Class Context

django/template/context.py:141–176

A stack container for variable context

class Context(BaseContext):
    "A stack container for variable context"

    def __init__(self, dict_=None, autoescape=True, use_l10n=None, use_tz=None):
        self.autoescape = autoescape
        self.use_l10n = use_l10n
        self.use_tz = use_tz
        self.template_name = "unknown"
        self.render_context = RenderContext()
        # Set to the original template -- as opposed to extended or included
        # templates -- during rendering, see bind_template.
        self.template = None
        super().__init__(dict_)

    @contextmanager
    def bind_template(self, template):
        if self.template is not None:
            raise RuntimeError("Context is already bound to a template")
        self.template = template
        try:
            yield
        finally:
            self.template = None

    def __copy__(self):
        duplicate = super().__copy__()
        duplicate.render_context = copy(self.render_context)
        return duplicate

    def update(self, other_dict):
        "Push other_dict to the stack of dictionaries in the Context"
        if not hasattr(other_dict, "__getitem__"):
            raise TypeError("other_dict must be a mapping (dictionary-like) object.")
        if isinstance(other_dict, BaseContext):
            other_dict = other_dict.dicts[1:].pop()
        return ContextDict(self, other_dict)


class RenderContext(BaseContext):