<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _calc_overlap_count( markers1: dict, markers2: dict, ):
 """Calculate overlap count between the values of two dictionaries Note: dict values must be sets """

    overlaps=np.zeros((len(markers1), len(markers2)))

    j=0
    for marker_group in markers1:
        tmp = [len(markers2[i].intersection(markers1[marker_group])) for i in markers2.keys()]
        overlaps[j,:] = tmp
        j += 1

    return overlaps