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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _group_coords(rs):
 """Organize coordinate regions into groups for each transcript. Avoids collapsing very large introns or repetitive genes spread across the chromosome by limiting the intron size to 100kb for creating a single transcript """

    max_intron_size = 1e5
    coords = []
    for r in rs:
        coords.append(r.start)
        coords.append(r.end)
    coord_groups = []
    cur_group = []
    for coord in sorted(coords):
        if not cur_group or coord - cur_group[-1] < max_intron_size:
            cur_group.append(coord)
        else:
            coord_groups.append(cur_group)
            cur_group = [coord]
    if cur_group:
        coord_groups.append(cur_group)
    return coord_groups