- •Front Matter
- •Copyright, Trademarks, and Attributions
- •Attributions
- •Print Production
- •Contacting The Publisher
- •HTML Version and Source Code
- •Typographical Conventions
- •Author Introduction
- •Audience
- •Book Content
- •The Genesis of repoze.bfg
- •The Genesis of Pyramid
- •Thanks
- •Pyramid Introduction
- •What Makes Pyramid Unique
- •URL generation
- •Debug Toolbar
- •Debugging settings
- •Class-based and function-based views
- •Extensible templating
- •Rendered views can return dictionaries
- •Event system
- •Built-in internationalization
- •HTTP caching
- •Sessions
- •Speed
- •Exception views
- •No singletons
- •View predicates and many views per route
- •Transaction management
- •Flexible authentication and authorization
- •Traversal
- •Tweens
- •View response adapters
- •Testing
- •Support
- •Documentation
- •What Is The Pylons Project?
- •Pyramid and Other Web Frameworks
- •Installing Pyramid
- •Before You Install
- •Installing Pyramid on a UNIX System
- •Installing the virtualenv Package
- •Creating the Virtual Python Environment
- •Installing Pyramid Into the Virtual Python Environment
- •Installing Pyramid on a Windows System
- •What Gets Installed
- •Application Configuration
- •Summary
- •Creating Your First Pyramid Application
- •Hello World
- •Imports
- •View Callable Declarations
- •WSGI Application Creation
- •WSGI Application Serving
- •Conclusion
- •References
- •Creating a Pyramid Project
- •Scaffolds Included with Pyramid
- •Creating the Project
- •Installing your Newly Created Project for Development
- •Running The Tests For Your Application
- •Running The Project Application
- •Reloading Code
- •Viewing the Application
- •The Debug Toolbar
- •The Project Structure
- •The MyProject Project
- •development.ini
- •production.ini
- •MANIFEST.in
- •setup.py
- •setup.cfg
- •The myproject Package
- •__init__.py
- •views.py
- •static
- •templates/mytemplate.pt
- •tests.py
- •Modifying Package Structure
- •Using the Interactive Shell
- •What Is This pserve Thing
- •Using an Alternate WSGI Server
- •Startup
- •The Startup Process
- •Deployment Settings
- •Request Processing
- •URL Dispatch
- •High-Level Operational Overview
- •Route Pattern Syntax
- •Route Declaration Ordering
- •Route Matching
- •The Matchdict
- •The Matched Route
- •Routing Examples
- •Example 1
- •Example 2
- •Example 3
- •Matching the Root URL
- •Generating Route URLs
- •Static Routes
- •Debugging Route Matching
- •Using a Route Prefix to Compose Applications
- •Custom Route Predicates
- •Route Factories
- •Using Pyramid Security With URL Dispatch
- •Route View Callable Registration and Lookup Details
- •References
- •Views
- •View Callables
- •View Callable Responses
- •Using Special Exceptions In View Callables
- •HTTP Exceptions
- •How Pyramid Uses HTTP Exceptions
- •Custom Exception Views
- •Using a View Callable to Do an HTTP Redirect
- •Handling Form Submissions in View Callables (Unicode and Character Set Issues)
- •Alternate View Callable Argument/Calling Conventions
- •Renderers
- •Writing View Callables Which Use a Renderer
- •Built-In Renderers
- •string: String Renderer
- •json: JSON Renderer
- •JSONP Renderer
- •*.pt or *.txt: Chameleon Template Renderers
- •*.mak or *.mako: Mako Template Renderer
- •Varying Attributes of Rendered Responses
- •Deprecated Mechanism to Vary Attributes of Rendered Responses
- •Adding and Changing Renderers
- •Adding a New Renderer
- •Changing an Existing Renderer
- •Overriding A Renderer At Runtime
- •Templates
- •Using Templates Directly
- •System Values Used During Rendering
- •Chameleon ZPT Templates
- •A Sample ZPT Template
- •Using ZPT Macros in Pyramid
- •Templating with Chameleon Text Templates
- •Side Effects of Rendering a Chameleon Template
- •Debugging Templates
- •Chameleon Template Internationalization
- •Templating With Mako Templates
- •A Sample Mako Template
- •Automatically Reloading Templates
- •Available Add-On Template System Bindings
- •View Configuration
- •Mapping a Resource or URL Pattern to a View Callable
- •@view_defaults Class Decorator
- •NotFound Errors
- •Debugging View Configuration
- •Static Assets
- •Serving Static Assets
- •Generating Static Asset URLs
- •Advanced: Serving Static Assets Using a View Callable
- •Root-Relative Custom Static View (URL Dispatch Only)
- •Overriding Assets
- •The override_asset API
- •Request and Response Objects
- •Request
- •Special Attributes Added to the Request by Pyramid
- •URLs
- •Methods
- •Unicode
- •Multidict
- •Dealing With A JSON-Encoded Request Body
- •Cleaning Up After a Request
- •More Details
- •Response
- •Headers
- •Instantiating the Response
- •Exception Responses
- •More Details
- •Sessions
- •Using The Default Session Factory
- •Using a Session Object
- •Using Alternate Session Factories
- •Creating Your Own Session Factory
- •Flash Messages
- •Using the session.flash Method
- •Using the session.pop_flash Method
- •Using the session.peek_flash Method
- •Preventing Cross-Site Request Forgery Attacks
- •Using the session.get_csrf_token Method
- •Using the session.new_csrf_token Method
- •Using Events
- •An Example
- •Reloading Templates
- •Reloading Assets
- •Debugging Authorization
- •Debugging Not Found Errors
- •Debugging Route Matching
- •Preventing HTTP Caching
- •Debugging All
- •Reloading All
- •Default Locale Name
- •Including Packages
- •pyramid.includes vs. pyramid.config.Configurator.include()
- •Mako Template Render Settings
- •Mako Directories
- •Mako Module Directory
- •Mako Input Encoding
- •Mako Error Handler
- •Mako Default Filters
- •Mako Import
- •Mako Preprocessor
- •Examples
- •Understanding the Distinction Between reload_templates and reload_assets
- •Adding A Custom Setting
- •Logging
- •Sending Logging Messages
- •Filtering log messages
- •Logging Exceptions
- •PasteDeploy Configuration Files
- •PasteDeploy
- •Entry Points and PasteDeploy .ini Files
- •[DEFAULTS] Section of a PasteDeploy .ini File
- •Command-Line Pyramid
- •Displaying Matching Views for a Given URL
- •The Interactive Shell
- •Extending the Shell
- •IPython or bpython
- •Displaying All Application Routes
- •Invoking a Request
- •Writing a Script
- •Changing the Request
- •Cleanup
- •Setting Up Logging
- •Making Your Script into a Console Script
- •Internationalization and Localization
- •Creating a Translation String
- •Using The TranslationString Class
- •Using the TranslationStringFactory Class
- •Working With gettext Translation Files
- •Installing Babel and Lingua
- •Extracting Messages from Code and Templates
- •Initializing a Message Catalog File
- •Updating a Catalog File
- •Compiling a Message Catalog File
- •Using a Localizer
- •Performing a Translation
- •Performing a Pluralization
- •Obtaining the Locale Name for a Request
- •Performing Date Formatting and Currency Formatting
- •Chameleon Template Support for Translation Strings
- •Mako Pyramid I18N Support
- •Localization-Related Deployment Settings
- •Activating Translation
- •Adding a Translation Directory
- •Setting the Locale
- •Locale Negotiators
- •The Default Locale Negotiator
- •Using a Custom Locale Negotiator
- •Virtual Hosting
- •Virtual Root Support
- •Further Documentation and Examples
- •Test Set Up and Tear Down
- •What?
- •Using the Configurator and pyramid.testing APIs in Unit Tests
- •Creating Integration Tests
- •Creating Functional Tests
- •Resources
- •Location-Aware Resources
- •Generating The URL Of A Resource
- •Overriding Resource URL Generation
- •Generating the Path To a Resource
- •Finding a Resource by Path
- •Obtaining the Lineage of a Resource
- •Determining if a Resource is In The Lineage of Another Resource
- •Finding the Root Resource
- •Resources Which Implement Interfaces
- •Finding a Resource With a Class or Interface in Lineage
- •Pyramid API Functions That Act Against Resources
- •Much Ado About Traversal
- •URL Dispatch
- •Historical Refresher
- •Traversal (aka Resource Location)
- •View Lookup
- •Use Cases
- •Traversal
- •Traversal Details
- •The Resource Tree
- •The Traversal Algorithm
- •A Description of The Traversal Algorithm
- •Traversal Algorithm Examples
- •References
- •Security
- •Enabling an Authorization Policy
- •Enabling an Authorization Policy Imperatively
- •Protecting Views with Permissions
- •Setting a Default Permission
- •Assigning ACLs to your Resource Objects
- •Elements of an ACL
- •Special Principal Names
- •Special Permissions
- •Special ACEs
- •ACL Inheritance and Location-Awareness
- •Changing the Forbidden View
- •Debugging View Authorization Failures
- •Debugging Imperative Authorization Failures
- •Creating Your Own Authentication Policy
- •Creating Your Own Authorization Policy
- •Combining Traversal and URL Dispatch
- •A Review of Non-Hybrid Applications
- •URL Dispatch Only
- •Traversal Only
- •Hybrid Applications
- •The Root Object for a Route Match
- •Using *traverse In a Route Pattern
- •Using *subpath in a Route Pattern
- •Corner Cases
- •Registering a Default View for a Route That Has a view Attribute
- •Using Hooks
- •Changing the Not Found View
- •Changing the Forbidden View
- •Changing the Request Factory
- •Using The Before Render Event
- •Adding Renderer Globals (Deprecated)
- •Using Response Callbacks
- •Using Finished Callbacks
- •Changing the Traverser
- •Changing How pyramid.request.Request.resource_url() Generates a URL
- •Changing How Pyramid Treats View Responses
- •Using a View Mapper
- •Creating a Tween Factory
- •Registering an Implicit Tween Factory
- •Suggesting Implicit Tween Ordering
- •Explicit Tween Ordering
- •Displaying Tween Ordering
- •Pyramid Configuration Introspection
- •Using the Introspector
- •Introspectable Objects
- •Pyramid Introspection Categories
- •Introspection in the Toolbar
- •Disabling Introspection
- •Rules for Building An Extensible Application
- •Fundamental Plugpoints
- •Extending an Existing Application
- •Extending the Application
- •Overriding Views
- •Overriding Routes
- •Overriding Assets
- •Advanced Configuration
- •Two-Phase Configuration
- •Using config.action in a Directive
- •Adding Configuration Introspection
- •Introspectable Relationships
- •Thread Locals
- •Why and How Pyramid Uses Thread Local Variables
- •Using the Zope Component Architecture in Pyramid
- •Using the ZCA Global API in a Pyramid Application
- •Disusing the Global ZCA API
- •Enabling the ZCA Global API by Using hook_zca
- •Enabling the ZCA Global API by Using The ZCA Global Registry
- •Background
- •Design
- •Overall
- •Models
- •Views
- •Security
- •Summary
- •Installation
- •Preparation
- •Make a Project
- •Run the Tests
- •Expose Test Coverage Information
- •Start the Application
- •Visit the Application in a Browser
- •Decisions the zodb Scaffold Has Made For You
- •Basic Layout
- •Resources and Models with models.py
- •Views With views.py
- •Defining the Domain Model
- •Delete the Database
- •Edit models.py
- •Look at the Result of Our Edits to models.py
- •View the Application in a Browser
- •Defining Views
- •Declaring Dependencies in Our setup.py File
- •Adding View Functions
- •Viewing the Result of all Our Edits to views.py
- •Adding Templates
- •Viewing the Application in a Browser
- •Adding Authorization
- •Add Authentication and Authorization Policies
- •Add security.py
- •Give Our Root Resource an ACL
- •Add Login and Logout Views
- •Change Existing Views
- •Add permission Declarations to our view_config Decorators
- •Add the login.pt Template
- •Change view.pt and edit.pt
- •See Our Changes To views.py and our Templates
- •View the Application in a Browser
- •Adding Tests
- •Test the Models
- •Test the Views
- •Functional tests
- •View the results of all our edits to tests.py
- •Run the Tests
- •Distributing Your Application
- •SQLAlchemy + URL Dispatch Wiki Tutorial
- •Background
- •Design
- •Overall
- •Models
- •Views
- •Security
- •Summary
- •Installation
- •Preparation
- •Making a Project
- •Running the Tests
- •Exposing Test Coverage Information
- •Initializing the Database
- •Starting the Application
- •Decisions the alchemy Scaffold Has Made For You
- •Basic Layout
- •View Declarations via views.py
- •Content Models with models.py
- •Making Edits to models.py
- •Changing scripts/initializedb.py
- •Reinitializing the Database
- •Viewing the Application in a Browser
- •Defining Views
- •Declaring Dependencies in Our setup.py File
- •Running setup.py develop
- •Changing the views.py File
- •Adding Templates
- •Adding Routes to __init__.py
- •Viewing the Application in a Browser
- •Adding Authorization
- •Adding A Root Factory
- •Add an Authorization Policy and an Authentication Policy
- •Adding an authentication policy callback
- •Adding Login and Logout Views
- •Changing Existing Views
- •Adding the login.pt Template
- •Seeing Our Changes To views.py and our Templates
- •Viewing the Application in a Browser
- •Adding Tests
- •Testing the Models
- •Testing the Views
- •Functional tests
- •Viewing the results of all our edits to tests.py
- •Running the Tests
- •Distributing Your Application
- •Converting a repoze.bfg Application to Pyramid
- •Running a Pyramid Application under mod_wsgi
- •pyramid.authorization
- •pyramid.authentication
- •Authentication Policies
- •Helper Classes
- •pyramid.chameleon_text
- •pyramid.chameleon_zpt
- •pyramid.config
- •pyramid.events
- •Functions
- •Event Types
- •pyramid.exceptions
- •pyramid.httpexceptions
- •HTTP Exceptions
- •pyramid.i18n
- •pyramid.interfaces
- •Event-Related Interfaces
- •Other Interfaces
- •pyramid.location
- •pyramid.paster
- •pyramid.registry
- •pyramid.renderers
- •pyramid.request
- •pyramid.response
- •Functions
- •pyramid.scripting
- •pyramid.security
- •Authentication API Functions
- •Authorization API Functions
- •Constants
- •Return Values
- •pyramid.settings
- •pyramid.testing
- •pyramid.threadlocal
- •pyramid.traversal
- •pyramid.url
- •pyramid.view
- •pyramid.wsgi
- •Glossary
CHAPTER
FORTYEIGHT
PYRAMID.I18N
class TranslationString
The constructor for a translation string. A translation string is a Unicode-like object that has some extra metadata.
This constructor accepts one required argument named msgid. msgid must be the message identifier for the translation string. It must be a unicode object or a str object encoded in the default system encoding.
Optional keyword arguments to this object’s constructor include domain, default, and mapping.
domain represents the translation domain. By default, the translation domain is None, indicating that this translation string is associated with the default translation domain (usually messages).
default represents an explicit default text for this translation string. Default text appears when the translation string cannot be translated. Usually, the msgid of a translation string serves double duty as as its default text. However, using this option you can provide a different default text for this translation string. This feature is useful when the default of a translation string is too complicated or too long to be used as a message identifier. If default is provided, it must be a unicode object or a str object encoded in the default system encoding (usually means ASCII). If default is None (its default value), the msgid value used by this translation string will be assumed to be the value of default.
mapping, if supplied, must be a dictionary-like object which represents the replacement values for any translation string replacement marker instances found within the msgid (or default) value of this translation string.
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48. PYRAMID.I18N
After a translation string is constructed, it behaves like most other unicode objects; its msgid value will be displayed when it is treated like a unicode object. Only when its ugettext method is called will it be translated.
Its default value is available as the default attribute of the object, its translation domain is available as the domain attribute, and the mapping is available as the mapping attribute. The object otherwise behaves much like a Unicode string.
class TranslationStringFactory
Create a factory which will generate translation strings without requiring that each call to the factory be passed a domain value. A single argument is passed to this class’ constructor: domain. This value will be used as the domain values of translationstring.TranslationString objects generated by the __call__ of this class. The msgid, mapping, and default values provided to the __call__ method of an instance of this class have the meaning as described by the constructor of the translationstring.TranslationString
class Localizer(locale_name, |
translations) |
|
|
|
|
An object providing translation and pluralizations related to |
the |
current |
request’s |
||
locale name. |
A |
pyramid.i18n.Localizer |
object |
is created |
using the |
pyramid.i18n.get_localizer() function.
locale_name
The locale name for this localizer (e.g. en or en_US).
pluralize(singular, plural, n, domain=None, mapping=None)
Return a Unicode string translation by using two message identifier objects as a singular/plural pair and an n value representing the number that appears in the message using gettext plural forms support. The singular and plural objects passed may be translation strings or unicode strings. n represents the number of elements. domain is the translation domain to use to do the pluralization, and mapping is the interpolation mapping that should be used on the result. Note that if the objects passed are translation strings, their domains and mappings are ignored. The domain and mapping arguments must be used instead. If the domain is not supplied, a default domain is used (usually messages).
Example:
num = 1
translated = localizer.pluralize(’Add ${num} item’, ’Add ${num} items’, num, mapping={’num’:num})
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translate(tstring, domain=None, mapping=None)
Translate a translation string to the current language and interpolate any replacement markers in the result. The translate method accepts three arguments: tstring (required), domain (optional) and mapping (optional). When called, it will translate the tstring translation string to a unicode object using the current locale. If the current locale could not be determined, the result of interpolation of the default value is returned. The optional domain argument can be used to specify or override the domain of the tstring (useful when tstring is a normal string rather than a translation string). The optional mapping argument can specify or override the tstring interpolation mapping, useful when the tstring argument is a simple string instead of a translation string.
Example:
from pyramid.18n import TranslationString
ts = TranslationString(’Add ${item}’, domain=’mypackage’, mapping={’item’:’Item’})
translated = localizer.translate(ts)
Example:
translated = localizer.translate(’Add ${item}’, domain=’mypackage’, mapping={’item’:’Item’})
get_localizer(request)
Retrieve a pyramid.i18n.Localizer object corresponding to the current request’s locale name.
negotiate_locale_name(request)
Negotiate and return the locale name associated with the current request (never cached).
get_locale_name(request)
Return the locale name associated with the current request (possibly cached).
default_locale_negotiator(request)
The default locale negotiator. Returns a locale name or None.
•First, the negotiator looks for the _LOCALE_ attribute of the request object (possibly set by a view or a listener for an event).
•Then it looks for the request.params[’_LOCALE_’] value.
•Then it looks for the request.cookies[’_LOCALE_’] value.
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48. PYRAMID.I18N
•Finally, the negotiator returns None if the locale could not be determined via any of the previous checks (when a locale negotiator returns None, it signifies that the default locale name should be used.)
make_localizer(current_locale_name, translation_directories)
Create a pyramid.i18n.Localizer object corresponding to the provided locale name from the translations found in the list of translation directories.
See Internationalization and Localization for more information about using Pyramid internationalization and localization services within an application.
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