code: def read_nb(fname):
      "Read a notebook in `fname` and return its corresponding json"
      with open(fname,'r') as f: return nbformat.reads(f.read(), as_version=4f read_nb(fname):
      "Read a notebook in `fname` and return its corresponding json"
      with open(fname,'r') as f: return nbformat.reads(f.read(), as_version=4)
docs: Read a notebook in `fname` and return its corresponding json