Random_expression accept calc in conditions
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@ -6,6 +6,8 @@ from .expression import Expression
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from .renders import tex_render, txt_render
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import re
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from .arithmetic import gcd
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class RdExpression(object):
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"""A generator of random expression builder"""
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@ -30,11 +32,17 @@ class RdExpression(object):
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"""
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pattern = "\{(.*?)\}" #select inside {} non greedy way
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varia = re.findall(pattern, self._form)
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varia = set(varia)
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self._2replaced = varia
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return varia
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varia_form = re.findall(pattern, self._form)
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varia_form = set(varia_form)
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varia_cond = set()
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for c in self._conditions:
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varia_cond = varia_cond | set(re.findall(pattern, c))
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self._2replaced = varia_cond | varia_form
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return self._2replaced
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def get_letters(self):
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"""Find letters in the form
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@ -96,7 +104,9 @@ class RdExpression(object):
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return Expression(exp)
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def gene_varia(self, val_min = -10, val_max = 10):
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"""RAndomly generates variables/letters
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"""Randomly generates variables/letters
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Varia can't be equal to 0
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"""
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for l in self._letters:
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@ -104,6 +114,7 @@ class RdExpression(object):
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while self._gene_varia[l] == 0:
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self._gene_varia[l] = randint(val_min, val_max)
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for e in self._2replaced:
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self._gene_2replaced[e] = eval(e, globals(), self._gene_varia)
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@ -113,7 +124,7 @@ class RdExpression(object):
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"""
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if self._conditions != []:
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return eval(" and ".join(self._conditions).format(**self._gene_varia))
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return eval(" and ".join(self._conditions).format(**self._gene_2replaced))
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else:
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return True
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@ -130,16 +141,22 @@ def desc_rdExp(rdExp):
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if __name__ == '__main__':
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#form = "{a}*-14 / (2*{b}) : -23 / 4"
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#cond = ["{a} + {b} in [1, 2, 3, 4, 5]", "{a} not in [0,1]", "{b} not in [0,1]"]
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#rdExp1 = RdExpression(form, cond)
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#desc_rdExp(rdExp1)
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#rdExp2 = RdExpression(form)
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#desc_rdExp(rdExp2)
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#form = "{a+a/10}*4 + {a} + 2*{b}"
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#cond = ["{a} + {b} in [1, 2, 3, 4, 5]", "{a} not in [0,1]", "{b} not in [0,1]"]
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#rdExp3 = RdExpression(form)
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#desc_rdExp(rdExp3)
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form = "{a}*-14 / (2*{b}) : -23 / 4"
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cond = ["{a} + {b} in [1, 2, 3, 4, 5]", "{a} not in [1]", "{b} not in [1]"]
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rdExp1 = RdExpression(form, cond)
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desc_rdExp(rdExp1)
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rdExp2 = RdExpression(form)
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desc_rdExp(rdExp2)
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form = "{a+a*10}*4 + {a} + 2*{b}"
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cond = ["{a} + {b} in [1, 2, 3, 4, 5]", "abs({a}) not in [1]", "{b} not in [1]", "gcd({a},{b}) == 1"]
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rdExp3 = RdExpression(form, cond)
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desc_rdExp(rdExp3)
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form = "{a+a*10}*4 + {a} + 2*{b}"
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cond = ["{a-b} + {b} in list(range(20))", "abs({a}) not in [1]", "{b} not in [1]", "gcd({a},{b}) == 1"]
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rdExp3 = RdExpression(form, cond)
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desc_rdExp(rdExp3)
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