code: def is_avro(path_or_buffer):
      
      if is_str(path_or_buffer):
          fp = open(path_or_buffer, 'rb')
          close = True
      else:
          fp = path_or_buffer
          close = False
  
      try:
          header = fp.read(len(MAGIC))
          return header == MAGIC
      finally:
          if close:
              fp.close()
docs: Return True if path (or buffer) points to an Avro file.
  
      Parameters
      ----------
      path_or_buffer: path to file or file-like object
          Path to file