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Id
7756920
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AcceptedAnswerId
0
AnswerCount
0
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0
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CreationDate
2011-10-13T15:55:26.180
FavoriteCount
0
LastActivityDate
2011-10-13T16:08:40.297
LastEditDate
2011-10-13T16:08:40.297
LastEditorUserId
236036
OwnerUserId
236036
ParentId
7756619
PostTypeId
2
Score
9
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0
LastEditorDisplayName
text
Body
The <code>__repr__</code> should return a string that describes the object. If possible, it should be a valid Python expression that evaluates to an equal object. This is true for built-in types like <code>int</code> or <code>str</code>: <pre><code>>>> x = 'foo' >>> eval(repr(x)) == x True </code></pre> If that's not possible, it should be a <code>'<...>'</code> string uniquely describing the object. The default <code>__repr__</code> is an example of this: <pre><code>>>> class Foo(object): pass >>> >>> repr(Foo()) '<__main__.Foo object at 0x02A74E50>' </code></pre> It uses the object's address in memory to uniquely identify it. Of course address doesn't tell us much about the object so it's useful to override <code>__repr__</code> and return a string describing the object's state. The object's state is defined by other objects it contains so it makes sense to include their <code>repr</code> in yours. This is exactly what <code>list</code> or <code>dict</code> do: <pre><code>>>> repr(['bar', Foo()]) "['bar', <__main__.Foo object at 0x02A74710>]" </code></pre> In your case, the state is in your <code>Column</code> properties so you want to use their <code>repr</code>. You can use the <code>%r</code> formatting for this, it inserts a <code>repr()</code> of the argument: <pre><code>def __repr__(self): return '<Stats: description=%r, mystat=%r>' % (self.description, self.mystat) </code></pre> An equivalent using the new formatting: <pre><code>def __repr__(self): return '<Stats: description={0.description!r}, mystat={0.mystat!r}>'.format(self) </code></pre>
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