Create dictionary from results of DataFrame in pandas

Question

I have a dataframe with results as below. Sample dataframe shown actual one is much larger. I want to get a dictionary (or another structure if it will be faster) with the

Answer 1

You can use .apply

df.apply(lambda x: list(x.dropna().index), axis=1).to_dict()       #Updated answer
# Or dict(df.apply(lambda x: list(x.index[~x.isnull()]), axis=1))  #Original answer

Output:

{1: ['MSFT'], 2: ['GOOG', 'AMZN'], 3: ['AAPL', 'AMZN', 'FB'], 4: ['FB']}