* Break the code at runtime and get a python shell by putting on the line above:
	import pdb; pdb.set_trace()

* Or even better: an ipython shell:
	import ipdb; ipdb.set_trace()

* If there is no stdout or the program messes with it:
	Use rpdb or ripdb https://pypi.python.org/pypi/ripdb
	Example:
		import ripdb; ripdb.set_trace()
		SAVED_STTY=$(stty -g); stty -icanon -opost -echo -echoe -echok -echoctl -echoke; nc 127.0.0.1 4444; stty $SAVED_STTY

* Beyond printf:
        from IPython.lib.pretty import pprint
        pprint(complex_object)
        # or
	from pprint import pprint
	pprint (vars(complex_object))


* To detect possible run-time errors without running the program check https://github.com/quora/pyanalyze
       pip3 install pyanalyze
       python3 -m pyanalyze file.py