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| = Introduction to distutils = I have recently used distutils for the first time and thought I would share what I have learned. |
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| '''Please note:''' ''I am not a pro. All this is based on my own hacking and struggling to get things to work. I am sure there will be alternative ways to do things and that I will make mistakes. Caveat Emptor.'' | |
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| (Based on Gnu/Linux) == The layout of folders == A proper layout of your files and folders can really save you trouble later on. I use this layout: {{{ top |-- package | |-- __init__.py | |-- module.py | `-- things | |-- cross.png | |-- fplogo.png | `-- tick.png |-- runner |-- MANIFEST.in |-- README `-- setup.py }}} * top - The very top of the tree is some arbitrary folder, perhaps in your home directory under pythondev. It doesn't matter. * package - I call it this to indicate that it's where I am developing my package(s). ''(Packages are simply folders with modules (py files) in them. They also have a special file called `__init__.py` so that Python will know that this folder is a package.)'' * package/things - This is where I will keep all my things. Here I have some image files, but you can put anything your module may need here. Naturally you can use any folder name you like. * The other files are all in the root and will be described soon. == The files == I assume that there will be a single script file that you will use to start your Python app. I call it 'runner' (without the .py) in this example. It will import the actual package. Here is the code: ''runner'' {{{ #!/usr/bin/env python2.4 ##This will work in development on a relative folder basis ##It will then work when installed in site-packages on a target system ##where the runner script is in /usr/bin (or wherever) ## ##So, you don't need anything special - no fancy path tricks. import package.module package.module.start () }}} Next is the package. In this case there is only one module in the package (import package.module), so here is the module: ''module.py'' {{{#!/usr/bin/env python2.4 import os, sys def determine_path (): """Borrowed from wxglade.py""" try: root = __file__ if os.path.islink(root): root = os.path.realpath(root) return os.path.dirname(os.path.abspath(root)) except: print "I'm sorry, but something is wrong." print "There is no __file__ variable. Please contact the author." sys.exit () def start (): print "module is running" print determine_path () print "My various data files and so on are:" files = [f for f in os.listdir(determine_path () + "/things")] print files if __name__ == "__main__": print "Decide what to do" }}} This uses the magic variable `__file__` that will return the path and name of the module. Without it you would have to jump through some hoops to locate the module on any given distro or O/S. ''(If you can find this in the Python docs, then your grep-foo is better than mine. I found it by pouring through other Python apps in the site-packages folder of python2.4)'' |
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