154 lines
5.5 KiB
Haxe
154 lines
5.5 KiB
Haxe
|
/*
|
|||
|
* Copyright (C)2005-2019 Haxe Foundation
|
|||
|
*
|
|||
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|||
|
* copy of this software and associated documentation files (the "Software"),
|
|||
|
* to deal in the Software without restriction, including without limitation
|
|||
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|||
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|||
|
* Software is furnished to do so, subject to the following conditions:
|
|||
|
*
|
|||
|
* The above copyright notice and this permission notice shall be included in
|
|||
|
* all copies or substantial portions of the Software.
|
|||
|
*
|
|||
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|||
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|||
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|||
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|||
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|||
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|||
|
* DEALINGS IN THE SOFTWARE.
|
|||
|
*/
|
|||
|
|
|||
|
package python.lib;
|
|||
|
|
|||
|
@:pythonImport("random")
|
|||
|
extern class Random {
|
|||
|
/**
|
|||
|
Initialize the random number generator.
|
|||
|
|
|||
|
If `a` is omitted or `null`, the current system time is used.
|
|||
|
If randomness sources are provided by the operating system,
|
|||
|
they are used instead of the system time (see the os.urandom()
|
|||
|
function for details on availability).
|
|||
|
|
|||
|
If `a` is an int, it is used directly.
|
|||
|
|
|||
|
With `version` 2 (the default), a str, bytes, or bytearray object
|
|||
|
gets converted to an int and all of its bits are used.
|
|||
|
With version 1, the hash() of a is used instead.
|
|||
|
**/
|
|||
|
static function seed(?a:Int, ?version:Int):Float;
|
|||
|
|
|||
|
/**
|
|||
|
Return an object capturing the current internal state of the generator.
|
|||
|
This object can be passed to setstate() to restore the state.
|
|||
|
**/
|
|||
|
static function getstate():RandomState;
|
|||
|
|
|||
|
/**
|
|||
|
`state` should have been obtained from a previous call to `getstate`(),
|
|||
|
and `setstate`() restores the internal state of the generator to what
|
|||
|
it was at the time `getstate`() was called.
|
|||
|
**/
|
|||
|
static function setstate(state:RandomState):Void;
|
|||
|
|
|||
|
/**
|
|||
|
Returns a Python integer with `k` random bits.
|
|||
|
This method is supplied with the `MersenneTwister` generator and
|
|||
|
some other generators may also provide it as an optional part of the API.
|
|||
|
When available, `getrandbits`() enables `randrange`() to handle arbitrarily large ranges.
|
|||
|
**/
|
|||
|
static function getrandbits(k:Int):Int;
|
|||
|
|
|||
|
/**
|
|||
|
Return a randomly selected element from `range(start, stop, step)`.
|
|||
|
This is equivalent to `choice(range(start, stop, step))`,
|
|||
|
but doesn’t actually build a range object.
|
|||
|
**/
|
|||
|
@:overload(function(stop:Int):Int {})
|
|||
|
static function randrange(start:Int, stop:Int, ?step:Int):Int;
|
|||
|
|
|||
|
/**
|
|||
|
Return a random integer N such that `a <= N <= b`. Alias for `randrange(a, b+1)`.
|
|||
|
**/
|
|||
|
static function randint(a:Int, b:Int):Int;
|
|||
|
|
|||
|
/**
|
|||
|
Return the next random floating point number in the range [0.0, 1.0).
|
|||
|
**/
|
|||
|
static function random():Float;
|
|||
|
|
|||
|
/**
|
|||
|
Return a random floating point number N such that
|
|||
|
`a <= N <= b` for `a <= b` and `b <= N <= a` for `b < a`.
|
|||
|
**/
|
|||
|
static function uniform(a:Float, b:Float):Float;
|
|||
|
|
|||
|
/**
|
|||
|
Return a random floating point number N such that
|
|||
|
`low <= N <= high` and with the specified `mode` between those bounds.
|
|||
|
The `low` and `high` bounds default to zero and one.
|
|||
|
The `mode` argument defaults to the midpoint between the bounds,
|
|||
|
giving a symmetric distribution.
|
|||
|
**/
|
|||
|
static function triangular(?low:Float, ?high:Float, ?mode:Float):Float;
|
|||
|
|
|||
|
/**
|
|||
|
Beta distribution. Conditions on the parameters are `alpha > 0` and `beta > 0`.
|
|||
|
Returned values range between 0 and 1.
|
|||
|
**/
|
|||
|
static function betavariate(alpha:Float, beta:Float):Float;
|
|||
|
|
|||
|
/**
|
|||
|
Exponential distribution. `lambd` is 1.0 divided by the desired mean.
|
|||
|
It should be nonzero. Returned values range from 0 to positive infinity if `lambd` is positive,
|
|||
|
and from negative infinity to 0 if `lambd` is negative.
|
|||
|
**/
|
|||
|
static function expovariate(lambd:Float):Float;
|
|||
|
|
|||
|
/**
|
|||
|
Gamma distribution. (Not the gamma function!)
|
|||
|
Conditions on the parameters are `alpha > 0` and `beta > 0`.
|
|||
|
**/
|
|||
|
static function gammavariate(alpha:Float, beta:Float):Float;
|
|||
|
|
|||
|
/**
|
|||
|
Gaussian distribution. `mu` is the mean, and `sigma` is the standard deviation.
|
|||
|
This is slightly faster than the `normalvariate` function defined below.
|
|||
|
**/
|
|||
|
static function gauss(mu:Float, sigma:Float):Float;
|
|||
|
|
|||
|
/**
|
|||
|
Log normal distribution. If you take the natural logarithm of this distribution,
|
|||
|
you’ll get a normal distribution with mean `mu` and standard deviation `sigma`.
|
|||
|
`mu` can have any value, and `sigma` must be greater than zero.
|
|||
|
**/
|
|||
|
static function lognormvariate(mu:Float, sigma:Float):Float;
|
|||
|
|
|||
|
/**
|
|||
|
Normal distribution. `mu` is the mean, and `sigma` is the standard deviation.
|
|||
|
**/
|
|||
|
static function normalvariate(mu:Float, sigma:Float):Float;
|
|||
|
|
|||
|
/**
|
|||
|
`mu` is the mean angle, expressed in radians between 0 and 2*pi,
|
|||
|
and `kappa` is the concentration parameter, which must be greater than or equal to zero.
|
|||
|
If `kappa` is equal to zero, this distribution reduces to a uniform random angle
|
|||
|
over the range 0 to 2*pi.
|
|||
|
**/
|
|||
|
static function vonmisesvariate(mu:Float, kappa:Float):Float;
|
|||
|
|
|||
|
/**
|
|||
|
Pareto distribution. alpha is the `shape` parameter.
|
|||
|
**/
|
|||
|
static function paretovariate(alpha:Float):Float;
|
|||
|
|
|||
|
/**
|
|||
|
Weibull distribution. `alpha` is the scale parameter and `beta` is the shape parameter.
|
|||
|
**/
|
|||
|
static function weibullvariate(alpha:Float, beta:Float):Float;
|
|||
|
}
|
|||
|
|
|||
|
abstract RandomState({}) {}
|