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Reference

ActivePython 2.4

Python Documentation

Library Reference

2. Built-In Objects

2.3 Built-in Types

2.3.1 Truth Value Testing

2.3.2 Boolean Operations -- and, or, not

2.3.3 Comparisons

2.3.4 Numeric Types -- int, float, long, complex

2.3.5 Iterator Types

2.3.6 Sequence Types -- str, unicode, list, tuple, buffer, xrange

2.3.7 Set Types -- set, frozenset

2.3.8 Mapping Types -- classdict

2.3.9 File Objects

2.3.10 Other Built-in Types

2.3.11 Special Attributes

MyASPN >> Reference >> ActivePython 2.4 >> Python Documentation >> Library Reference >> 2. Built-In Objects

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2.3 Built-in Types

The following sections describe the standard types that are built into the interpreter. Historically, Python's built-in types have differed from user-defined types because it was not possible to use the built-in types as the basis for object-oriented inheritance. With the 2.2 release this situation has started to change, although the intended unification of user-defined and built-in types is as yet far from complete.

The principal built-in types are numerics, sequences, mappings, files classes, instances and exceptions.

Some operations are supported by several object types; in particular, practically all objects can be compared, tested for truth value, and converted to a string (with the ` ...` notation, the equivalent repr() function, or the slightly different str() function). The latter function is implicitly used when an object is written by the print statement. (Information on print statement and other language statements can be found in the Python Reference Manual and the Python Tutorial.)

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