python file-like buffer object

Question

I've written a buffer class that provides a File-like interface with read , write , seek , tell , flush methods to a simple string in memory. Of course it is incomplete (eg I didn't write readline ). It's purpose is to be filled by a background thread from some external data source, but let a user treat it like a file. I'd expect it to contain a relatively small amount of data (maybe 50K max)

Is there a better way to do this instead of writing it from scratch?

Answer 1

You can use the standard Python modules StringIO or cStringIO to obtain an in-memory buffer which implements the file interface .

cStringIO is implemented in C, and will be faster, so you should use that version if possible.

If you're using Python 3 you should use the io.StringIO instead of StringIO and io.BytesIO instead of cStringIO .

Answer 2

我想你可能正在寻找StringIO 。