drop non-json object rows from python dataframe column

Question

I have a dataframe such that the column contains both json objects and strings. I want to get rid of rows that does not contains json objects.

Below is how my dataframe

Answer 1

df[df.applymap(np.isreal).sum(1).gt(0)]
Out[794]: 
                            A
2    {'a': 5, 'b': 6, 'c': 8}
5  {'d': 9, 'e': 10, 'f': 11}