Check If Parent Dict Is Not Empty And Retrieve The Value Of The Nested Dict

Let's suppose that I have a nested dictionary which looks like that: parent_dict = { 'parent_key': {'child_key': 'child_value'} How can I write the following code: if parent_dict.

Solution 1:

you could use the dict.get method:

if parent_dict.get('parent_key', {}).get('child_key') == 'value_1':
    ...

dict.get(key) will return dict[key] if the key exists; otherwise it will return None.dict.get(key, default) will return default if the key does not exist. setting the default value to an empty dict {} will make the second .get work.

Solution 2:

Use key in dict:

if 'parent_key' in parent_dict and parent_dict['parent_key']['child_key'] == 'value_1':
    print('Value detected')