The Quick and Painless Tutorial 

http://www.python.org/current/tut/

 numbers: 1, 2, 3.0, (3+9j), complex(7,9)

 strings: "a", 'a', """aaa"""
 a = "a", b = "b", c = a + b + a*3
 d = c[3] # d == 'a'
 e = c[0:1] # e == 'a', the slice of c from 0 to 1 
 # strings are immutable (cannot be changed)
 e[0] = 'g' # error
 len(e) # 1

 lists: [1,3], ['a', 7, 9L, 7j] # L is 'long', j is for complex
 # lists are mutable
 lst = [1,2]
 lst[1] = 3 # lst == [1,3]
 #lists can be nested
 lst = [1, ['a', 'b'], []]