Somewhat puzzling error when program name not given

[arjunguha]

pyret
Key program not found

[rzuckerm]

I did some debugging on this, and it is caused by the pyret compiler itself when the options do not contain an output file. The options are passed to the compiler here, and the error message returned from the compiler is output here. Ideally, pyret should detect the insufficient arguments are given and output the help message.