(2) sorted(iterable) : sorted function for iterables
In case of dictionary, sorted(dictionary) by default sort in keys.
In other words, in order of dictionary.keys()
To sort by values of a dictionary, one have to use key=function argument in sorted.
For example:
dict={ a: 3, b: 1, c: 2}
sorted(dict) gives [a,b,c]
We may define a function or use lambda function to sort by value
sorted(dict, key= lambda x: dict[x]) gives [b,c,a]
In case of dictionary of dictionary, we may use dictionary.items() as iterables.
mydict={ a: { age:10 }, b: {age:3}, c:{age:5} }
def getV(x): # dictionary.items gives tuple of key and value
return x[1]['age']
sorted(mydict.items(), key=getV)
or
sorted(mydict.keys(), key= lambda x:mydict[x]['age'])
