In my program I am keeping of set of items, which I want to keep between different runs

So I thought of storing the set in a file and loading the set from the file upon starting the program(sounds ok?)

My main question is: what is the right way to update the file?

1. write an extra item to the file everything I change the set?

2. keep new added items in a list/set and write them into the file every few seconds maybe?

3. something else?

i'm guessing between 1 and 2, 1 is better? i think while method 2 might be faster, i might lose data if the server goes down, am i right?

thanks!!

CodePudding user response：

(I'm sorry for my bad english). There is no reason to wait a while. It would be the most logical solution to keep the action you have done in an item/variable and update the file after checking it. Updating the file directly will tire your device even more.

CodePudding user response：

I'd suggest using pickle, which serializes and unserializes python data types.

Do you anticipate the program unexpectedly exiting? If not, you could write it at start and at close.