code: def read_char(fid, count=1):
      """Read character from bti file."""
      return _unpack_simple(fid, ">S%s" % count, "S")
  
imports: import numpy
  from ..._fiff.utils import read_str
label_desc: Use image node_id 3 for calling a global function with example usage: read_char(fid, count) and returns: _unpack_simple