Iterate a Nested Dictionary in Python

Question

My dictionary is structured as such:

stockData = {
    \'AAPL\': {
        \'beta\': 1.01833975315094,
        \'company_name\': \'Apple\',
        \'dividend\':         


        

Answer 1

Your problem can be solved in two parts:

1. Take the sum of total stocks. For that you may use sum() as:

   stock_sum = sum(stock_data['total'] for stock_data in stockData.values())
   

2. Iterate over the value to update the entry. Since you do not need key, use dict.values() to iterate over just the values:

   for stock_data in stockData.values():
       stock_data['percentage'] = stock_data['total']/stock_sum
       #   ^ Adds new key into your existing `dict` object
   

Now the values of your stockData dict holds additional key as percentage