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Feat(Core/API): Random generation methods for numbers

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This commit is contained in:
Bertrand Benjamin 2018-12-22 08:42:31 +01:00
parent fd49a6c987
commit f04e221f70
2 changed files with 141 additions and 26 deletions
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48
mapytex/calculus/API/tokens/number.py
View File

@ -14,6 +14,7 @@ from decimal import Decimal as _Decimal
from random import random, randint
from .token import Token
from ...core.arithmetic import gcd
from ...core.random import filter_random
from ...core.MO import MO, MOnumber
from ...core.MO.fraction import MOFraction
@ -58,7 +59,7 @@ class Integer(Token):
min_value = -10,
max_value = 10,
rejected = [0, 1],
reject_callbacks=[],
accept_callbacks=[],
):
""" Generate a random Integer
@ -66,14 +67,11 @@ class Integer(Token):
:param min_value: minimum value
:param max_value: maximum value
:param rejected: rejected values
:param reject_callbacks: list of function for value rejection
:param accept_callbacks: list of function for value acceptation
"""
conditions = [lambda x: x in rejected] + reject_callbacks
candidate = randint(min_value, max_value)
while any(c(candidate) for c in conditions):
candidate = randint(min_value, max_value)
candidate = filter_random(min_value, max_value,
rejected, accept_callbacks)
return Integer(candidate, name)
@ -181,10 +179,10 @@ class Fraction(Token):
name="",
fix_num="",
min_num=-10, max_num=10, rejected_num=[0],
reject_num_callbacks=[],
accept_num_callbacks=[],
fix_denom="",
min_denom=-10, max_denom=10, rejected_denom=[0, 1, -1],
reject_denom_callbacks=[],
accept_denom_callbacks=[],
irreductible=False,
not_integer=True
):
@ -195,39 +193,37 @@ class Fraction(Token):
:param min_num: minimum value for the numerator
:param max_num: maximum value for the numerator
:param rejected_num: rejected values for the numerator
:param reject_num_callbacks: list of function for numerator rejection
:param accept_num_callbacks: list of function for numerator rejection
:param fix_denom: if set, the denomerator will get this value
:param min_denom: minimum value for the denominator
:param max_denom: maximum value for the denominator
:param rejected_denom: rejected values for the denominator
:param reject_denom_callbacks: list of function for denomerator rejection
:param accept_denom_callbacks: list of function for denomerator rejection
:param irreductible: is the generated fraction necessary irreductible
:param not_integer: can the generated fraction be egal to an interger
"""
if fix_num == "":
conditions = [lambda x: x in rejected_denom] + reject_num_callbacks
num = randint(min_num, max_num)
while any(c(num) for c in conditions):
num = randint(min_num, max_num)
num = filter_random(min_num, max_num,
rejected_num,
accept_num_callbacks)
else:
num = fix_num
if fix_denom == "":
conditions = [lambda x: x in rejected_denom] + reject_denom_callbacks
accept_callbacks = accept_denom_callbacks
if irreductible:
def not_prime_with_num(denom):
return gcd(num, denom) != 1
conditions.append(not_prime_with_num)
def prime_with_num(denom):
return gcd(num, denom) == 1
accept_callbacks.append(prime_with_num)
if not_integer:
def divise_num(denom):
return num % denom == 0
conditions.append(divise_num)
def not_divise_num(denom):
return num % denom != 0
accept_callbacks.append(not_divise_num)
denom = randint(min_denom, max_denom)
while any(c(denom) for c in conditions) :
denom = randint(min_denom, max_denom)
denom = filter_random(min_denom, max_denom,
rejected_denom,
accept_callbacks)
else:
denom = fix_denom

119
mapytex/calculus/core/random.py Normal file
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@ -0,0 +1,119 @@
#! /usr/bin/env python
# -*- coding: utf-8 -*-
# vim:fenc=utf-8
#
# Copyright © 2017 lafrite <lafrite@Poivre>
#
# Distributed under terms of the MIT license.
"""
Function to create random things
"""
from random import randint, choice
__all__ = ["reject_random", "filter_random", "FilterRandom"]
def reject_random(min_value = -10,
max_value = 10,
rejected = [0, 1],
accept_callbacks=[],
):
""" Generate a random integer with the rejection method
:param name: name of the Integer
:param min_value: minimum value
:param max_value: maximum value
:param rejected: rejected values
:param accept_callbacks: list of function for value rejection
"""
conditions = [lambda x: x not in rejected] + accept_callbacks
candidate = randint(min_value, max_value)
while not all(c(candidate) for c in conditions):
candidate = randint(min_value, max_value)
return candidate
def filter_random(min_value = -10,
max_value = 10,
rejected = [0, 1],
accept_callbacks=[],
):
""" Generate a random integer by filtering then choosing a candidate
:param name: name of the Integer
:param min_value: minimum value
:param max_value: maximum value
:param rejected: rejected values
:param accept_callbacks: list of function for value rejection
"""
candidates = set(range(min_value, max_value+1))
candidates = {c for c in candidates if c not in rejected}
candidates = [candidate for candidate in candidates \
if all(c(candidate) for c in accept_callbacks)]
if len(candidates) == 0:
raise OverflowError("There is no candidates for this range and those conditions")
return choice(candidates)
class FilterRandom(object):
""" Integer random generator which filter then choose candidate
"""
# TODO: Faire un cache pour éviter de reconstruire les listes à chaque fois |ven. déc. 21 19:07:42 CET 2018
def __init__(self,
rejected = [0, 1],
accept_callbacks=[],
min_value = -10,
max_value = 10,
):
self.conditions = (lambda x: x not in rejected,) + tuple(accept_callbacks)
self._min = min_value
self._max = max_value
candidates = set(range(self._min, self._max+1))
self._candidates = { candidate for candidate in candidates \
if all(c(candidate) for c in self.conditions) }
def add_candidates(self, low, high):
""" Add candidates between low and high to _candidates """
if low < self._min:
self._min = low
useless_low = False
else:
useless_low = True
if high > self._max:
self._max = high
useless_high = False
else:
useless_high = True
if not(useless_low and useless_high):
candidates = set(range(low, high+1))
self._candidates = self._candidates.union({
candidate for candidate in candidates \
if all(c(candidate) for c in self.conditions) \
})
def candidates(self, min_value=-10, max_value=10):
""" Return candidates between min_value and max_value """
return [c for c in self._candidates if (c > min_value and c < max_value)]
def __call__(self, min_value=-10, max_value=10):
""" Randomly choose on candidate """
self.add_candidates(min_value, max_value)
return choice(self.candidates(min_value, max_value))
# -----------------------------
# Reglages pour 'vim'
# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
# cursor: 16 del