")

The problem is that I can't specify a location. The following code:
    f = open("~/.[program]/config.txt","w")
does not work, because it does not accept ~/

I cannot give a relative address (like .[program]/config.txt if the script was located in the home directory), as the script could be run from anywhere within the users home directory.

I cannot give a full address (not that I am aware of), because I need to have a dynamic username for the [user] field in "/home/[user]/.[program]/config.txt", and I am not aware of how to get the current users username, if it is possible.

What is the best way to save and read the configuration file, if the python script is located anywhere within the users home directory?

Thanks!
0
Comment
Question by:dh-s
  • 2
3 Comments
 
LVL 28

Accepted Solution

by:
pepr earned 250 total points
ID: 20402706
You probably want to use suitable environment variable and join the user-dependent path with the next parts of the configuration full name. Try something like this:
import os
 

print os.getenv('HOME')

s = os.path.join(os.getenv('HOME'), 'subdir1', 'subdir2', 'config.txt')

print s

Open in new window

0
 
LVL 28

Expert Comment

by:pepr
ID: 20402723
You might also be interested in Python standard module ConfigParser -- see http://docs.python.org/lib/module-ConfigParser.html
0
 

Author Closing Comment

by:dh-s
ID: 31412554
Thanks. "os.getenv('HOME')" was all I needed/was missing from the code I had before!

Also, thanks for the suggestion of ConfigParser, I will have a look at that when larger configuration files are needed (currently, I am only storing a few lines of text)
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Sequence is something that used to store data in it in very simple words. Let us just create a list first. To create a list first of all we need to give a name to our list which I have taken as “COURSE” followed by equals sign and finally enclosed …
Article by: Swadhin
Introduction of Lists in Python: There are six built-in types of sequences. Lists and tuples are the most common one. In this article we will see how to use Lists in python and how we can utilize it while doing our own program. In general we can al…
Learn the basics of strings in Python: declaration, operations, indices, and slicing. Strings are declared with quotations; for example: s = "string": Strings are immutable.: Strings may be concatenated or multiplied using the addition and multiplic…
Learn the basics of if, else, and elif statements in Python 2.7. Use "if" statements to test a specified condition.: The structure of an if statement is as follows: (CODE) Use "else" statements to allow the execution of an alternative, if the …

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

24 Experts available now in Live!

Get 1:1 Help Now