Task - Access nested keys

Accessing a value in a nested dictionary can lead to difficult to read syntax like: data['really']['deeply']['nested']['value'].

Implement a method get that takes a dictionary and a nested key name with levels seperated by . (really.deeply.nested.value in the example) and returns the value if it exists and None if it doesn't.

A key can also be an integer like in.a.list.0.

Input:

data = {
  'students': [
    {
      'name': 'Josephine',
      'subjects': [
        {
          'name': 'English',
          'teacher': 'Mr. Hoover'
        }
      ]
    },
    {
      'name': 'Luke',
      'subjects': [
        {
          'name': 'History',
          'teacher': 'Mrs. Peters'
        }
      ]
    },
    {
      'name': 'Julia',
      'subjects': [
        {
          'name': 'Chemistry',
          'teacher': 'Mrs. Fauci'
        }
      ]
    }
  ]
}

Output:

> get(data, 'students.1.subjects.0.name')
History

> get(data, 'students.0.subjects.0.teacher')
Mr. Hoover