How do I determine which dictionary has the most entries? : <p>I have a dictionary in which the key is a country code, and the value is a dictionary. For each country, the key is one of seven airport types, and the value is a list of airport names. </p>

<p>I'm trying to determine what country has the most airports of a certain type. In other words, which country has the most entries in it's subdictionary for seaplane bases. </p>

<p>How can I accomplish this? </p>
