There is no background execution. The stty playback mode is not implemented. The CL keeplog parameter is ignored. The putlog command is also ignored. PyRAF does not limit the length of CL struct strings.
PyRAF strings can be arbitrarily long.
Automatic conversion of characters to integers in assignments is not supported. CL behavior involving adding integers to strings that end in numbers is not supported. This probably needs to be fixed in the CDL library. We plan to add more, though it is unclear if we will ever implement the full set of commands. The image display cannot be used for interactive plotting.