194 lines
4.3 KiB
TeX
194 lines
4.3 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 '\_\_' 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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\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}
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