def get_reads_snvs(rw, status, var=None):
    """
    The name of the function defines the purpose of this function
    :param rw: row of the VCF with the variant (SNVs only)
    :param status: TUMOR or NORMAL columns with the read information
    :param var: ALT or REF depending on the info that one wants to retrieve
    :return: the same row pandas Series object but with added columns
    """
    '''
    rw: row and therefore variant of the dataframe
    '''
    if status == 'TUMOR':
        rw['DP_tumor'] = rw[status].split(':')[0]
    elif status == 'NORMAL':
        rw['DP_normal'] = rw[status].split(':')[0]
    else:
        print('Not a valid status, only TUMOR or NORMAL')

    if rw[var] == 'A':
        rw['reads'] = rw[status].split(':')[-4:-3][0].split(',')[0]
    elif rw[var] == 'C':
        rw['reads'] = rw[status].split(':')[-3:-2][0].split(',')[0]
    elif rw[var] == 'G':
        rw['reads'] = rw[status].split(':')[-2:-1][0].split(',')[0]
    elif rw[var] == 'T':
        rw['reads'] = rw[status].split(':')[-1:][0].split(',')[0]
    else:
        print('You should indicate whether is REF or ALT that you are referring at')
    return rw