What's Missing
Python equivalents for these standard XSPEC commands are not yet implemented:
hardcopy
Tcl script commands: addline, lrt, modid, multifake, rescalecov, simftest, writefits
The following commands perform functions which are not applicable to the currently intended design and usage of PyXspec, and therefore are not likely to be implemented in the near future:
addcomp
autosave
delcomp
editmod
script