Quick fix ( I dont recommend this ) would be to set max_recursion_depth to something higher.
import sys
sys.setrecursionlimit(1500)
As @randyzwitch has mentioned the error is in your traversal method cek_pola, How about you change the traversal to iterative?
Its untested but you should be able to resolve your error by changing your function to this,
def cek_pola(cekdata,tree):
stack = [tree]
while stack:
current_node = stack.pop()
for nodes in tree.keys():
value = cekdata[nodes]
tree = current_node[nodes][value]
pola = 0
if type(current_node) is dict:
stack.append(tree)
else:
pola = tree
break
return pola
Hope it helps !