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

    def wrap(f):
        def invoke_func(*args, **kwargs):
            download = args[0]
            with download.dllock:
                if (download.handle and download.handle.is_valid()):
                    return f(*args, **kwargs)
            return default
        return invoke_func
    return wrap

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

def checkHandleAndSynchronize(default=None):