Overview Using the template system in Python is a three-step process: • You configure an. • You compile template code into a. • You render the template with a. Django projects generally rely on the for each of these steps instead of the template system’s lower level APIs: • For each backend in the setting, Django instantiates an. Wraps and adapts it to the common template backend API. • The module provides functions such as for loading templates.

They return a django.template.backends.django.Template which wraps the actual. • The Template obtained in the previous step has a method which marshals a context and possibly a request into a and delegates the rendering to the underlying. Configuring an engine If you are simply using the backend, this probably isn’t the documentation you’re looking for. An instance of the Engine class described below is accessible using the engine attribute of that backend and any attribute defaults mentioned below are overridden by what’s passed. Make Music Finale 2011 Italiano Download Music. Class Engine( dirs=None, app_dirs=False, context_processors=None, debug=False, loaders=None, string_if_invalid=', file_charset='utf-8', libraries=None, builtins=None, autoescape=True) When instantiating an Engine all arguments must be passed as keyword arguments: • dirs is a list of directories where the engine should look for template source files. It is used to configure.

It defaults to an empty list. • app_dirs only affects the default value of loaders. It defaults to False.

• autoescape controls whether HTML autoescaping is enabled. It defaults to True. Warning Only set it to False if you’re rendering non-HTML templates!

Pc98 Fdi Download. • context_processors is a list of dotted Python paths to callables that are used to populate the context when a template is rendered with a request. These callables take a request object as their argument and return a of items to be merged into the context. It defaults to an empty list.

Build Status Support me. Airspeed - a Python template engine. What is Airspeed? Airspeed is a powerful and easy-to-use templating engine for Python that aims for a high level of compatibility with the popular Velocity library for Java. Selling points. Compatible with Velocity templates; Compatible with Python.

See for more information. • debug is a boolean that turns on/off template debug mode.

If it is True, the template engine will store additional debug information which can be used to display a detailed report for any exception raised during template rendering. It defaults to False. • loaders is a list of template loader classes, specified as strings. Each Loader class knows how to import templates from a particular source. Optionally, a tuple can be used instead of a string.

The first item in the tuple should be the Loader class name, subsequent items are passed to the Loader during initialization. It defaults to a list containing: • 'django.template.loaders.filesystem.Loader' • 'django.template.loaders.app_directories.Loader' if and only if app_dirs is True. If debug is False, these loaders are wrapped in. See for details. Changed in Django 1.11: Enabling of the cached template loader when debug is False was added. • string_if_invalid is the output, as a string, that the template system should use for invalid (e.g.

Misspelled) variables. It defaults to the empty string. See for details.

• file_charset is the charset used to read template files on disk. It defaults to 'utf-8'. • 'libraries': A dictionary of labels and dotted Python paths of template tag modules to register with the template engine. This is used to add new libraries or provide alternate labels for existing ones. How invalid variables are handled Generally, if a variable doesn’t exist, the template system inserts the value of the engine’s string_if_invalid configuration option, which is set to ' (the empty string) by default. Filters that are applied to an invalid variable will only be applied if string_if_invalid is set to ' (the empty string). If string_if_invalid is set to any other value, variable filters will be ignored.

This behavior is slightly different for the if, for and regroup template tags. If an invalid variable is provided to one of these template tags, the variable will be interpreted as None. Filters are always applied to invalid variables within these template tags. If string_if_invalid contains a '%s', the format marker will be replaced with the name of the invalid variable. For debug purposes only! While string_if_invalid can be a useful debugging tool, it is a bad idea to turn it on as a ‘development default’. Many templates, including those in the Admin site, rely upon the silence of the template system when a nonexistent variable is encountered.

If you assign a value other than ' to string_if_invalid, you will experience rendering problems with these templates and sites. Generally, string_if_invalid should only be enabled in order to debug a specific template problem, then cleared once debugging is complete. [ 'django.template.context_processors.debug', 'django.template.context_processors.request', 'django.contrib.auth.context_processors.auth', 'django.contrib.messages.context_processors.messages', ] In addition to these, always enables 'django.template.context_processors.csrf'.

This is a security related context processor required by the admin and other contrib apps, and, in case of accidental misconfiguration, it is deliberately hardcoded in and cannot be turned off in the context_processors option. Each processor is applied in order. That means, if one processor adds a variable to the context and a second processor adds a variable with the same name, the second will override the first. The default processors are explained below.

Writing your own context processors A context processor has a very simple interface: It’s a Python function that takes one argument, an object, and returns a dictionary that gets added to the template context. Each context processor must return a dictionary. Custom context processors can live anywhere in your code base. All Django cares about is that your custom context processors are pointed to by the 'context_processors' option in your setting — or the context_processors argument of if you’re using it directly.

Loader types By default, Django uses a filesystem-based template loader, but Django comes with a few other template loaders, which know how to load templates from other sources. Some of these other loaders are disabled by default, but you can activate them by adding a 'loaders' option to your DjangoTemplates backend in the setting or passing a loaders argument to. Loaders should be a list of strings or tuples, where each represents a template loader class. Here are the template loaders that come with Django: django.template.loaders.filesystem.Loader class filesystem. Loader Loads templates from the filesystem, according to. This loader is enabled by default. However it won’t find any templates until you set to a non-empty list.

Changed in Django 1.11: The ability to specify directories for a particular filesystem loader was added. Django.template.loaders.app_directories.Loader class app_directories. Loader Loads templates from Django apps on the filesystem. For each app in, the loader looks for a templates subdirectory. If the directory exists, Django looks for templates in there. This means you can store templates with your individual apps.

This also makes it easy to distribute Django apps with default templates. For example, for this setting. INSTALLED_APPS = [ 'myproject.polls', 'myproject.music' ] then get_template('foo.html') will look for foo.html in these directories, in this order: • /path/to/myproject/polls/templates/ • /path/to/myproject/music/templates/ and will use the one it finds first.

The order of is significant! For example, if you want to customize the Django admin, you might choose to override the standard admin/base_site.html template, from django.contrib.admin, with your own admin/base_site.html in myproject.polls. You must then make sure that your myproject.polls comes before django.contrib.admin in, otherwise django.contrib.admin’s will be loaded first and yours will be ignored. Note that the loader performs an optimization when it first runs: it caches a list of which packages have a templates subdirectory. You can enable this loader simply by setting to True. Loader methods class Loader Loads templates from a given source, such as the filesystem or a database. Get_template_sources( template_name) A method that takes a template_name and yields instances for each possible source.

For example, the filesystem loader may receive 'index.html' as a template_name argument. This method would yield origins for the full path of index.html as it appears in each template directory the loader looks.

The method doesn’t need to verify that the template exists at a given path, but it should ensure the path is valid. For instance, the filesystem loader makes sure the path lies under a valid template directory.

Get_contents( origin) Returns the contents for a template given a instance. This is where a filesystem loader would read contents from the filesystem, or a database loader would read from the database. If a matching template doesn’t exist, this should raise a error.

Get_template( template_name, skip=None) Returns a Template object for a given template_name by looping through results from and calling. This returns the first matching template. If no template is found, is raised.

The optional skip argument is a list of origins to ignore when extending templates. This allow templates to extend other templates of the same name. It also used to avoid recursion errors. In general, it is enough to define and for custom template loaders. Get_template() will usually not need to be overridden.

Template origin Templates have an origin containing attributes depending on the source they are loaded from. Class Origin( name, template_name=None, loader=None) name The path to the template as returned by the template loader. For loaders that read from the file system, this is the full path to the template. If the template is instantiated directly rather than through a template loader, this is a string value of.

Template_name The relative path to the template as passed into the template loader. If the template is instantiated directly rather than through a template loader, this is None. Loader The template loader instance that constructed this Origin. If the template is instantiated directly rather than through a template loader, this is None.

Requires all of its wrapped loaders to set this attribute, typically by instantiating the Origin with loader=self. • Contents • • • • • • • • • • • • • • • • • • • • • • • • • • • • Browse • Prev: • Next: • • • You are here: • • • • The Django template language: for Python programmers Getting help Try the FAQ — it's got answers to many common questions.,, or Handy when looking for specific information. Search for information in the archives of the django-users mailing list, or post a question.

Ask a question in the #django IRC channel, or search the IRC logs to see if it’s been asked before. Report bugs with Django or Django documentation in our ticket tracker. Download: Offline (Django 2.0): Provided.