problem 2

problem2

>>> import random
>>> def alternate(a,b):
...     c = a + b
...     d = []
...     wanted = 'a'
...     while len(c) > 0:
...         i = random.randint(0, len(c) - 1)
...         print 'Is ',c[i],' from a or b?'
...         if raw_input() == wanted:
...             d.append( c[i] )
...             c = c[:i] + c[i+1:]
...             wanted = 'b' if wanted == 'a' else 'a'
...     return d
... 
>>> alternate( [1,2,3], ['a','b','c'] )
Is  c  from a or b?
b
Is  1  from a or b?
a
Is  a  from a or b?
b
Is  b  from a or b?
b
Is  b  from a or b?
b
Is  b  from a or b?
b
Is  3  from a or b?
a
Is  b  from a or b?
b
Is  c  from a or b?
b
Is  2  from a or b?
a
Is  c  from a or b?
b
[1, 'a', 3, 'b', 2, 'c']