ComputeSpans2 | Python Fiddle

class Stack: 
    def__init__(self): 
        self.items = [] 
   
    #Check to see if the array is empty    
    def is_empty(self):
    	if not self.items:
            return False
        else: 
            return True 
    #Push a value to the stack itself
	def push(self, items): 
		self.items.append(items)
        
    #Pop, remove a value off of the stack
    def pop(self): 
        return self.items.pop()
    
    #Returning the index of the item in the array 
    def peek(self): 
        return self.items[len(self.items)-1]
    
    #Size, checking the value of the 
    def size(self): 
        return lens(self.items)

def computeSpans2(P):
    S=[]
    D= Stack()
     
    for i in range(len(P)):
        h = 0
        done = False
        while not (D.is_empty() or done):
            if P[i] >= P[D.peek()]:
                D.pop()
            else:
                done = True
        if D.is_empty():
            h = -1
        else:
            h = D.peek()
 
        S.append(i-h)
        D.push(i)
    return S, end
 
prices=[4,3,1,2,1,3,7]
print(computeSpans2(prices))

Browser Version Not Supported

Due to Python Fiddle's reliance on advanced JavaScript techniques, older browsers might have problems running it correctly. Please download the latest version of your favourite browser.
Chrome 10+ Firefox 4+ Safari 5+
IE 10+

Let me try anyway!

Python Fiddle

Python Cloud IDE