human
I wrote the below code

    from .typing.templates import CallableTemplate, infer, infer_global
    if ((not callable(func)) and (not isinstance(func, str))):
        raise TypeError('`func`    should    be    a    function    or    string')
    try:
        func_name = func.__name__
    except AttributeError:
        func_name = str(func)
    def decorate(typing_func):
        def generic(self):
            return typing_func(self.context)
        name = ('%s_CallableTemplate' % (func_name,))
        bases = (CallableTemplate,)
        class_dict = dict(key=func, generic=generic)
        template = type(name, bases, class_dict)
        infer(template)
        if hasattr(func, '__module__'):
            infer_global(func, types.Function(template))
    return decorate

What's a good function header?

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

def type_callable(func):