I need to program a way of storing and deleting multiple objects so that they stay around even after the program has been closed and that when you re-start the program you can search for an object?
I'am using python 3.0 not 2.7.
i.e. I create A class with different Variables, I initialise it with an object and the next time I use my program I can search for the stored object and all its variables.
Jump to Postcheck out the pickle module (I think it still is used with v3.x)
Jump to PostYa, pickle will allow you to save your classes to disk. Once you close python, objects are removed from memory so it doesn't make much sense to talk about restoring unless you've saved it to your harddisk.
check out the pickle module (I think it still is used with v3.x)
Ya, pickle will allow you to save your classes to disk. Once you close python, objects are removed from memory so it doesn't make much sense to talk about restoring unless you've saved it to your harddisk.
Ya, pickle will allow you to save your classes to disk. Once you close python, objects are removed from memory so it doesn't make much sense to talk about restoring unless you've saved it to your harddisk.
just like they said before the built in pickle module should be able to do all that for you
pickle python documentation
I've Tried Pickling objects But how do I then Recover Multiple Objects becasue If I store more than one object from the same class it only returns the first object?
The class itself cannot be pickled, but the list of instances can. To use the pickled data file in another program, you have to recode the class in that program.
See:
http://www.daniweb.com/software-development/python/code/444923/pickle-class-instances-python#
A dictionary is also a good way to pickle multiple instances so that you can look them up by some sort of logical key.
If you want to use a dictionary, you might as well use Python module shelve and create a 'persistent to file' dictionary.
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