human
Solve the following python programming problem given the following code:
def DecayShares(self, timestamp) : 
    "Decays 'total_shares' and 'colocated_shares' based on 'timestamp'. Updates 'last_share'
    and 'last_colocated' to 'timestamp'.
    " 
    def _ComputeDecay(shares, last_time) : 
        if (last_time is None) : 
            assert (shares is None), shares 
            return 0 
decay = math.exp ((((- math.log (2)) * (timestamp - last_time)) / Friend._SHARE_HALF_LIFE)) 
        return (shares * decay) 
self.total_shares = _ComputeDecay (self.total_shares, self.last_share) 
    self.last_share = timestamp 
    self.colocated_shares = _ComputeDecay (self.colocated_shares, self.last_colocated) 
    self.last_colocated = _ComputeDecay 

    
    

    Fix the buggy line: self.last_colocated = _ComputeDecay
assistant
#Here is Python code to fix the buggy line: self.

self.last_colocated = timestamp