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d ddh�didj�ZSejej0e ej"f ejTe ej"f dk�dldm�ZUdS )�r4 a� The core component of Jinja is the `Environment`. It contains
important shared variables like configuration, filters, tests,
globals and others. Instances of this class may be modified if
they are not shared and if no template was loaded so far.
Modifications on environments after the first template was loaded
will lead to surprising effects and undefined behavior.
Here are the possible initialization parameters:
`block_start_string`
The string marking the beginning of a block. Defaults to ``'{%'``.
`block_end_string`
The string marking the end of a block. Defaults to ``'%}'``.
`variable_start_string`
The string marking the beginning of a print statement.
Defaults to ``'{{'``.
`variable_end_string`
The string marking the end of a print statement. Defaults to
``'}}'``.
`comment_start_string`
The string marking the beginning of a comment. Defaults to ``'{#'``.
`comment_end_string`
The string marking the end of a comment. Defaults to ``'#}'``.
`line_statement_prefix`
If given and a string, this will be used as prefix for line based
statements. See also :ref:`line-statements`.
`line_comment_prefix`
If given and a string, this will be used as prefix for line based
comments. See also :ref:`line-statements`.
.. versionadded:: 2.2
`trim_blocks`
If this is set to ``True`` the first newline after a block is
removed (block, not variable tag!). Defaults to `False`.
`lstrip_blocks`
If this is set to ``True`` leading spaces and tabs are stripped
from the start of a line to a block. Defaults to `False`.
`newline_sequence`
The sequence that starts a newline. Must be one of ``'\r'``,
``'\n'`` or ``'\r\n'``. The default is ``'\n'`` which is a
useful default for Linux and OS X systems as well as web
applications.
`keep_trailing_newline`
Preserve the trailing newline when rendering templates.
The default is ``False``, which causes a single newline,
if present, to be stripped from the end of the template.
.. versionadded:: 2.7
`extensions`
List of Jinja extensions to use. This can either be import paths
as strings or extension classes. For more information have a
look at :ref:`the extensions documentation <jinja-extensions>`.
`optimized`
should the optimizer be enabled? Default is ``True``.
`undefined`
:class:`Undefined` or a subclass of it that is used to represent
undefined values in the template.
`finalize`
A callable that can be used to process the result of a variable
expression before it is output. For example one can convert
``None`` implicitly into an empty string here.
`autoescape`
If set to ``True`` the XML/HTML autoescaping feature is enabled by
default. For more details about autoescaping see
:class:`~markupsafe.Markup`. As of Jinja 2.4 this can also
be a callable that is passed the template name and has to
return ``True`` or ``False`` depending on autoescape should be
enabled by default.
.. versionchanged:: 2.4
`autoescape` can now be a function
`loader`
The template loader for this environment.
`cache_size`
The size of the cache. Per default this is ``400`` which means
that if more than 400 templates are loaded the loader will clean
out the least recently used template. If the cache size is set to
``0`` templates are recompiled all the time, if the cache size is
``-1`` the cache will not be cleaned.
.. versionchanged:: 2.8
The cache size was increased to 400 from a low 50.
`auto_reload`
Some loaders load templates from locations where the template
sources may change (ie: file system or database). If
``auto_reload`` is set to ``True`` (default) every time a template is
requested the loader checks if the source changed and if yes, it
will reload the template. For higher performance it's possible to
disable that.
`bytecode_cache`
If set to a bytecode cache object, this object will provide a
cache for the internal Jinja bytecode so that templates don't
have to be parsed if they were not changed.
See :ref:`bytecode-cache` for more information.
`enable_async`
If set to true this enables async template execution which
allows using async functions and generators.
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.. versionadded:: 2.7
T)r� )rv r� r r9 r� r� r� r= r= r> � call_filter s zEnvironment.call_filterc C s | � ||||||d�S )a� Invoke a test on a value the same way the compiler does.
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It's your responsibility to await this if needed.
.. versionchanged:: 3.0
Tests support ``@pass_context``, etc. decorators. Added
the ``context`` and ``eval_ctx`` parameters.
.. versionadded:: 2.7
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r. | j|d� Y nX dS )a� Parse the sourcecode and return the abstract syntax tree. This
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executable source- or bytecode. This is useful for debugging or to
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.. versionadded:: 2.5
)r� ri )r ri )rv r� r� r� r� r= r= r> � _generate� s zEnvironment._generate)r� r� r: c C s t ||d�S )z{Internal hook that can be overridden to hook a different compile
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.. versionadded:: 2.5
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rr | j|d� Y nX dS )a� Compile a node or template source code. The `name` parameter is
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the file system. If the template came from a database or memory this
can be omitted.
The return value of this method is a python code object. If the `raw`
parameter is `True` the return value will be a string with python
code equivalent to the bytecode returned otherwise. This method is
mainly used internally.
`defer_init` is use internally to aid the module code generator. This
causes the generated code to be able to import without the global
environment variable to be set.
.. versionadded:: 2.4
`defer_init` parameter added.
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in template "configuration files" or similar situations.
Example usage:
>>> env = Environment()
>>> expr = env.compile_expression('foo == 42')
>>> expr(foo=23)
False
>>> expr(foo=42)
True
Per default the return value is converted to `None` if the
expression returns an undefined value. This can be changed
by setting `undefined_to_none` to `False`.
>>> env.compile_expression('var')() is None
True
>>> env.compile_expression('var', undefined_to_none=False)()
Undefined
.. versionadded:: 2.1
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zipfile, the templates will be stored in a directory.
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`extensions` and `filter_func` are passed to :meth:`list_templates`.
Each template returned will be compiled to the target folder or
zipfile.
By default template compilation errors are ignored. In case a
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syntax errors to abort the compilation you can set `ignore_errors`
to `False` and you will get an exception on syntax errors.
.. versionadded:: 2.4
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ways: either `extensions` is set to a list of file extensions for
templates, or a `filter_func` can be provided which is a callable that
is passed a template name and should return `True` if it should end up
in the result list.
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.. versionadded:: 2.4
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