# We will use a list of dictionary objects representing students, their classes and their current grade
students = [
    {'name':'Paul Allen', 'class':'Science','grade':'A'},
    {'name':'paul allen', 'class':'Math','grade':'C'},
    {'name':'Bob Lewis', 'class':'Science','grade':'D'},
    {'name':'Bob Lewis', 'class':'math','grade':'b'}, 
    {'name':'bob Lewis', 'class':'History','grade':'f'}, 
]

# Sort by class and grade descending, case sensitive
ex1 = multikeysort(students, ['class', '-grade'])


# Sort by class and grade descending, case insensitive
from operator import itemgetter, methodcaller
# Create a unary function that will get the column value and then call the .lower() method
get_class = compose(itemgetter('class'), methodcaller('lower'))
get_grade = compose(itemgetter('grade'), methodcaller('lower'))

ex1 = multikeysort(students, ['class', '-grade'],{'class':get_class,'grade':get_grade})