It would be nice to have a cimpy export functionality, which does not create a file but only the xml string/stream. Possible API Ideas: 1. change `cim_export` so that it returns the string and create a new function `cim_file_export` which wraps that function and writes the content into a file. This likely breaks compatibility. 2. create a new function `create_xml` which creates the string. `cim_export` should then rely on that function. 3. make the parameter `filename` of `cim_export` optional and return the content if no filename is given. 4. if filename is not an string but an filehandle, write into this handle. Then one could use stuff like BytesIO to write in Memory