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smarnach/gist:784475

Created January 18, 2011 14:10
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Be careful with object identity of immutable objects in Python (CPython 2.6.6)
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gistfile1.py
In [1]: a = 256
In [2]: b = 256
In [3]: a is b
Out[3]: True
In [4]: a = 257
In [5]: b = 257
In [6]: a is b
Out[6]: False
In [7]: a = 257; b = 257
In [8]: a is b
Out[8]: True
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