Google string problem

circular.py

def areCircular(s1,s2):
    result = False
    size = len(s1)
    nbPermut = size
    tmp = s1
    while( not result and nbPermut > 0):
        circularPermutation = []
        for i in range(size):
            circularPermutation.append(tmp[(i - 1)%size])
        tmp = ''.join(circularPermutation)
        if(s2 == tmp):
            result = True
        nbPermut-=1
    return result