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# sorting.py

# Thanks so much Corey Schafer for the great explanation

# https://www.youtube.com/channel/UCCezIgC97PvUuR4_gbFUs5g

# Sorting Lists

li = [9, 1, 8, 2, 7, 3, 6, 4, 5]

# s_li = sorted(li) # [1, 2, 3, 4, 5, 6, 7, 8, 9]

# s_li = li.sort() # None

s_li = sorted(li, reverse=True) # [9, 8, 7, 6, 5, 4, 3, 2, 1]

print('Sorted Variable:\t', s_li)

li.sort()

print('Original Variable:\t', li)

li = [-6, -5, -4, 1, 2, 3]

s_li = sorted(li) # li = [-6, -5, -4, 1, 2, 3]

s_li = sorted(li, key = abs) # [1, 2, 3, -4, -5, -6]

# Sorting Tuples

tup = (9, 1, 8, 2, 7, 3, 6, 4, 5)

s_tup = sorted(tup) # [1, 2, 3, 4, 5, 6, 7, 8, 9]

print('Tuple\t', s_tup)

# Sorting Dicts

di = {'name': 'Dasha', 'job': 'programming', 'age': None, 'dog': 'Lebowski'}

s_di = sorted(di) # ['age', 'dog', 'job', 'name']

print('Soreted dict is just sorted keys\t', s_di)

# Sorting Objects

class Employee():

def __init__(self, name, age, salary):

self.name = name

self.age = age

self.salary = salary

def __repr__(self):

return '({},{},${})'.format(self.name, self.age, self.salary)

from operator import attrgetter

e1 = Employee('Carl', 37, 70000)

e2 = Employee('Sarah', 29, 80000)

e3 = Employee('John', 43, 90000)

employees = [e1, e2, e3]

def e_sort(emp):

return emp.name # I can use other keys for sorting too

s_employees = sorted(employees, key=e_sort)

print(s_employees) #[(Carl,37,$70000), (John,43,$90000), (Sarah,29,$80000)]

# Using lambda

s_employees = sorted(employees, key=lambda e: e.name) #the same result

# Or attrgetter

s_employees = sorted(employees, key=attrgetter('age'))