code: def whathdr(filename):
      """Recognize sound headers."""
      with open(filename, "rb") as f:
          h = f.read(512)
          for tf in tests:
              res = tf(h, f)
              if res:
                  return SndHeaders(*res)
          return None
  
file_path: catboost/contrib/tools/python3/src/Lib/sndhdr.py
imports: import warnings
  from collections import namedtuple
label_desc: Use image node_id 2 for calling a global function with example usage: whathdr(filename) and returns: None, SndHeaders