school

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stack.py (892B)

      1 class Stack:
      2     def __init__(self, size):
      3         self.maxSize = size
      4         self.pointer = -1 
      5         self.data = []
      6     
      7     def peek(self):
      8         print(self.data[self.pointer])
      9 
     10     def push(self, element):
     11         if self.pointer > self.maxSize:
     12             exit(1)
     13         else:
     14             self.data.append(element)
     15             self.pointer = self.pointer + 1
     16 
     17     def pop(self):
     18         self.data.pop()
     19         self.pointer = self.pointer - 1 
     20 
     21     def isfull(self):
     22         if len(self.data) == self.maxSize:
     23             return True
     24         else:
     25             return False
     26     
     27     def isempty(self):
     28         if len(self.data) == 0:
     29             return True
     30         else:
     31             return False
     32 
     33     
     34 mystack = Stack(10)
     35 
     36 myinternalstack = Stack(10)
     37 
     38 for i in range(10):
     39     myinternalstack.push("hello")
     40 
     41 
     42 for i in range(10):
     43     mystack.push(myinternalstack)
     44 
     45 mystack.peek()
     46 
     47