human
I wrote the below code

    from lettuce import registry
    registry.clear()
    @step('I    have    a    defined    step')
    def have_a_defined_step(*args, **kw):
        assert True
    @step('other    step    fails')
    def and_another(*args, **kw):
        assert False, 'It    should    fail'
    @step('define    a    step')
    def define_a_step(*args, **kw):
        assert True
    @step(u'When    I    have    a    step    that    raises    an    exception')
    def raises_exception(step):
        raise Exception()
    @step('I    have    a    step    which    calls    the    "(.*)"    step    with    behave_as')
    def runs_some_other_step_with_behave_as(step, something_else):
        step.behave_as(('When    %(i_do_something_else)s' % {'i_do_something_else': something_else}))

What's a good function header?
 Here's a good function header?
assistant
#Here's a good function header.

def step_runner_environ():