In .... mode an expression, all by itself, has no visible effect

operations allowed with strings in python

'Spam'*3

The elements of a list don't have to be the same type

Lists are ....

strings are ...

a = [1, 2, 3]
b = [4, 5, 6]
c = a + b c =

a = [1, 2, 3]
c = a * 3 c =

t = ['a', 'b', 'c', 'd', 'e', 'f']
t[1:3]

s = 'spam' t = list(s) t =

s = 'pining for the fjords' t = s.split() t =

a = [1, 2, 3] b = a b is a

t4 = [1, 2, 3]
t = t4[1:]
t4 =

lists are ... and tuples are ...

t = tuple('lupins')

t = ('a', 'b', 'c', 'd', 'e') t[0] = 'A'

you can replace one tuple with another

t = ('a', 'b', 'c', 'd', 'e')
t = ('A',) + t[1:]
t

(0, 1, 2) < (0, 3, 4)

(0, 1, 2000000) < (0, 3, 4)

it copies the object and any references it contains