How to use 'traversing a dictionary in python' in Python

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181def visit_dict_expr(self, o: DictExpr) -> None:
182 for k, v in o.items:
183 if k is not None:
184 k.accept(self)
185 v.accept(self)

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75def walk_tree(node):
76 yield node
77 d = node.__dict__
78 for key, value in d.items():
79 if isinstance(value, list):
80 for val in value:
81 for _ in walk_tree(val):
82 yield _
83 elif 'ast' in str(type(value)):
84 for _ in walk_tree(value):
85 yield _
86 else:
87 yield value

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