def find_idx(ind, c1, c2):
    """
    finds exact match (1 diff) in c2 and returns the index.
    """
    ctx2 = c2.view_contexts('sentence', as_strings=True)
    ctx = c1.view_contexts('sentence', as_strings=True)[ind]
    
    for i in xrange(len(ctx2)):
        if 2 < eqva(ctx, ctx2[i]):
            return str(i)
    return ''
dataset/ETHPy150Open inpho/vsm/vsm/extensions/editions.py/find_idx/swapped operands of `<`