code: def read_uint8(fid):
      """Read unsigned 8bit integer from bti file."""
      return _unpack_simple(fid, ">u1", np.uint8)
  
imports: import numpy
  from ..._fiff.utils import read_str
label_desc: Use image node_id 5 for calling a global function with example usage: read_uint8(fid) and returns: _unpack_simple