class_docstr: A dictionary that applies an arbitrary key-altering function
  before accessing the keys.
class_docstr_tok: ["A","dictionary","that","applies","an","arbitrary","key-altering","function","before","accessing","the","keys","."]
code: def __getitem__(self, keys_str=""):
      if keys_str == "":
          return super(NestedBlobsDict, self).__getitem__(self)
  
      keylist = keys_str.split(".")
  
      cur = super(NestedBlobsDict, self).__getitem__(keylist[0])
      if len(keylist) == 1:
          return cur
      else:
          return NestedBlobsDict(cur)[".".join(keylist[1:])]
  
imports: from typing import Optional, Any
label_desc: Use image node_id 2 for calling the NestedBlobsDict obj's underlying member method code with example usage: obj.__getitem__(keys_str) and returns: super, cur, NestedBlobsDict