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    jinja2.ext
    ~~~~~~~~~~

    Jinja extensions allow to add custom tags similar to the way django custom
    tags work.  By default two example extensions exist: an i18n and a cache
    extension.

    :copyright: (c) 2010 by the Jinja Team.
    :license: BSD.
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    >>> list(extract_from_ast(node, babel_style=False))
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    For every string found this function yields a ``(lineno, function,
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       keywords.  For best results, make sure to not have more than one
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    .. versionchanged:: 2.5.1
       The `newstyle_gettext` flag can be set to `True` to enable newstyle
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    .. versionchanged:: 2.7
       A `silent` option can now be provided.  If set to `False` template
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