Plugin-based component modeling tool.
Project description
- package name:
TheLandlab
- Version:
- 0.1
- release date:
2013-03-24
- url:
- license:
MIT
Install
Installing a release
We don’t have any releases of The Landlab yet so this doesn’t work right now. However, once we have a stable release, this is how users will install our software on their machine:
$ pip install TheLandlab
This will install Landlab as well as any prerequisite packages (required packages are listed in setup.py).
Installing from a source distribution
To install the landlab package from a source distribution (like what you get with a Subversion checkout), run the setup.py script with the install argument:
$ python setup.py install
This will put the landlab package into a system-wide location so that you can import landlab from any python session. It will also install any required packages.
Note that if you are developing landlab you will probably not want to do this! If you do, you would have to run this command everytime you make a change to the code. Instead, you want to install the package in “development mode”. See below in the “Development Environment” section for details on how to do this.
Developing The Landlab
This section describes one possible workflow when developing The Landlab.
Using Subversion
The standard resource for Subversion “Version Control with Subversion” book. It’s available online and is completely free!
Checkout a copy of the source
Use Subversion to checkout the latest version of the source code:
$ svn co https://csdms.colorado.edu/svn/TheLandlab/trunk landlab
Alternatively, if you already have a working copy of the repository you may want to update it with changes that others have committed to the repository:
$ svn update
Review your changes
Now that you’ve made changes to some files, you’ll probably want to have a look at what you’ve done. To see what it is you’ve changed since your last commit (or since you last checkout), use the status command:
$ svn status
Use the Subversion diff command to see the differences between your copy and the copy that you checked out:
$ svn diff <changed_file>
where <changed_file> is the name of the file you’ve made changes to. If you don’t list any file names, this command will print the differences for all files that have changes.
Commit your changes to the repository
Once you have made changes to your copy of the source and are happy with the changes, you can commit them back to the repository:
$ svn commit
This will commit all changes that you have made under the current directory. If you only want to commit changes to a file or two, you can list the file names separately on the command line:
$ svn commit <one_file> <another_file>
The Development Environment
Once I have a working copy of The Landlab source code, I use the pip command to install a development version of the code. If I’m in the base landlab folder (the folder that contains setup.py), I run the following:
$ pip install -e .
This sets up python so that it knows where the landlab package is when try to import it - regardless of what directory you are in. This allows python commands like:
>>> import landlab >>> from landlab import craters
to work. If you didn’t do this you might start getting errors that contain something like:
ImportError: No module named landlab
To uninstall your development version of landlab:
$ pip uninstall TheLandlab
Running Unit Tests
Immediatly after update your working copy of the code (or checking out a new version) I will normally run the unit tests for the package to make sure nothing is broken. You can do this with setup.py:
$ python setup.py test
You should also probably do this before commiting changes to the repository to make sure you didn’t break things.
Coding Style
Because Python is so flexible style-wise, please try to stick to the coding style described by PEP8,
http://www.python.org/dev/peps/pep-0008/
An easy way to make sure that you’ve done this is by running the pep8 command on each file that you edit. If you don’t have pep8 installed, you will have to install it with:
$ pip install pep8
Now you can run it on a Python source file. For instance:
$ pep8 craters.py
At first, this will probably return lots of problems with you source file. Don’t worry though, it won’t take long to get used to the coding style and be able to write compatible code straigt away. If we stick to this it will make it much easier to read the code written by any one of us.
Build API Documentation
You can build documentation for the LandLab API using Sphinx. Once you have set up your envrionment to properly import landlab, you can generate the necessary sphinx files with:
$ python setup.py build_sphinx
This will put a bunch of files in the docs folder. The HTML documentation will be under the docs/_build/html/ folder. Pointing your browser to index.html under this folder will give you the top-level page for the documentation. This entire folder is relocatable, so if you would like your documentation elsewhere you can easily move the folder around.
If you have added, removed, or renamed files you may need to regenerate some of the sphinx files and rebuild the api docs. If you have Sphinx installed, you can do this with (from the directory that contains setup.py):
$ sphinx-apidoc -o docs landlab
Happy Landlab-ing!
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