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zlogging.Logger)ÚloggerÚbaser c sZ dkr,ddl }|jtj|jtj tddfdd G fddd|}|S )ak Given a logger object this returns a new undefined class that will
log certain failures. It will log iterations and printing. If no
logger is given a default logger is created.
Example::
logger = logging.getLogger(__name__)
LoggingUndefined = make_logging_undefined(
logger=logger,
base=Undefined
)
.. versionadded:: 2.8
:param logger: the logger to use. If not provided, a default logger
is created.
:param base: the base class to add logging functionality to. This
defaults to :class:`Undefined`.
Nr )Úundefr c s j d| j d S )Nz Template variable warning: %s)ÚwarningrÛ )r )r r r Ú _log_messageÔ s z,make_logging_undefined.<locals>._log_messagec st e Zd Zf Zejejdd fdd Zed fdd Zej ej d fdd Z
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r c @ s6 e Zd ZdZf ZedddZed dddZeZdS ) ÚChainableUndefineda An undefined that is chainable, where both ``__getattr__`` and
``__getitem__`` return itself rather than raising an
:exc:`UndefinedError`.
>>> foo = ChainableUndefined(name='foo')
>>> str(foo.bar['baz'])
''
>>> foo.bar['baz'] + 42
Traceback (most recent call last):
...
jinja2.exceptions.UndefinedError: 'foo' is undefined
.. versionadded:: 2.11.0
)r c C s t | S )N)r' )r r r r r2 s zChainableUndefined.__html__)ræ r c C s | S )Nr )r ræ r r r rß s z ChainableUndefined.__getattr__N) r! r" r# rZ rè r' r2 rß rT r r r r r ô s
r c @ s" e Zd ZdZf ZedddZdS )ÚDebugUndefineda An undefined that returns the debug info when printed.
>>> foo = DebugUndefined(name='foo')
>>> str(foo)
'{{ foo }}'
>>> not foo
True
>>> foo + 42
Traceback (most recent call last):
...
jinja2.exceptions.UndefinedError: 'foo' is undefined
)r c C sL | j rd| j }n,| jtkr&| j}ndt| j d| jd}d| dS )Nzundefined value printed: zno such element: ú[ú]z{{ z }})rÔ rÕ r rÖ r )r Úmessager r r rå s
zDebugUndefined.__str__N)r! r" r# rZ rè r' rå r r r r r s r c @ s: e Zd ZdZf Zej Z ZZ ej Z
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ejZdS )ÚStrictUndefinedas An undefined that barks on print and iteration as well as boolean
tests and all kinds of comparisons. In other words: you can do nothing
with it except checking if it's defined using the `defined` test.
>>> foo = StrictUndefined(name='foo')
>>> str(foo)
Traceback (most recent call last):
...
jinja2.exceptions.UndefinedError: 'foo' is undefined
>>> not foo
Traceback (most recent call last):
...
jinja2.exceptions.UndefinedError: 'foo' is undefined
>>> foo + 42
Traceback (most recent call last):
...
jinja2.exceptions.UndefinedError: 'foo' is undefined
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