user=> (defcommands python grep ls sort)
#'user/python
user=> (let [proc (python "-c" "print('hello, world!')")]
         (println (str "Python says \"" (first (:stdout proc)) "\"")))
Python says "hello, world!"
nil
user=> (doseq [line (pipe 
                      (ls "/Users/yourname/")
                      (grep "foo")
                      (sort "-r"))]
         (println line))
this_file_has_food.c
ilikefood
foo.clj
nil
user=> (process-write (python "yourscript.py") ["foo" "bar" "baz"])
nil
user=> (let [proc (long-running-process "args")]
         ((:kill proc))
	 (println (str "Status was " ((:status proc)) ".")))
Status was 1.