code: def read_uint1(f):
      r"""
      >>> import io
      >>> read_uint1(io.BytesIO(b'\xff'))
      255
      """
  
      data = f.read(1)
      if data:
          return data[0]
      raise ValueError("not enough data in stream to read uint1")
  
imports: import codecs
  import io
  import pickle
  import re
  import sys
  from struct import unpack
  from pickle import decode_long
label_desc: Use image node_id 1 for calling a global function with example usage: read_uint1(f) and returns: data