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"""Tutorial 2 - how to use decisions
The behavior tree looks like:
--> sequence:
succes_threshold: 2
--(children)--> decision:
--(condition)--> is_name_set:
--(success_tree)--> say_hello:
--(failure_tree)--> sequence:
--(children)--> ask_for_name:
--(children)--> say_hello:
--(children)--> some_action:
"""
import curio
import async_btree as bt
import contextvars
async def some_action():
print("continue here...")
return bt.SUCCESS
async def say_hello():
print(f"Hello {name.get()}")
async def is_name_set():
return name.get() != ""
async def ask_for_name():
new_name = input("Hello, whats your name? \n")
if new_name != "":
name.set(new_name)
else:
return bt.FAILURE
name = contextvars.ContextVar('name', default="")
greet_with_name = bt.decision(
condition=is_name_set, success_tree=say_hello, failure_tree=bt.sequence([ask_for_name, say_hello])
)
b_tree = bt.sequence(children=[greet_with_name, some_action])
if __name__ == '__main__':
curio.run(b_tree)
# You can take a look at the final behavior tree
abstract_tree_tree_1 = bt.analyze(b_tree)
print(bt.stringify_analyze(abstract_tree_tree_1))
geronimo-iia /
async-btree
