wish for open method

[CBusse]

May I suggest some more advanced interface into a SevenZipFile with an open method like it is provided in the zipfile module? Supporting read and write mode at minimum.

I am desperately looking into a way to use py7zr to generate bigger data sets that should not be kept in a simple data block/array, but need to be streamed into the archive (not from file system, either from another archive, or for example from a database).

For this I'd like to have some kind of a file handle into the archive where I could do writes of flexible sizes (just like a normal file handle) and data types.

While there is the writestr method, this method just does not give me the flexibility I would like to have (it is just not sensible to keep a structure that could go into multiple gigabyte sizes in memory all the time to supply as parameter here).

Do you see an easy path to implement this?

[miurahr]

Proposal and test implementation is welcome. Because I do not use memory interface by myself, I do not have a preference for it.
Also because of a nature of 7zip format, it is not possible to implement a file-system like interface that zipfile module provide.
7zip is a solid compression format. when you need last several bytes from a gigabytes of archive, you need to extract all the previous compressed data and then you get a byte.