Add column names in each cell of a pandas data frame

I have a dataframe like below

I need to add the column name as key value pair inside each cell
eg: {"colname": "Ship Mode label"}

How to do that in pandas?

>Solution :

A simple loop should work to update the dictionaries in place:

for col in df:
    for s in df[col]:
        s['colname'] = col

example input:

df = pd.DataFrame({'A': [{'a': 1, 'b': 2}], 'B': [{'a': 1, 'b': 2}]})

output:

                                  A                                 B
0  {'a': 1, 'b': 2, 'colname': 'A'}  {'a': 1, 'b': 2, 'colname': 'B'}