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# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License.
from typing import List
from .dialog_instance import DialogInstance
class DialogState:
"""
Contains state information for the dialog stack.
"""
def __init__(self, stack: List[DialogInstance] = None):
"""
Initializes a new instance of the :class:`DialogState` class.
:param stack: The state information to initialize the stack with.
:type stack: :class:`typing.List`
"""
if stack is None:
self._dialog_stack = []
else:
self._dialog_stack = stack
@property
def dialog_stack(self):
"""
Initializes a new instance of the :class:`DialogState` class.
:return: The state information to initialize the stack with.
:rtype: :class:`typing.List`
"""
return self._dialog_stack
def __str__(self):
if not self._dialog_stack:
return "dialog stack empty!"
return " ".join(map(str, self._dialog_stack))
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