Python

Modifying iterables with Itertools

# Group owners by the car they own

import itertools

car_owners = [("Rishi", "XUV"), ("Lizzy", "Scorpio"), ("Boris", "Swift"), ("Theresa", "Civic"), ("Winston", "Civic"), ("Taylor", "Swift"), ("Cameron", "XUV")]

# sort car_owners by car name

# group owners by car using groupby
# grouping = 

for car, owners in grouping:
  print(f"{car} is owned by", ', '.join(map(lambda x: x[0], owners)))


import itertools

car_owners = [("Rishi", "XUV"), ("Lizzy", "Scorpio"), ("Boris", "Swift"), ("Theresa", "Civic"), ("Winston", "Civic"), ("Taylor", "Swift"), ("Cameron", "XUV")]

car_owners.sort(key=lambda x: x[1])
grouping = itertools.groupby(car_owners, lambda x: x[1])

for car, owners in grouping:
  print(f"{car} is owned by", ', '.join(map(lambda x: x[0], owners)))
