Boolean values: Difference between revisions
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(→{{header|Python}}: ++String examples) |
(→{{header|Python}}: None is False.) |
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A user-created class that defines a <tt>.__nonzero__()</tt> method to return False, or whose <tt>.__len__()</tt> method returns 0 will be treated as <code>False</code>, otherwise the class/instance is treated as <code>True</code>. |
A user-created class that defines a <tt>.__nonzero__()</tt> method to return False, or whose <tt>.__len__()</tt> method returns 0 will be treated as <code>False</code>, otherwise the class/instance is treated as <code>True</code>. |
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None is also <code>False</code> in a boolean context. |
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'''Some examples:''' |
'''Some examples:''' |
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