Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
?
Solved

Edit/read configuration text file within Python

Posted on 2007-12-04
3
Medium Priority
?
2,804 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 29

Accepted Solution

by:
pepr earned 1000 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 29

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

[Webinar On Demand] Database Backup and Recovery

Does your company store data on premises, off site, in the cloud, or a combination of these? If you answered “yes”, you need a data backup recovery plan that fits each and every platform. Watch now as as Percona teaches us how to build agile data backup recovery plan.

Question has a verified solution.

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

Have you ever been frustrated by having to click seven times in order to retrieve a small bit of information from the web, always the same seven clicks, scrolling down and down until you reach your target? When you know the benefits of the command l…
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 …
Learn the basics of lists in Python. Lists, as their name suggests, are a means for ordering and storing values. : Lists are declared using brackets; for example: t = [1, 2, 3]: Lists may contain a mix of data types; for example: t = ['string', 1, T…
Learn the basics of modules and packages in Python. Every Python file is a module, ending in the suffix: .py: Modules are a collection of functions and variables.: Packages are a collection of modules.: Module functions and variables are accessed us…
Suggested Courses

564 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