删除 'bee'

bee

@@ -1,46 +0,0 @@
-class Stack:  
-    def __init__(self):  
-        self.items = []  
-          
-    def isEmpty(self):  
-        return len(self.items)==0   
-      
-    def push(self, item):  
-        self.items.append(item)  
-      
-    def pop(self):  
-        return self.items.pop()   
-      
-    def peek(self):  
-        if not self.isEmpty():  
-            return self.items[len(self.items)-1]  
-          
-    def size(self):  
-        return len(self.items)
- 
-   
-def postfixEval(postfixExpr):  
-    operandStack = Stack()  
-    tokenList =postfixExpr.split()  
-   
-    for token in tokenList:  
-        if token in"0123456789":  
-           operandStack.push(int(token))  
-        else:  
-            operand2 =operandStack.pop()  
-            operand1 =operandStack.pop()  
-            result =doMath(token,operand1,operand2)  
-            operandStack.push(result)  
-    return operandStack.pop()  
-   
-def doMath(op, op1, op2):  
-    if op == "*":  
-        return op1 * op2  
-    elif op == "/":  
-        return op1 / op2  
-    elif op == "+":  
-        return op1 + op2  
-    else:  
-        return op1 - op2  
-   
-print(postfixEval('7 8 + 3 2 + /'))