Something

testorz = [
10.0/3.0,
5.0/3.0,
1.0/3.0
]

for val in testorz:

    s = str(val).split('.')[1]
    print '\nval = ',val 
    print 's = ', s
    for i in xrange(len(s)/2):
        if(len(s.replace(s[0:i],''))==0):
            print 'repeating', s[0:i]
            break;
    else:
        print 'notrepeating'