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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 view_pmap(token, dstore):
 """ Display the mean ProbabilityMap associated to a given source group name """

    grp = token.split(':')[1]  # called as pmap:grp
    pmap = {}
    rlzs_assoc = dstore['csm_info'].get_rlzs_assoc()
    pgetter = getters.PmapGetter(dstore, rlzs_assoc)
    pmap = pgetter.get_mean(grp)
    return str(pmap)