#List [], mutalbe
# Difference between List append() and List extend() method
# append() adds an single object to the list
# extend() unpacks the passed object and adds all elements in that object individually to the list
# append() method
a = [1,2]
b = [3,4]
a.append(b) #append() adds one element to the list
print("Using append() method", a) #[1, 2, [3, 4]]
# extend() method
x =[1,2]
y= [3,4]
x.extend(y) #extend() adds multiple elements
print("Using extend() method", x) #[1, 2, 3, 4]
sample_list = []
sample_list.extend('abc') #extend() unpacks the string and pass each char individually
print(sample_list) #['a', 'b', 'c']
# plus assignment, augmented assignment, concatenate merge the 2 lists, works like extend()
c =[1,2]
d = [3,4]
print(c + d) #[1, 2, 3, 4] #concatenate works like extend()
c += d
print("Using augmented assignment method", c) #[1, 2, 3, 4]