194 lines
4.2 KiB
TeX
194 lines
4.2 KiB
TeX
% Contributed by Skip Montanaro, from the module's doc strings.
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\section{Built-in Module \sectcode{operator}} % If implemented in C
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\bimodindex{spam}
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The \code{operator} module exports a set of functions implemented in C
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corresponding to the intrinsic operators of Python. For example,
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{}\code{operator.add(x, y)} is equivalent to the expression x+y. The
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function names are those used for special class methods; variants without
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leading and trailing \samp{__} are also provided for convenience.
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The \code{operator} module defines the following functions:
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\renewcommand{\indexsubitem}{(in module operator)}
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\begin{funcdesc}{add}{a, b}
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Return a + b, for a and b numbers.
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\end{funcdesc}
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\begin{funcdesc}{__add__}{a, b}
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Return a + b, for a and b numbers.
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\end{funcdesc}
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\begin{funcdesc}{sub}{a, b}
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Return a - b.
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\end{funcdesc}
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\begin{funcdesc}{__sub__}{a, b}
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Return a - b.
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\end{funcdesc}
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\begin{funcdesc}{mul}{a, b}
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Return a * b, for a and b numbers.
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\end{funcdesc}
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\begin{funcdesc}{__mul__}{a, b}
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Return a * b, for a and b numbers.
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\end{funcdesc}
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\begin{funcdesc}{div}{a, b}
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Return a / b.
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\end{funcdesc}
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\begin{funcdesc}{__div__}{a, b}
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Return a / b.
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\end{funcdesc}
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\begin{funcdesc}{mod}{a, b}
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Return a \% b.
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\end{funcdesc}
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\begin{funcdesc}{__mod__}{a, b}
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Return a \% b.
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\end{funcdesc}
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\begin{funcdesc}{neg}{o}
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Return o negated.
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\end{funcdesc}
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\begin{funcdesc}{__neg__}{o}
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Return o negated.
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\end{funcdesc}
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\begin{funcdesc}{pos}{o}
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Return o positive.
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\end{funcdesc}
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\begin{funcdesc}{__pos__}{o}
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Return o positive.
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\end{funcdesc}
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\begin{funcdesc}{abs}{o}
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Return the absolute value of o.
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\end{funcdesc}
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\begin{funcdesc}{__abs__}{o}
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Return the absolute value of o.
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\end{funcdesc}
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\begin{funcdesc}{inv}{o}
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Return the inverse of o.
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\end{funcdesc}
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\begin{funcdesc}{__inv__}{o}
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Return the inverse of o.
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\end{funcdesc}
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\begin{funcdesc}{lshift}{a, b}
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Return a shifted left by b.
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\end{funcdesc}
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\begin{funcdesc}{__lshift__}{a, b}
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Return a shifted left by b.
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\end{funcdesc}
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\begin{funcdesc}{rshift}{a, b}
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Return a shifted right by b.
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\end{funcdesc}
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\begin{funcdesc}{__rshift__}{a, b}
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Return a shifted right by b.
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\end{funcdesc}
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\begin{funcdesc}{and_}{a, b}
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Return the bitwise and of a and b.
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\end{funcdesc}
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\begin{funcdesc}{__and__}{a, b}
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Return the bitwise and of a and b.
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\end{funcdesc}
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\begin{funcdesc}{or_}{a, b}
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Return the bitwise or of a and b.
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\end{funcdesc}
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\begin{funcdesc}{__or__}{a, b}
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Return the bitwise or of a and b.
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\end{funcdesc}
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\begin{funcdesc}{concat}{a, b}
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Return a + b for a and b sequences.
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\end{funcdesc}
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\begin{funcdesc}{__concat__}{a, b}
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Return a + b for a and b sequences.
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\end{funcdesc}
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\begin{funcdesc}{repeat}{a, b}
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Return a * b where a is a sequence and b is an integer.
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\end{funcdesc}
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\begin{funcdesc}{__repeat__}{a, b}
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Return a * b where a is a sequence and b is an integer.
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\end{funcdesc}
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\begin{funcdesc}{getitem}{a, b}
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Return the value of a at index b.
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\end{funcdesc}
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\begin{funcdesc}{__getitem__}{a, b}
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Return the value of a at index b.
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\end{funcdesc}
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\begin{funcdesc}{setitem}{a, b, c}
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Set the value of a at index b to c.
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\end{funcdesc}
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\begin{funcdesc}{__setitem__}{a, b, c}
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Set the value of a at index b to c.
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\end{funcdesc}
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\begin{funcdesc}{delitem}{a, b}
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Set the value of a at index b.
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\end{funcdesc}
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\begin{funcdesc}{__delitem__}{a, b}
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Set the value of a at index b.
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\end{funcdesc}
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\begin{funcdesc}{getslice}{a, b, c}
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Return the slice of a from index b to index c-1.
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\end{funcdesc}
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\begin{funcdesc}{__getslice__}{a, b, c}
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Return the slice of a from index b to index c-1.
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\end{funcdesc}
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\begin{funcdesc}{setslice}{a, b, c, v}
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Set the slice of a from index b to index c-1 to the sequence v.
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\end{funcdesc}
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\begin{funcdesc}{__setslice__}{a, b, c, v}
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Set the slice of a from index b to index c-1 to the sequence v.
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\end{funcdesc}
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\begin{funcdesc}{delslice}{a, b, c}
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Delete the slice of a from index b to index c-1.
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\end{funcdesc}
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\begin{funcdesc}{__delslice__}{a, b, c}
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Delete the slice of a from index b to index c-1.
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\end{funcdesc}
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Example: Build a dictionary that maps the ordinals from 0 to 256 to their
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character equivalents.
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\bcode\begin{verbatim}
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>>> import operator
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>>> d = {}
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>>> keys = range(256)
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>>> vals = map(chr, keys)
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>>> map(operator.setitem, [d]*len(keys), keys, vals)
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\end{verbatim}\ecode
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