package reducer import ( _ "embed" "fmt" "os/exec" ) func CreatePython(bin string, args []string) *exec.Cmd { cmd := exec.Command(bin, "-c", python(args)) return cmd } //go:embed python.py var templatePython string func python(args []string) string { rs := "\n" for i, a := range args { rs += fmt.Sprintf( `try: f = (lambda x: (%v))(x) x = f(x) if callable(f) else f `, a) // Generate a beautiful error message. rs += "except Exception as e:\n" pre, post, pointer := trace(args, i) rs += fmt.Sprintf( ` sys.stderr.write('\n {} {} {}\n %v\n\n{}\n'.format(%q, %q, %q, e)) sys.exit(1)`, pointer, pre, a, post, ) rs += "\n" } return fmt.Sprintf(templatePython, rs) }