def pi_random_init(depth):
tree = Tree(str(params['BNF_GRAMMAR'].start_rule[0]),
None, max_depth=depth, depth_limit=depth)
genome = tree.pi_random_derivation(0, max_depth=depth)
if tree.check_expansion(params['BNF_GRAMMAR'].non_terminals.keys()):
print("tree.pi_random_init generated an Invalid")
quit()
return tree.get_output(), genome, tree, False
def pi_grow_init(depth):
tree = Tree((str(params['BNF_GRAMMAR'].start_rule[0]), ),
None,
max_depth=depth,
depth_limit=depth)
genome = tree.pi_grow(0, max_depth=depth)
if tree.check_expansion():
print("tree.pi_grow_init generated an Invalid")
quit()
return tree.get_output(), genome, tree, False
def tree_init(depth, method):
"""
Initialise a tree to a given depth using a specified method for
initialisation.
"""
tree = Tree((str(params['BNF_GRAMMAR'].start_rule[0]), ),
None,
max_depth=depth - 1,
depth_limit=depth - 1)
genome, nodes, d, max_depth = mapper.tree_derivation(
tree, [], method, 0, 0, 0, depth - 1)
if tree.check_expansion():
print("tree.init generated an Invalid")
quit()
return tree.get_output(), genome, tree, nodes, \
False, max_depth, len(genome)