query nested python map structured

py

stuff = {
  "A":{
     "B":{
        "C":"D"   
     }
  }
}

def query(d,p):
    if len(p)==1:
        return d[p[0]]
    else:
        return query(d[p[0]],p[1:])



query(stuff,["A","B","C"])
# "D"
query(stuff,["A","B"])
# {"C":"D"}