utils.py 文件源码

def deprecated(func):
  '''This is a decorator which can be used to mark functions
  as deprecated. It will result in a warning being emitted
  when the function is used.'''

  @functools.wraps(func)
  def new_func(*args, **kwargs):
    warnings.warn_explicit(
      "Call to deprecated function {}.".format(func.__name__),
      category=DeprecationWarning,
      filename=func.func_code.co_filename,
      lineno=func.func_code.co_firstlineno + 1
    )
    return func(*args, **kwargs)

  return new_func