human
Here's a good function header given the following:
I wrote the below code

    class DummyParser(gloo.glir.BaseGlirParser, ):
        def __init__(self):
            self.commands = []
        def parse(self, commands):
            self.commands.extend(commands)
    p = DummyParser()
    c = gloo.context.FakeCanvas()
    c.context.shared.parser = p
    gloo.clear()
    c.flush()
    gloo.clear()
    c.flush()
    assert (len(p.commands) in (2, 3))
    assert (p.commands[(-1)][1] == 'glClear')

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

def test_gloo_without_app():