如何腌制一个空文件？

Question

I want to pickle a file that sometime's is empty. Right now its empty, but my idea is that its going to grow over time.

How do i check if a file is "pickable" since it seems that you can not pickle a empty file?

Answer 1

Simply use a try/except block.

def example():
  try:
    return pickle.loads("")
  except EOFError:
    return None

It's easier to ask forgiveness than permission. :)

Answer 2

Pickle is considered unsafe. Try Cerealizer instead. It might incidentally solve your empty file problem.