# Django 2.2.9.dev20191202104323 文档

# django.template.exceptions 源代码

    """
    This module contains generic exceptions used by template backends. Although,
    due to historical reasons, the Django template language also internally uses
    these exceptions, other exceptions specific to the DTL should not be added
    here.
    """

    class TemplateDoesNotExist(Exception):
        """
        The exception used when a template does not exist. Optional arguments:

        backend
            The template backend class used when raising this exception.

        tried
            A list of sources that were tried when finding the template. This
            is formatted as a list of tuples containing (origin, status), where
            origin is an Origin object or duck type and status is a string with the
            reason the template wasn't found.

        chain
            A list of intermediate TemplateDoesNotExist exceptions. This is used to
            encapsulate multiple exceptions when loading templates from multiple
            engines.
        """
        def __init__(self, msg, tried=None, backend=None, chain=None):
            self.backend = backend
            if tried is None:
                tried = []
            self.tried = tried
            if chain is None:
                chain = []
            self.chain = chain
            super().__init__(msg)

    class TemplateSyntaxError(Exception):
        """
        The exception used for syntax errors during parsing or rendering.
        """
        pass