functional.py 文件源码

def extract_lazy_object(lo):
    """
    Unwrap a LazyObject and return the inner object. Whatever that may be.

    ProTip: This is relying on `django.utils.functional.empty`, which may
    or may not be removed in the future. It's 100% undocumented.
    """
    if not hasattr(lo, '_wrapped'):
        return lo
    if lo._wrapped is empty:
        lo._setup()
    return lo._wrapped