I have 2 nested dictionaries:

```
 grouped1 ={'LabelStat': { 'Carrier': ['1', '1'],
                           'FormID': ['0201', '0430']},

             'McAfee': {'DatDate': 'Not Available',
            '            DatVersion': 'Not Available'}
           }

 grouped2 ={'LabelStat': {'Carrier': ['2', '2'],
                          'FormID': ['10201', '10430']},
         'McAfee': {'DatDate': 'Available',
            'DatVersion': 'Available',}
           }

```

And I want to append these 2 dictionaries,the output should looks like this:

```
com_grouped = {
    'LabelStat': {'Carrier': ['1', '1','2','2'],
                   'FormID': ['0201', '0430','10201', '10430']}

    'McAfee': {'DatDate': ['Not Available','Available']
               'DatVersion': ['Not Available','Available']}

             }

```

First tried:

```
com_grouped = grouped1.update(grouped2)
print(com_grouped)

```

And out put is none.

Then I tired:

```
com_grouped = grouped1
com_grouped=com_grouped.update(grouped2)
print(com_grouped)

```

Out put is still none!