[Libguestfs] RHashtable and the python bindings

I've discovered that libguestfs apis which return RHashtable are currently returned as a list of tuples in the python bindings rather than the obvious dict. I propose fixing this, whilst also maintaining API compatibility for a period of time. The following apis return RHashtable: inspect_get_mountpoints list_filesystems inspect_get_drive_mappings tune2fs_l mountpoints md_detail blkid list_disk_labels I propose the following: h = guestfs.GuestFS(return_dict=True) If return_dict is set, any RHashtable api would return a dict rather than a list of tuples. If not, the behaviour would be unchanged. The default would be False. We would advertise immediately that this parameter is recommended for all new code, and that old code should be updated. At some point in the future the default would be changed to True, and at some point after that the old code could be removed. Matt