list1 = ["apple", "banana", "cherry"]
list2 = list1
# Right now these are identical
print (list1)
print (list2)
list1.append('orange')
# Notice that the new item is also added to list2
# ['apple', 'banana', 'cherry', 'orange']
print (list1)
print (list2)
# I think this means list2 is a pointer referencing list1.
# So changes made to list1 are seen in list2,
# and vice-versa.
list2.pop()
# ['apple', 'banana', 'cherry']
print (list1)
print (list2)
# So we need a way to actually *copy* the list
list2 = list1.copy()
list1.append('orange')
list2.pop()
# Now we're cooking with gas
# ['apple', 'banana', 'cherry', 'orange']
# ['apple', 'banana']
print (list1)
print (list2)
print("---")
# Another way to copy a list
list1 = ["apple", "banana", "cherry"]
list3 = list(list1)
# ['apple', 'banana', 'cherry']
print (list3)
list3.insert(2, "popsicle")
#['apple', 'banana', 'cherry']
#['apple', 'banana', 'popsicle', 'cherry']
print (list1)
print (list3)
