lists.md

Python Lists

Access list item by index

names = ['Han', 'Leia', 'Chewbacca']

print(names[0])
print(names[1])
print(names[2])

List iteration

names = ['Han', 'Leia', 'Chewbacca']

# Here 'n' is name and we get its index.
for n in names :
    i = names.index(n)
    print(i, n)

# Here 'i' is index and we get its name.
for i in range(len(names)) :
    print(i, names[i])    

Append item to list

names.append('R2-D2')
print(names)

Delete item from list

names.pop(1)
print(names)

Slice a list

names = ['Han', 'Leia', 'Chewbacca', 'Han', 'Leia', 'Chewbacca']

# Name 1 to 4
slice_01 = names[0:3]

# Name 5 to end
slice_02 = [4:len(names)-1]

Remove duplicate items from list

dupes = ['Han', 'Leia', 'Chewbacca', 'Han', 'Leia', 'Chewbacca']
unique = []

for name in dupes : 
    if name not in unique :
        unique.append(name)

print(unique)