lists.py

#Lists
bicycles = ['trek', 'cannondale', 'redline', 'specialized']
print(bicycles)
#['trek', 'cannondale', 'redline', 'specialized']

#List Access
#First
print(bicycles[0])
#trek
#Last
print(bicycles[-1])
#specialized

#Modification
bicycles[0] = 'training'
print(bicycles[0])
#training

#Adding
bicycles.append('mountain')
print(bicycles[-1])
#mountain

#Inserts value at 0 and shifts all elements to the right
bicycles.insert(0, 'toddler')
print(bicycles[0])
#toddler

#Removal of list items
del bicycles[0]
print(bicycles)
# ['training', 'cannondale', 'redline', 'specialized', 'mountain']

#Popping from tail
bicycles.pop()
print(bicycles)
# ['training', 'cannondale', 'redline', 'specialized']

#Popping from inside list; all elements to right shift to left
bicycles.pop(1)
print(bicycles)
# ['training', 'redline', 'specialized']

#Remove by value
bicycles.remove('training')
print(bicycles)
#['redline', 'specialized']

#Sort the list
bicycles.sort(reverse = True)
print(bicycles)
#['specialized', 'redline']

#Returns a sorted list without sorting the list itself
print(sorted(bicycles))
print(bicycles)
#['redline', 'specialized']
#['specialized', 'redline']

#Reverse index order
bicycles.reverse()
print(bicycles)
#['redline', 'specialized']

#List length
print(len(bicycles))
#2

#Multiple assignment of list values to variables
cat = ['fat', 'gray', 'loud']
size, color, disposition = cat
print(size)
print(color)
print(disposition)

#Enumerating a list
for index, item in enumerate(cat):
	print(index)
	print(item)

#Get a random value
import random
print(random.choice(cat))

#Randomly sort the list
random.shuffle(cat)
print(cat)

#Convert back and forth to immutable tuple
t = tuple(cat)
print(t)
l = list(t)
print(l)

#Copy vs Deep Copy - Deep copy does inner lists. These methods create a new reference, so they can be changed
#independently of each other
c = [['fat', 'loud'], 1, 2]
import copy
c2 = copy.copy(c)
c2.append(3)
print(c)
print(c2)