flask title decorator, set title easy and simple

title.py

from functools import wraps


def title(title=None):
    def decorator(f):
        @wraps(f)
        def decorated_function(*args, **kwargs):
            g.page_title = title
            return f(*args, **kwargs)
        return decorated_function
    return decorator

just in base template set title some things like

<title>{{ site_name }}{% if g.page_title %} | {{ g.page_title }}{% endif %}</title>