删除了Jupyter中函数的一个单元格

如果你仍然像你说的那样在内存中,你可能仍然能够得到函数的源代码。

这篇文章提供了一种通过inspect库获取信息的方法: https://stackoverflow.com/a/427533/14486144

import inspect
lines = inspect.getsource(foo)
print(lines)

Try give that a shot, I tried it out in jupyter notebooks, although I wasn't exactly sure how to recreate your situation that you can't undo deleted cells. Try that out and see it if works.