human
Solve the following python programming problem given the following code:
def __init__(self, deq, itergen) : 
    self.counter = len (itergen) 
    def giveup() : 
        self.counter = 0 
        raise RuntimeError ('deque mutated during iteration') 
self._gen = itergen (deq.state, giveup) 

    
    

    Fix the buggy line: self.counter = len (itergen)
assistant
#Here is Python program to fix the buggy line: self.

self.counter = len (deq)