twisted.web.template module documentationtwisted.web
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      HTML rendering for twisted.web.
| Variable | VALID_HTML_TAG_NAMES | A list of recognized HTML tag names, used by the tag object. | 
  
| Variable | TEMPLATE_NAMESPACE | The XML namespace used to identify attributes and elements used by the templating system, which should be removed from the final output document. | 
| Variable | tags | A convenience object which can produce Tag objects on demand via attribute access.  For example: tags.div is equivalent to Tag("div"). Tags not specified in VALID_HTML_TAG_NAMES will result in an AttributeError. | 
  
| Variable | __all__ | Undocumented | 
| Class | Tag | No summary | 
| Class | slot | Marker for markup insertion in a template. | 
| Class | Comment | A <!-- --> comment from a template.  Given a separate representation in the DOM so that they may be round-tripped through rendering without losing information. | 
  
| Class | CDATA | A <![CDATA[]]> block from a template.  Given a separate representation in the DOM so that they may be round-tripped through rendering without losing information. | 
  
| Class | CharRef | A numeric character reference. Given a separate representation in the DOM so that non-ASCII characters may be output as pure ASCII. | 
| Variable | NOT_DONE_YET | Undocumented | 
| Class | TagLoader | An ITemplateLoader that loads existing IRenderable providers. | 
  
| Class | XMLString | An ITemplateLoader that loads and parses XML from a string. | 
  
| Class | XMLFile | An ITemplateLoader that loads and parses XML from a file. | 
  
| Function | renderElement | Render an element or other IRenderable. | 
  
| Class | Element | Base for classes which can render part of a page. | 
| Function | renderer | Decorate with renderer to use methods as template render directives. | 
  
| Function | flatten | Incrementally write out a string representation of root using write. | 
  
| Function | flattenString | Collate a string representation of root into a single string. | 
  
| Variable | _moduleLog | Undocumented | 
| Class | _NSContext | A mapping from XML namespaces onto their prefixes in the document. | 
| Class | _ToStan | A SAX parser which converts an XML document to the Twisted STAN Document Object Model. | 
| Function | _flatsaxParse | Perform a SAX parse of an XML document with the _ToStan class. | 
| Class | _TagFactory | A factory for Tag objects; the implementation of the tags object. | 
  
str)
  Tag objects on demand via attribute access.  For example: tags.div is equivalent to Tag("div"). Tags not specified in VALID_HTML_TAG_NAMES will result in an AttributeError.Perform a SAX parse of an XML document with the _ToStan class.
| Parameters | fl | The XML document to be parsed. (type: A file object or filename.) | 
| Returns | a list of Stan objects. | |
Render an element or other IRenderable.
| Parameters | request | The Request being rendered to. | 
| element | An IRenderable which will be rendered. | |
| doctype | A bytes which will be written as the first line of the request, or None to disable writing of a doctype.  The string should not include a trailing newline and will default to the HTML5 doctype '<!DOCTYPE html>'. | |
| Returns | NOT_DONE_YET | |
| Present Since | 12.1 | |
Decorate with renderer to use methods as template render directives.
For example:
    class Foo(Element):
        @renderer
        def twiddle(self, request, tag):
            return tag('Hello, world.')
    <div xmlns:t="http://twistedmatrix.com/ns/twisted.web.template/0.1">
        <span t:render="twiddle" />
    </div>
Will result in this final output:
    <div>
        <span>Hello, world.</span>
    </div>
Incrementally write out a string representation of root using write.
In order to create a string representation, root will be decomposed into simpler objects which will themselves be decomposed and so on until strings or objects which can easily be converted to strings are encountered.
| Parameters | request | A request object which will be passed to the render method of any IRenderable provider which is encountered. | 
| root | An object to be made flatter.  This may be of type unicode, bytes, slot, Tag, tuple, list, types.GeneratorType, Deferred, or something that provides IRenderable. | |
| write | A callable which will be invoked with each bytes produced by flattening root. | |
| Returns | A Deferred which will be called back when root has been completely flattened into write or which will be errbacked if an unexpected exception occurs. | |
Collate a string representation of root into a single string.
This is basically gluing flatten to an io.BytesIO and returning the results. See flatten for the exact meanings of request and root.
| Returns | A Deferred which will be called back with a single string as its result when root has been completely flattened into write or which will be errbacked if an unexpected exception occurs. | |