Changes¶

Version 3.1.5¶

Unreleased

Calling sync render for an async template uses asyncio.run. #1952
Avoid unclosed auto_aiter warnings. #1960
Return an aclose-able AsyncGenerator from Template.generate_async. #1960
Avoid leaving root_render_func() unclosed in Template.generate_async. #1960
Avoid leaving async generators unclosed in blocks, includes and extends. #1960

Version 3.1.4¶

Released 2024-05-05

The xmlattr filter does not allow keys with / solidus, > greater-than sign, or = equals sign, in addition to disallowing spaces. Regardless of any validation done by Jinja, user input should never be used as keys to this filter, or must be separately validated first. GHSA-h75v-3vvj-5mfj

Version 3.1.3¶

Released 2024-01-10

Fix compiler error when checking if required blocks in parent templates are empty. #1858
xmlattr filter does not allow keys with spaces. GHSA-h5c8-rqwp-cp95
Make error messages stemming from invalid nesting of {% trans %} blocks more helpful. #1918

Version 3.1.2¶

Released 2022-04-28

Add parameters to Environment.overlay to match __init__. #1645
Handle race condition in FileSystemBytecodeCache. #1654

Version 3.1.1¶

Released 2022-03-25

The template filename on Windows uses the primary path separator. #1637

Version 3.1.0¶

Released 2022-03-24

Drop support for Python 3.6. #1534
Remove previously deprecated code. #1544
- WithExtension and AutoEscapeExtension are built-in now.
- contextfilter and contextfunction are replaced by pass_context. evalcontextfilter and evalcontextfunction are replaced by pass_eval_context. environmentfilter and environmentfunction are replaced by pass_environment.
- Markup and escape should be imported from MarkupSafe.
- Compiled templates from very old Jinja versions may need to be recompiled.
- Legacy resolve mode for Context subclasses is no longer supported. Override resolve_or_missing instead of resolve.
- unicode_urlencode is renamed to url_quote.
Add support for native types in macros. #1510
The {% trans %} tag can use pgettext and npgettext by passing a context string as the first token in the tag, like {% trans "title" %}. #1430
Update valid identifier characters from Python 3.6 to 3.7. #1571
Filters and tests decorated with @async_variant are pickleable. #1612
Add items filter. #1561
Subscriptions ([0], etc.) can be used after filters, tests, and calls when the environment is in async mode. #1573
The groupby filter is case-insensitive by default, matching other comparison filters. Added the case_sensitive parameter to control this. #1463
Windows drive-relative path segments in template names will not result in FileSystemLoader and PackageLoader loading from drive-relative paths. #1621

Version 3.0.3¶

Released 2021-11-09

Fix traceback rewriting internals for Python 3.10 and 3.11. #1535
Fix how the native environment treats leading and trailing spaces when parsing values on Python 3.10. #1537
Improve async performance by avoiding checks for common types. #1514
Revert change to hash(Node) behavior. Nodes are hashed by id again #1521
PackageLoader works when the package is a single module file. #1512

Version 3.0.2¶

Released 2021-10-04

Fix a loop scoping bug that caused assignments in nested loops to still be referenced outside of it. #1427
Make compile_templates deterministic for filter and import names. #1452, 1453
Revert an unintended change that caused Undefined to act like StrictUndefined for the in operator. #1448
Imported macros have access to the current template globals in async environments. #1494
PackageLoader will not include a current directory (.) path segment. This allows loading templates from the root of a zip import. #1467

Version 3.0.1¶

Released 2021-05-18

Update MarkupSafe dependency to >= 2.0. #1418
Mark top-level names as exported so type checking understands imports in user projects. #1426
Fix some types that weren’t available in Python 3.6.0. #1433
The deprecation warning for unneeded autoescape and with_ extensions shows more relevant context. #1429
Fixed calling deprecated jinja2.Markup without an argument. Use markupsafe.Markup instead. #1438
Calling sync render for an async template uses asyncio.new_event_loop This fixes a deprecation that Python 3.10 introduces. #1443

Version 3.0.0¶

Released 2021-05-11

Drop support for Python 2.7 and 3.5.
Bump MarkupSafe dependency to >=1.1.
Bump Babel optional dependency to >=2.1.
Remove code that was marked deprecated.
Add type hinting. #1412
Use PEP 451 API to load templates with PackageLoader. #1168
Fix a bug that caused imported macros to not have access to the current template’s globals. #688
Add ability to ignore trim_blocks using +%}. #1036
Fix a bug that caused custom async-only filters to fail with constant input. #1279
Fix UndefinedError incorrectly being thrown on an undefined variable instead of Undefined being returned on NativeEnvironment on Python 3.10. #1335
Blocks can be marked as required. They must be overridden at some point, but not necessarily by the direct child. #1147
Deprecate the autoescape and with extensions, they are built-in to the compiler. #1203
The urlize filter recognizes mailto: links and takes extra_schemes (or env.policies["urlize.extra_schemes"]) to recognize other schemes. It tries to balance parentheses within a URL instead of ignoring trailing characters. The parsing in general has been updated to be more efficient and match more cases. URLs without a scheme are linked as https:// instead of http://. #522, 827, 1172, #1195
Filters that get attributes, such as map and groupby, can use a false or empty value as a default. #1331
Fix a bug that prevented variables set in blocks or loops from being accessed in custom context functions. #768
Fix a bug that caused scoped blocks from accessing special loop variables. #1088
Update the template globals when calling Environment.get_template(globals=...) even if the template was already loaded. #295
Do not raise an error for undefined filters in unexecuted if-statements and conditional expressions. #842
Add is filter and is test tests to test if a name is a registered filter or test. This allows checking if a filter is available in a template before using it. Test functions can be decorated with @pass_environment, @pass_eval_context, or @pass_context. #842, #1248
Support pgettext and npgettext (message contexts) in i18n extension. #441
The |indent filter’s width argument can be a string to indent by. #1167
The parser understands hex, octal, and binary integer literals. #1170
Undefined.__contains__ (in) raises an UndefinedError instead of a TypeError. #1198
Undefined is iterable in an async environment. #1294
NativeEnvironment supports async mode. #1362
Template rendering only treats \n, \r\n and \r as line breaks. Other characters are left unchanged. #769, 952, 1313
|groupby filter takes an optional default argument. #1359
The function and filter decorators have been renamed and unified. The old names are deprecated. #1381
- pass_context replaces contextfunction and contextfilter.
- pass_eval_context replaces evalcontextfunction and evalcontextfilter
- pass_environment replaces environmentfunction and environmentfilter.
Async support no longer requires Jinja to patch itself. It must still be enabled with Environment(enable_async=True). #1390
Overriding Context.resolve is deprecated, override resolve_or_missing instead. #1380

Version 2.11.3¶

Released 2021-01-31

Improve the speed of the urlize filter by reducing regex backtracking. Email matching requires a word character at the start of the domain part, and only word characters in the TLD. #1343

Version 2.11.2¶

Released 2020-04-13

Fix a bug that caused callable objects with __getattr__, like Mock to be treated as a contextfunction(). #1145
Update wordcount filter to trigger Undefined methods by wrapping the input in soft_str(). #1160
Fix a hang when displaying tracebacks on Python 32-bit. #1162
Showing an undefined error for an object that raises AttributeError on access doesn’t cause a recursion error. #1177
Revert changes to PackageLoader from 2.10 which removed the dependency on setuptools and pkg_resources, and added limited support for namespace packages. The changes caused issues when using Pytest. Due to the difficulty in supporting Python 2 and PEP 451 simultaneously, the changes are reverted until 3.0. #1182
Fix line numbers in error messages when newlines are stripped. #1178
The special namespace() assignment object in templates works in async environments. #1180
Fix whitespace being removed before tags in the middle of lines when lstrip_blocks is enabled. #1138
NativeEnvironment doesn’t evaluate intermediate strings during rendering. This prevents early evaluation which could change the value of an expression. #1186

Version 2.11.1¶

Released 2020-01-30

Fix a bug that prevented looking up a key after an attribute ({{ data.items[1:] }}) in an async template. #1141

Version 2.11.0¶

Released 2020-01-27

Drop support for Python 2.6, 3.3, and 3.4. This will be the last version to support Python 2.7 and 3.5.
Added a new ChainableUndefined class to support getitem and getattr on an undefined object. #977
Allow {%+ syntax (with NOP behavior) when lstrip_blocks is disabled. #748
Added a default parameter for the map filter. #557
Exclude environment globals from meta.find_undeclared_variables(). #931
Float literals can be written with scientific notation, like 2.56e-3. #912, #922
Int and float literals can be written with the ‘_’ separator for legibility, like 12_345. #923
Fix a bug causing deadlocks in LRUCache.setdefault. #1000
The trim filter takes an optional string of characters to trim. #828
A new jinja2.ext.debug extension adds a {% debug %} tag to quickly dump the current context and available filters and tests. #174, #798, 983
Lexing templates with large amounts of whitespace is much faster. #857, #858
Parentheses around comparisons are preserved, so {{ 2 * (3 < 5) }} outputs “2” instead of “False”. #755, #938
Add new boolean, false, true, integer and float tests. #824
The environment’s finalize function is only applied to the output of expressions (constant or not), not static template data. #63
When providing multiple paths to FileSystemLoader, a template can have the same name as a directory. #821
Always return Undefined when omitting the else clause in a {{ 'foo' if bar }} expression, regardless of the environment’s undefined class. Omitting the else clause is a valid shortcut and should not raise an error when using StrictUndefined. #710, #1079
Fix behavior of loop control variables such as length and revindex0 when looping over a generator. #459, 751, 794, #993
Async support is only loaded the first time an environment enables it, in order to avoid a slow initial import. #765
In async environments, the |map filter will await the filter call if needed. #913
In for loops that access loop attributes, the iterator is not advanced ahead of the current iteration unless length, revindex, nextitem, or last are accessed. This makes it less likely to break groupby results. #555, #1101
In async environments, the loop attributes length and revindex work for async iterators. #1101
In async environments, values from attribute/property access will be awaited if needed. #1101
PackageLoader doesn’t depend on setuptools or pkg_resources. #970
PackageLoader has limited support for PEP 420 namespace packages. #1097
Support os.PathLike objects in FileSystemLoader and ModuleLoader. #870
NativeTemplate correctly handles quotes between expressions. "'{{ a }}', '{{ b }}'" renders as the tuple ('1', '2') rather than the string '1, 2'. #1020
Creating a NativeTemplate directly creates a NativeEnvironment instead of a default Environment. #1091
After calling LRUCache.copy(), the copy’s queue methods point to the correct queue. #843
Compiling templates always writes UTF-8 instead of defaulting to the system encoding. #889
|wordwrap filter treats existing newlines as separate paragraphs to be wrapped individually, rather than creating short intermediate lines. #175
Add break_on_hyphens parameter to |wordwrap filter. #550
Cython compiled functions decorated as context functions will be passed the context. #1108
When chained comparisons of constants are evaluated at compile time, the result follows Python’s behavior of returning False if any comparison returns False, rather than only the last one. #1102
Tracebacks for exceptions in templates show the correct line numbers and source for Python >= 3.7. #1104
Tracebacks for template syntax errors in Python 3 no longer show internal compiler frames. #763
Add a DerivedContextReference node that can be used by extensions to get the current context and local variables such as loop. #860
Constant folding during compilation is applied to some node types that were previously overlooked. #733
TemplateSyntaxError.source is not empty when raised from an included template. #457
Passing an Undefined value to get_template (such as through extends, import, or include), raises an UndefinedError consistently. select_template will show the undefined message in the list of attempts rather than the empty string. #1037
TemplateSyntaxError can be pickled. #1117

Version 2.10.3¶

Released 2019-10-04

Fix a typo in Babel entry point in setup.py that was preventing installation.

Version 2.10.2¶

Released 2019-10-04

Fix Python 3.7 deprecation warnings.
Using range in the sandboxed environment uses xrange on Python 2 to avoid memory use. #933
Use Python 3.7’s better traceback support to avoid a core dump when using debug builds of Python 3.7. #1050

Version 2.10.1¶

Released 2019-04-06

SandboxedEnvironment securely handles str.format_map in order to prevent code execution through untrusted format strings. The sandbox already handled str.format.

Version 2.10¶

Released 2017-11-08

Added a new extension node called OverlayScope which can be used to create an unoptimized scope that will look up all variables from a derived context.
Added an in test that works like the in operator. This can be used in combination with reject and select.
Added previtem and nextitem to loop contexts, providing access to the previous/next item in the loop. If such an item does not exist, the value is undefined.
Added changed(*values) to loop contexts, providing an easy way of checking whether a value has changed since the last iteration (or rather since the last call of the method)
Added a namespace function that creates a special object which allows attribute assignment using the set tag. This can be used to carry data across scopes, e.g. from a loop body to code that comes after the loop.
Added a trimmed modifier to {% trans %} to strip linebreaks and surrounding whitespace. Also added a new policy to enable this for all trans blocks.
The random filter is no longer incorrectly constant folded and will produce a new random choice each time the template is rendered. #478
Added a unique filter. #469
Added min and max filters. #475
Added tests for all comparison operators: eq, ne, lt, le, gt, ge. #665
import statement cannot end with a trailing comma. #617, #618
indent filter will not indent blank lines by default. #685
Add reverse argument for dictsort filter. #692
Add a NativeEnvironment that renders templates to native Python types instead of strings. #708
Added filter support to the block set tag. #489
tojson filter marks output as safe to match documented behavior. #718
Resolved a bug where getting debug locals for tracebacks could modify template context.
Fixed a bug where having many {% elif ... %} blocks resulted in a “too many levels of indentation” error. These blocks now compile to native elif ..: instead of else: if ..: #759

Version 2.9.6¶

Released 2017-04-03

Fixed custom context behavior in fast resolve mode #675

Version 2.9.5¶

Released 2017-01-28

Restored the original repr of the internal _GroupTuple because this caused issues with ansible and it was an unintended change. #654
Added back support for custom contexts that override the old resolve method since it was hard for people to spot that this could cause a regression.
Correctly use the buffer for the else block of for loops. This caused invalid syntax errors to be caused on 2.x and completely wrong behavior on Python 3 #669
Resolve an issue where the {% extends %} tag could not be used with async environments. #668
Reduce memory footprint slightly by reducing our unicode database dump we use for identifier matching on Python 3 #666
Fixed autoescaping not working for macros in async compilation mode. #671

Version 2.9.4¶

Released 2017-01-10

Solved some warnings for string literals. #646
Increment the bytecode cache version which was not done due to an oversight before.
Corrected bad code generation and scoping for filtered loops. #649
Resolved an issue where top-level output silencing after known extend blocks could generate invalid code when blocks where contained in if statements. #651
Made the truncate.leeway default configurable to improve compatibility with older templates.

Version 2.9.3¶

Released 2017-01-08

Restored the use of blocks in macros to the extend that was possible before. On Python 3 it would render a generator repr instead of the block contents. #645
Set a consistent behavior for assigning of variables in inner scopes when the variable is also read from an outer scope. This now sets the intended behavior in all situations however it does not restore the old behavior where limited assignments to outer scopes was possible. For more information and a discussion see #641
Resolved an issue where block scoped would not take advantage of the new scoping rules. In some more exotic cases a variable overridden in a local scope would not make it into a block.
Change the code generation of the with statement to be in line with the new scoping rules. This resolves some unlikely bugs in edge cases. This also introduces a new internal With node that can be used by extensions.

Version 2.9.2¶

Released 2017-01-08

Fixed a regression that caused for loops to not be able to use the same variable for the target as well as source iterator. #640
Add support for a previously unknown behavior of macros. It used to be possible in some circumstances to explicitly provide a caller argument to macros. While badly buggy and unintended it turns out that this is a common case that gets copy pasted around. To not completely break backwards compatibility with the most common cases it’s now possible to provide an explicit keyword argument for caller if it’s given an explicit default. #642

Version 2.9.1¶

Released 2017-01-07

Resolved a regression with call block scoping for macros. Nested caller blocks that used the same identifiers as outer macros could refer to the wrong variable incorrectly.

Version 2.9¶

Released 2017-01-07, codename Derivation

Change cache key definition in environment. This fixes a performance regression introduced in 2.8.
Added support for generator_stop on supported Python versions (Python 3.5 and later)
Corrected a long standing issue with operator precedence of math operations not being what was expected.
Added support for Python 3.6 async iterators through a new async mode.
Added policies for filter defaults and similar things.
Urlize now sets “rel noopener” by default.
Support attribute fallback for old-style classes in 2.x.
Support toplevel set statements in extend situations.
Restored behavior of Cycler for Python 3 users.
Subtraction now follows the same behavior as other operators on undefined values.
map and friends will now give better error messages if you forgot to quote the parameter.
Depend on MarkupSafe 0.23 or higher.
Improved the truncate filter to support better truncation in case the string is barely truncated at all.
Change the logic for macro autoescaping to be based on the runtime autoescaping information at call time instead of macro define time.
Ported a modified version of the tojson filter from Flask to Jinja and hooked it up with the new policy framework.
Block sets are now marked safe by default.
On Python 2 the asciification of ASCII strings can now be disabled with the compiler.ascii_str policy.
Tests now no longer accept an arbitrary expression as first argument but a restricted one. This means that you can now properly use multiple tests in one expression without extra parentheses. In particular you can now write foo is divisibleby 2 or foo is divisibleby 3 as you would expect.
Greatly changed the scoping system to be more consistent with what template designers and developers expect. There is now no more magic difference between the different include and import constructs. Context is now always propagated the same way. The only remaining differences is the defaults for with context and without context.
The with and autoescape tags are now built-in.
Added the new select_autoescape function which helps configuring better autoescaping easier.
Fixed a runtime error in the sandbox when attributes of async generators were accessed.

Version 2.8.1¶

Released 2016-12-29

Fixed the for_qs flag for urlencode.
Fixed regression when applying int to non-string values.
SECURITY: if the sandbox mode is used format expressions are now sandboxed with the same rules as in Jinja. This solves various information leakage problems that can occur with format strings.

Version 2.8¶

Released 2015-07-26, codename Replacement

Added target parameter to urlize function.
Added support for followsymlinks to the file system loader.
The truncate filter now counts the length.
Added equalto filter that helps with select filters.
Changed cache keys to use absolute file names if available instead of load names.
Fixed loop length calculation for some iterators.
Changed how Jinja enforces strings to be native strings in Python 2 to work when people break their default encoding.
Added make_logging_undefined which returns an undefined object that logs failures into a logger.
If unmarshalling of cached data fails the template will be reloaded now.
Implemented a block set tag.
Default cache size was increased to 400 from a low 50.
Fixed is number test to accept long integers in all Python versions.
Changed is number to accept Decimal as a number.
Added a check for default arguments followed by non-default arguments. This change makes {% macro m(x, y=1, z) %} a syntax error. The previous behavior for this code was broken anyway (resulting in the default value being applied to y).
Add ability to use custom subclasses of jinja2.compiler.CodeGenerator and jinja2.runtime.Context by adding two new attributes to the environment (code_generator_class and context_class). #404
Added support for context/environment/evalctx decorator functions on the finalize callback of the environment.
Escape query strings for urlencode properly. Previously slashes were not escaped in that place.
Add ‘base’ parameter to ‘int’ filter.

Version 2.7.3¶

Released 2014-06-06

Security issue: Corrected the security fix for the cache folder. This fix was provided by RedHat.

Version 2.7.2¶

Released 2014-01-10

Prefix loader was not forwarding the locals properly to inner loaders. This is now fixed.
Security issue: Changed the default folder for the filesystem cache to be user specific and read and write protected on UNIX systems. See Debian bug 734747 for more information.

Version 2.7.1¶

Released 2013-08-07

Fixed a bug with call_filter not working properly on environment and context filters.
Fixed lack of Python 3 support for bytecode caches.
Reverted support for defining blocks in included templates as this broke existing templates for users.
Fixed some warnings with hashing of undefineds and nodes if Python is run with warnings for Python 3.
Added support for properly hashing undefined objects.
Fixed a bug with the title filter not working on already uppercase strings.

Version 2.7¶

Released 2013-05-20, codename Translation

Choice and prefix loaders now dispatch source and template lookup separately in order to work in combination with module loaders as advertised.
Fixed filesizeformat.
Added a non-silent option for babel extraction.
Added urlencode filter that automatically quotes values for URL safe usage with utf-8 as only supported encoding. If applications want to change this encoding they can override the filter.
Added keep-trailing-newline configuration to environments and templates to optionally preserve the final trailing newline.
Accessing last on the loop context no longer causes the iterator to be consumed into a list.
Python requirement changed: 2.6, 2.7 or >= 3.3 are required now, supported by same source code, using the “six” compatibility library.
Allow contextfunction and other decorators to be applied to __call__.
Added support for changing from newline to different signs in the wordwrap filter.
Added support for ignoring memcache errors silently.
Added support for keeping the trailing newline in templates.
Added finer grained support for stripping whitespace on the left side of blocks.
Added map, select, reject, selectattr and rejectattr filters.
Added support for loop.depth to figure out how deep inside a recursive loop the code is.
Disabled py_compile for pypy and python 3.

Version 2.6¶

Released 2011-07-24, codename Convolution

Internal attributes now raise an internal attribute error now instead of returning an undefined. This fixes problems when passing undefined objects to Python semantics expecting APIs.
Traceback support now works properly for PyPy. (Tested with 1.4)
Implemented operator intercepting for sandboxed environments. This allows application developers to disable builtin operators for better security. (For instance limit the mathematical operators to actual integers instead of longs)
Groupby filter now supports dotted notation for grouping by attributes of attributes.
Scoped blocks now properly treat toplevel assignments and imports. Previously an import suddenly “disappeared” in a scoped block.
Automatically detect newer Python interpreter versions before loading code from bytecode caches to prevent segfaults on invalid opcodes. The segfault in earlier Jinja versions here was not a Jinja bug but a limitation in the underlying Python interpreter. If you notice Jinja segfaulting in earlier versions after an upgrade of the Python interpreter you don’t have to upgrade, it’s enough to flush the bytecode cache. This just no longer makes this necessary, Jinja will automatically detect these cases now.
The sum filter can now sum up values by attribute. This is a backwards incompatible change. The argument to the filter previously was the optional starting index which defaults to zero. This now became the second argument to the function because it’s rarely used.
Like sum, sort now also makes it possible to order items by attribute.
Like sum and sort, join now also is able to join attributes of objects as string.
The internal eval context now has a reference to the environment.
Added a mapping test to see if an object is a dict or an object with a similar interface.

Version 2.5.5¶

Released 2010-10-18

Built documentation is no longer part of release.

Version 2.5.4¶

Released 2010-10-17

Fixed extensions not loading properly with overlays.
Work around a bug in cpython for the debugger that causes segfaults on 64bit big-endian architectures.

Version 2.5.3¶

Released 2010-10-17

Fixed an operator precedence error introduced in 2.5.2. Statements like “-foo.bar” had their implicit parentheses applied around the first part of the expression (“(-foo).bar”) instead of the more correct “-(foo.bar)”.

Version 2.5.2¶

Released 2010-08-18

Improved setup.py script to better work with assumptions people might still have from it (--with-speedups).
Fixed a packaging error that excluded the new debug support.

Version 2.5.1¶

Released 2010-08-17

StopIteration exceptions raised by functions called from templates are now intercepted and converted to undefineds. This solves a lot of debugging grief. (StopIteration is used internally to abort template execution)
Improved performance of macro calls slightly.
Babel extraction can now properly extract newstyle gettext calls.
Using the variable num in newstyle gettext for something else than the pluralize count will no longer raise a KeyError.
Removed builtin markup class and switched to markupsafe. For backwards compatibility the pure Python implementation still exists but is pulled from markupsafe by the Jinja developers. The debug support went into a separate feature called “debugsupport” and is disabled by default because it is only relevant for Python 2.4
Fixed an issue with unary operators having the wrong precedence.

Version 2.5¶

Released 2010-05-29, codename Incoherence

Improved the sort filter (should have worked like this for a long time) by adding support for case insensitive searches.
Fixed a bug for getattribute constant folding.
Support for newstyle gettext translations which result in a nicer in-template user interface and more consistent catalogs.
It’s now possible to register extensions after an environment was created.

Version 2.4.1¶

Released 2010-04-20

Fixed an error reporting bug for undefined.

Version 2.4¶

Released 2010-04-13, codename Correlation

The environment template loading functions now transparently pass through a template object if it was passed to it. This makes it possible to import or extend from a template object that was passed to the template.
Added a ModuleLoader that can load templates from precompiled sources. The environment now features a method to compile the templates from a configured loader into a zip file or folder.
The _speedups C extension now supports Python 3.
Added support for autoescaping toggling sections and support for evaluation contexts.
Extensions have a priority now.

Version 2.3.1¶

Released 2010-02-19

Fixed an error reporting bug on all python versions
Fixed an error reporting bug on Python 2.4

Version 2.3¶

Released 2010-02-10, codename 3000 Pythons

Fixes issue with code generator that causes unbound variables to be generated if set was used in if-blocks and other small identifier problems.
Include tags are now able to select between multiple templates and take the first that exists, if a list of templates is given.
Fixed a problem with having call blocks in outer scopes that have an argument that is also used as local variable in an inner frame #360.
Greatly improved error message reporting #339
Implicit tuple expressions can no longer be totally empty. This change makes {% if %} a syntax error now. #364
Added support for translator comments if extracted via babel.
Added with-statement extension.
Experimental Python 3 support.

Version 2.2.1¶

Released 2009-09-14

Fixes some smaller problems for Jinja on Jython.

Version 2.2¶

Released 2009-09-13, codename Kong

Include statements can now be marked with ignore missing to skip non existing templates.
Priority of not raised. It’s now possible to write not foo in bar as an alias to foo not in bar like in python. Previously the grammar required parentheses (not (foo in bar)) which was odd.
Fixed a bug that caused syntax errors when defining macros or using the {% call %} tag inside loops.
Fixed a bug in the parser that made {{ foo[1, 2] }} impossible.
Made it possible to refer to names from outer scopes in included templates that were unused in the callers frame #327
Fixed a bug that caused internal errors if names where used as iteration variable and regular variable after the loop if that variable was unused before the loop. #331
Added support for optional scoped modifier to blocks.
Added support for line-comments.
Added the meta module.
Renamed (undocumented) attribute “overlay” to “overlayed” on the environment because it was clashing with a method of the same name.
Speedup extension is now disabled by default.

Version 2.1.1¶

Released 2008-12-25

Fixed a translation error caused by looping over empty recursive loops.

Version 2.1¶

Released 2008-11-23, codename Yasuzō

Fixed a bug with nested loops and the special loop variable. Before the change an inner loop overwrote the loop variable from the outer one after iteration.
Fixed a bug with the i18n extension that caused the explicit pluralization block to look up the wrong variable.
Fixed a limitation in the lexer that made {{ foo.0.0 }} impossible.
Index based subscribing of variables with a constant value returns an undefined object now instead of raising an index error. This was a bug caused by eager optimizing.
The i18n extension looks up foo.ugettext now followed by foo.gettext if an translations object is installed. This makes dealing with custom translations classes easier.
Fixed a confusing behavior with conditional extending. loops were partially executed under some conditions even though they were not part of a visible area.
Added sort filter that works like dictsort but for arbitrary sequences.
Fixed a bug with empty statements in macros.
Implemented a bytecode cache system.
The template context is now weakref-able
Inclusions and imports “with context” forward all variables now, not only the initial context.
Added a cycle helper called cycler.
Added a joining helper called joiner.
Added a compile_expression method to the environment that allows compiling of Jinja expressions into callable Python objects.
Fixed an escaping bug in urlize

Version 2.0¶

Released 2008-07-17, codename Jinjavitus

The subscribing of objects (looking up attributes and items) changed from slightly. It’s now possible to give attributes or items a higher priority by either using dot-notation lookup or the bracket syntax. This also changed the AST slightly. Subscript is gone and was replaced with Getitem and Getattr.
Added support for preprocessing and token stream filtering for extensions. This would allow extensions to allow simplified gettext calls in template data and something similar.
Added TemplateStream.dump.
Added missing support for implicit string literal concatenation. {{ "foo" "bar" }} is equivalent to {{ "foobar" }}
else is optional for conditional expressions. If not given it evaluates to false.
Improved error reporting for undefined values by providing a position.
filesizeformat filter uses decimal prefixes now per default and can be set to binary mode with the second parameter.
Fixed bug in finalizer

Version 2.0rc1¶

Released 2008-06-09

First release of Jinja 2.