<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_indices():
 """ Return a list of 3 integers representing EU indices for yesterday, today and tomorrow. """

    doc = BeautifulSoup(urlopen(BASEURL))

    divs = doc.select('.indices_txt')
    if not divs:
        return None

    sibling = divs[1].nextSibling
    if not sibling:
        return None

    data = sibling.nextSibling
    if not data:
        return None

    # the indices are in an HTML comment
    data = BeautifulSoup(data)

    divs = data.select('.selected')
    return map(lambda d: int(d.text), divs)