def underscored2camel_case(v):
    """converts ott_id to ottId."""
    vlist = v.split('_')
    c = []
    for n, el in enumerate(vlist):
        if el:
            if n == 0:
                c.append(el)
            else:
                c.extend([el[0].upper(), el[1:]])
    return ''.join(c)