May 2017
Intermediate to advanced
310 pages
8h 5m
English
Content preview from Python Data Structures and Algorithms
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Operations and expressions
There are a number of operations that are common to all data types. For example, all data types, and generally all objects, can be tested for a truth value in some way. The following are values that Python considers False:
- The None type
- False
- An integer, float, or complex zero
- An empty sequence or mapping
- An instance of a user-defined class that defines a __len__() or __bool__() method that returns zero or False
All other values are considered True.