Good job! When grouping elements, we can also use the get() function to shorten the code. Check this out:
names = ['John', 'Mary', 'Alice', 'Kate', 'Michael', 'Samantha', 'Adrian', 'Gray']
groups = {}
for name in names:
key = len(name)
groups[key] = groups.get(key, []) + [name]
print(groups)
The code above works in the same way as the previous code, but it is much shorter. Instead of checking if a given key exists, we use groups.get(key, []). This code will either return the existing list for the given key or an empty list. Then all we need to do is add a one-element list with the given name ([name]).
Rewrite the template code so that it uses the get() function.
Use the following line of code:
runways[runway] = runways.get(runway, []) + [airport_name]
