class_docstr: Abstract base class for a file lock object.
docstr: If the file lock could be acquired, self._lock_file_fd holds the file descriptor of the lock file.
docstr_tok: ["If","the","file","lock","could","be","acquired",",","self._lock_file_fd","holds","the","file","descriptor","of","the","lock","file","."]
code: def _acquire(self):
      """If the file lock could be acquired, self._lock_file_fd holds the file descriptor of the lock file."""
      raise NotImplementedError
  
imports: import logging
  import time
  from threading import Lock
  from ._error import Timeout
label_desc: Use image node_id 5 for calling the BaseFileLock obj's underlying member method code with example usage: obj._acquire() without return types