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POPython: modules and packaging - why isn't __init__.py file executed before __main__.py?
 

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  1. POPython: modules and packaging - why isn't __init__.py file executed before __main__.py?
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    <p>I have a python program that is entirely contained in a directory with the following structure:</p> <pre><code>myprog/ ├── __init__.py ├── __main__.py ├── moduleone.py └── moduletwo.py </code></pre> <p>I would like to be able to package this and distribute it so that another developer can do <code>pip install -e /path/to/git/clone/of/myprog</code> and can then import myprog in his own programs and do cool stuff with it.</p> <p>I would also like to be able to run myprog at the command line as follows:</p> <pre><code>PROMPT&gt; python myprog </code></pre> <p>When I do this, I expect python to execute the <code>__main__.py</code> module, which it does. However, this module makes references to some functions that are declared in <code>__init__.py</code> and which need to be available both when the program is run at the command line and when it is imported by another program. However, I'm getting the following error:</p> <pre><code>NameError: name 'function_you_referenced_from_init_file' is not defined </code></pre> <p>Do I have to import these functions into <code>__main__.py</code> somehow?</p> <p>I tried a simple example as follows:</p> <pre><code>PROMPT&gt; cat myprog/__init__.py def init_myprog(): print 'running __init__.init_myprog()' PROMPT&gt; cat myprog/__main__.py import myprog print 'hi from __main__.py' myprog.init_myprog() PROMPT&gt; ls -l myprog total 16 -rw-r--r-- 1 iit 63B Aug 30 11:40 __init__.py -rw-r--r-- 1 iit 64B Aug 30 12:11 __main__.py PROMPT&gt; python myprog Traceback (most recent call last): File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 162, in _run_module_as_main "__main__", fname, loader, pkg_name) File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 72, in _run_code exec code in run_globals File "/Users/jon/dev/myprog/__main__.py", line 1, in &lt;module&gt; import myprog ImportError: No module named myprog </code></pre>
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    1. COTo whoever is voting to close the question -- if it's that stupid and simple, maybe you could just explain it to me in a couple of seconds? I tried to learn from this link http://stackoverflow.com/questions/3411293/using-modules-own-objects-in-main-py but am still having trouble.
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      1. USjononomo
    2. COYou have to import everything except builtins, so the answer is a pretty obvious "yes".
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      1. POPython: modules and packaging - why isn't __init__.py file executed before __main__.py?
      1. USLennart Regebro
 

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