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70 lines
2.0 KiB
70 lines
2.0 KiB
2 years ago
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import re
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2 years ago
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from math import cos, sin, exp, sqrt
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2 years ago
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class Expression:
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def __init__(self, val=None, gauche=None, droite=None):
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if Token.isNumber(val) and (gauche != None or droite != None):
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raise AttributeError("gauche et droite ne peuvent pas exister si val est un nombre")
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self.val = val
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self.gauche = gauche
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self.droite = droite
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def evalue(self):
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if self.val == "+":
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return self.gauche.evalue() + self.droite.evalue()
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elif self.val == "-":
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return self.gauche.evalue() - self.droite.evalue()
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elif self.val == "*":
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return self.gauche.evalue() * self.droite.evalue()
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elif self.val == "/":
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return self.gauche.evalue() / self.droite.evalue()
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2 years ago
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elif self.val == "^":
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return self.gauche.evalue() ** self.droite.evalue()
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elif self.val == "cos":
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return cos(self.gauche.evalue())
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elif self.val == "sin":
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return sin(self.gauche.evalue())
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elif self.val == "exp":
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return exp(self.gauche.evalue())
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elif self.val == "sqrt":
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return sqrt(self.gauche.evalue())
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2 years ago
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else:
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return float(self.val)
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def __str__(self):
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if Token.isNumber(self.val):
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return str(self.val)
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2 years ago
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return "(" + str(self.gauche.__str__()) + str(self.val) + str(self.droite.__str__()) + ")"
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class Token:
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NUMBER = 0
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OPERATOR = 1
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PARENTHESE = 2
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FUNCTION = 3
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@staticmethod
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def isChar(n):
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return re.match(r'[a-z]', str(n)) is not None
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@staticmethod
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def isNumber(n):
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return re.match(r'\d+', str(n)) is not None
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@staticmethod
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def getPrecedence(tok):
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if tok == "(" or tok == "" or tok == "^":
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return 4
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elif tok == "*" or tok == "/":
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return 3
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elif tok == "+" or tok == "-":
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return 2
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def __init__(self, type, val):
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self.type = type
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self.val = val
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def __str__(self):
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return self.val
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