template.py 文件源码

def context_tag(self, func):
        params, xx, xxx, defaults = getargspec(func)

        class ContextNode(Node):
            def __init__(self, vars_to_resolve):
                self.vars_to_resolve = map(Variable, vars_to_resolve)

            def render(self, context):
                resolved_vars = [var.resolve(context) for var in self.vars_to_resolve]
                return func(context, *resolved_vars)

        params = params[1:]
        compile_func = curry(generic_tag_compiler, params, defaults, getattr(func, "_decorated_function", func).__name__, ContextNode)
        compile_func.__doc__ = func.__doc__
        self.tag(getattr(func, "_decorated_function", func).__name__, compile_func)
        return func

# The following defines a template loader that loads templates from a specific
# app based on the prefix of the template path:
# get_template("app/template.html") => app/templates/template.html
# This keeps the code DRY and prevents name clashes.