class backtrace_element(object):

def __init__(self,backtraces):

self._backtraces = backtraces

def __eq__(self,other):

address1 = self._backtraces

address2 = other._backtraces

if len(address1) != len(address2) :

return False

it1 = address1.__iter__()

it2 = address2.__iter__()

try:

while True:

if it1.next() != it2.next():

return False

except StopIteration as e:

pass

return True

def __hash__(self):

if not hasattr(self, '_cachedHash'):

num = 0

for x in self._backtraces:

num = num ^ x

self._cachedHash = num

return self._cachedHash