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.. code-block:: html+jinja
<pre>{% debug %}</pre>
.. code-block:: text
{'context': {'cycler': <class 'jinja2.utils.Cycler'>,
...,
'namespace': <class 'jinja2.utils.Namespace'>},
'filters': ['abs', 'attr', 'batch', 'capitalize', 'center', 'count', 'd',
..., 'urlencode', 'urlize', 'wordcount', 'wordwrap', 'xmlattr'],
'tests': ['!=', '<', '<=', '==', '>', '>=', 'callable', 'defined',
..., 'odd', 'sameas', 'sequence', 'string', 'undefined', 'upper']}
.. versionadded:: 2.11.0
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If you don't want that behavior set the `babel_style` parameter to `False`
which causes only strings to be returned and parameters are always stored
in tuples. As a consequence invalid gettext calls (calls without a single
string parameter or string parameters after non-string parameters) are
skipped.
This example explains the behavior:
>>> from jinja2 import Environment
>>> env = Environment()
>>> node = env.parse('{{ (_("foo"), _(), ngettext("foo", "bar", 42)) }}')
>>> list(extract_from_ast(node))
[(1, '_', 'foo'), (1, '_', ()), (1, 'ngettext', ('foo', 'bar', None))]
>>> list(extract_from_ast(node, babel_style=False))
[(1, '_', ('foo',)), (1, 'ngettext', ('foo', 'bar'))]
For every string found this function yields a ``(lineno, function,
message)`` tuple, where:
* ``lineno`` is the number of the line on which the string was found,
* ``function`` is the name of the ``gettext`` function used (if the
string was extracted from embedded Python code), and
* ``message`` is the string, or a tuple of strings for functions
with multiple string arguments.
This extraction function operates on the AST and is because of that unable
to extract any comments. For comment support you have to use the babel
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�fV �q�dS ) a Babel extraction method for Jinja templates.
.. versionchanged:: 2.3
Basic support for translation comments was added. If `comment_tags`
is now set to a list of keywords for extraction, the extractor will
try to find the best preceding comment that begins with one of the
keywords. For best results, make sure to not have more than one
gettext call in one line of code and the matching comment in the
same line or the line before.
.. versionchanged:: 2.5.1
The `newstyle_gettext` flag can be set to `True` to enable newstyle
gettext calls.
.. versionchanged:: 2.7
A `silent` option can now be provided. If set to `False` template
syntax errors are propagated instead of being ignored.
:param fileobj: the file-like object the messages should be extracted from
:param keywords: a list of keywords (i.e. function names) that should be
recognized as translation functions
:param comment_tags: a list of translator tags to search for and include
in the results.
:param options: a dictionary of additional options (optional)
:return: an iterator over ``(lineno, funcname, message, comments)`` tuples.
(comments will be empty currently)
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