ahhh

expression.py

@@ -0,0 +1,37 @@
+import re
+
+class Token:
+    OPERAND_ADDITION = "+"
+    OPERAND_MULTIPLICATION = "*"
+    NUMBER = re.compile(r"^\\d+$") #CHANGER
+
+class Expression:
+
+    def __init__(self, val, gauche=None, droite=None):
+        if Token.NUMBER.match(str(val)) and (gauche != None or droite != None):
+            raise AttributeError("gauche et droite ne peuvent pas exister si val est un nombre")
+        self.val = val
+        self.gauche = gauche
+        self.droite = droite
+
+    def evalue(self, this):
+        #if Token.NUMBER.match(str(this.val)):
+        print(this.val)
+        #    return int(this.val)
+        if this.val == Token.OPERAND_ADDITION:
+            return this.evalue(this.gauche) + this.evalue(this.droite)
+        elif this.val == Token.OPERAND_MULTIPLICATION:
+            return this.evalue(this.gauche) * this.evalue(this.droite)
+        else:
+            return int(this.val)
+
+    def __str__():
+        pass
+
+exp = Expression('*',
+Expression(6, None, None),
+Expression('+',
+Expression(4, None, None),
+Expression(3, None, None)
+))
+print(exp.evalue(exp))