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    <p>Possible duplicate: <a href="https://stackoverflow.com/questions/625083/python-init-and-self-what-do-they-do">Python __init__ and self what do they do?</a></p> <p><code>def print_word(word)</code> is a function (or method/procedure). <code>__init__(self)</code> is a function used within a <strong>class</strong>.</p> <p>This <a href="http://docs.python.org/tutorial/classes.html#class-objects" rel="nofollow noreferrer">section</a> of the Python tutorial on classes describes the <code>__init__</code> function. I'd highly recommend reading that entire page, btw.</p> <p><code>self</code> is an arbitrary choice of a word to refer to the class itself; if you wanted, you could use <code>watermelon</code>. See: <a href="https://stackoverflow.com/questions/2709821/python-self-explained">What is the purpose of self?</a></p> <p>Python class functions wrapped with the double underscore have a special meaning. Another example is <code>__str__</code>. This <a href="http://www.python.org/dev/peps/pep-0008/#descriptive-naming-styles" rel="nofollow noreferrer">section</a> of PEP8 (an important Python style document) explains the meaning of underscores in Python.</p> <hr> <p>Superclasses:</p> <ul> <li>The inheritance <a href="http://docs.python.org/tutorial/classes.html#inheritance" rel="nofollow noreferrer">section</a> of the Python class tutorial</li> <li><a href="https://stackoverflow.com/questions/3694371/how-do-i-initialize-the-base-super-class-in-python">How do I initialize the base (super) class?</a></li> </ul>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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