##### jmespath - 基本表达式 ```python # 键 Selector('{"a": "foo", "b": "bar", "c": "baz"}',type='json').jmespath('a') # [<Selector query='a' data='foo'>] Selector('{"a": {"b": {"c": {"d": "value"}}}}',type='json').jmespath('a.b.c.d') # [<Selector query='a.b.c.d' data='value'>] # 索引 Selector('["a", "b", "c", "d", "e", "f"]',type='json').jmespath('[1]') # [<Selector query='[1]' data='b'>] # 切片 Selector('["a", "b", "c", "d", "e", "f"]',type='json').jmespath('[0:5]') # [<Selector query='[0:5]' data='a'>, # <Selector query='[0:5]' data='b'>, # <Selector query='[0:5]' data='c'>, # <Selector query='[0:5]' data='d'>, # <Selector query='[0:5]' data='e'>] ```