mirror of https://github.com/python/cpython
43 lines
1.3 KiB
TeX
43 lines
1.3 KiB
TeX
\section{Standard Module \sectcode{whrandom}}
|
|
\stmodindex{whrandom}
|
|
|
|
This module implements a Wichmann-Hill pseudo-random number generator
|
|
class that is also named \code{whrandom}. Instances of the
|
|
\code{whrandom} class have the following methods:
|
|
\renewcommand{\indexsubitem}{(in module whrandom)}
|
|
|
|
\begin{funcdesc}{choice}{seq}
|
|
Chooses a random element from the non-empty sequence \var{seq} and returns it.
|
|
\end{funcdesc}
|
|
|
|
\begin{funcdesc}{randint}{a\, b}
|
|
Returns a random integer \var{N} such that \code{\var{a}<=\var{N}<=\var{b}}.
|
|
\end{funcdesc}
|
|
|
|
\begin{funcdesc}{random}{}
|
|
Returns the next random floating point number in the range [0.0 ... 1.0).
|
|
\end{funcdesc}
|
|
|
|
\begin{funcdesc}{seed}{x\, y\, z}
|
|
Initializes the random number generator from the integers
|
|
\var{x},
|
|
\var{y}
|
|
and
|
|
\var{z}.
|
|
When the module is first imported, the random number is initialized
|
|
using values derived from the current time.
|
|
\end{funcdesc}
|
|
|
|
\begin{funcdesc}{uniform}{a\, b}
|
|
Returns a random real number \var{N} such that \code{\var{a}<=\var{N}<\var{b}}.
|
|
\end{funcdesc}
|
|
|
|
When imported, the \code{whrandom} module also creates an instance of
|
|
the \code{whrandom} class, and makes the methods of that instance
|
|
available at the module level. Therefore one can write either
|
|
\code{N = whrandom.random()} or:
|
|
\begin{verbatim}
|
|
generator = whrandom.whrandom()
|
|
N = generator.random()
|
|
\end{verbatim}
|