Sorting MD-Arrays

mdarraysort.py

n = int(input())
a = []
for i in range(n):
    item, distance = input().split()
    distance = float(distance)
    a.append([item, distance])
sortdata = sorted(a, key=lambda x: x[1], reverse=True)
string = ""
for i in sortdata:
    string+=str(i[0]) + " "
print(string[:-1])

import operator
n = int(input())
distances = {}

for i in range(n):
    item, distance = input().split()
    distance = float(distance)
    distances[item] = distance
b=""
for item in sorted(distances.items(),key=operator.itemgetter(1))[::-1]:
    b+=item[0]+" "
print(b[:-1])