import timeit
 
list = timeit.Timer("'A' in list('AEIOU')")
set = timeit.Timer("'A' in set('AEIOU')")
string = timeit.Timer("'A' in 'AEIOU'")
 
print 'List search :',list.timeit(999999)
print 'Set search',set.timeit(999999)
print 'String search',string.timeit(999999)