code: def dictVals(l,key):
      
      dicts=dictFlat(l)
      vals=np.empty(len(dicts))*np.nan
      for i in range(len(dicts)):
          if key in dicts[i]:
              vals[i]=dicts[i][key]
      return vals
docs: Return all 'key' from a list of dicts. (or list of list of dicts)