Filter dict is a method for search element in depth

filter_dict.py

In [1]: def filter_dict(data: dict, extract):
   ...:     try:
   ...:         if isinstance(extract, list):
   ...:             for i in extract:
   ...:                 result = filter_dict(data, i)
   ...:                 if result:
   ...:                     return result
   ...:         keys = extract.split('.')
   ...:         shadow_data = data.copy()
   ...:         for key in keys:
   ...:             if str(key).isnumeric():
   ...:                 key = int(key)
   ...:             shadow_data = shadow_data[key]
   ...:         return shadow_data
   ...:     except IndexError:
   ...:         return None
   ...:

In [2]: data = {'data': {'customer': {'name': 'Luke', 'phones': [{'type': 'mobile', 'number': '11999997777'}, {'type': 'home', 'number': '11999998888'}]}}}

In [3]: filter_dict(data, 'data.customer.name')
Out[3]: 'Luke'

In [4]: filter_dict(data, 'data.customer.phones')
Out[4]:
[{'type': 'mobile', 'number': '11999997777'},
 {'type': 'home', 'number': '11999998888'}]

In [5]: filter_dict(data, 'data.customer.phones.0')
Out[5]: {'type': 'mobile', 'number': '11999997777'}

In [6]: filter_dict(data, 'data.customer.phones.1')
Out[6]: {'type': 'home', 'number': '11999998888'}

In [7]: