B |/\'@sdZddlmZddlmZddlmZyeWne k rHe ZYnXye Wne k rje Z YnXGddde Z e ZdS)z9 The ``E`` Element factory for generating XML documents. )absolute_importN)partialc@s*eZdZdZd ddZddZddZdS) ElementMakerac Element generator factory. Unlike the ordinary Element factory, the E factory allows you to pass in more than just a tag and some optional attributes; you can also pass in text and other elements. The text is added as either text or tail attributes, and elements are inserted at the right spot. Some small examples:: >>> from lxml import etree as ET >>> from lxml.builder import E >>> ET.tostring(E("tag")) '' >>> ET.tostring(E("tag", "text")) 'text' >>> ET.tostring(E("tag", "text", key="value")) 'text' >>> ET.tostring(E("tag", E("subtag", "text"), "tail")) 'texttail' For simple tags, the factory also allows you to write ``E.tag(...)`` instead of ``E('tag', ...)``:: >>> ET.tostring(E.tag()) '' >>> ET.tostring(E.tag("text")) 'text' >>> ET.tostring(E.tag(E.subtag("text"), "tail")) 'texttail' Here's a somewhat larger example; this shows how to generate HTML documents, using a mix of prepared factory functions for inline elements, nested ``E.tag`` calls, and embedded XHTML fragments:: # some common inline elements A = E.a I = E.i B = E.b def CLASS(v): # helper function, 'class' is a reserved word return {'class': v} page = ( E.html( E.head( E.title("This is a sample document") ), E.body( E.h1("Hello!", CLASS("title")), E.p("This is a paragraph with ", B("bold"), " text in it!"), E.p("This is another paragraph, with a ", A("link", href="http://www.python.org"), "."), E.p("Here are some reserved characters: ."), ET.XML("

And finally, here is an embedded XHTML fragment.

"), ) ) ) print ET.tostring(page) Here's a prettyprinted version of the output from the above script:: This is a sample document

Hello!

This is a paragraph with bold text in it!

This is another paragraph, with link.

Here are some reserved characters: <spam&egg>.

And finally, here is an embedded XHTML fragment.

For namespace support, you can pass a namespace map (``nsmap``) and/or a specific target ``namespace`` to the ElementMaker class:: >>> E = ElementMaker(namespace="http://my.ns/") >>> print(ET.tostring( E.test )) >>> E = ElementMaker(namespace="http://my.ns/", nsmap={'p':'http://my.ns/'}) >>> print(ET.tostring( E.test )) Ncs|dk rd|d|_nd|_|r.t||_nd|_|dk rPt|sHt||_ntj|_rftnidd}dd}tkr|t<t kr|t <tj kr|tj <fdd}tkr|t<|_ dS) N{}cSsFy|djpd||d_Wn$tk r@|jp4d||_YnXdS)N)tail IndexErrortext)elemitemr+lib/python3.7/site-packages/lxml/builder.pyadd_textsz'ElementMaker.__init__..add_textcSs|jrtd|j||_dS)Nz.add_cdatacsJ|j}x>|D]2\}}t|tr,|||<qt|d|||<qWdS)N)attribitems isinstance basestringtype)r r rkv)typemaprradd_dicts   z'ElementMaker.__init__..add_dict) _namespacedict_nsmapcallableAssertionError _makeelementETZElementstrunicodeZCDATA_typemap)selfr namespacensmapZ makeelementrrrr)rr__init__s2      zElementMaker.__init__c Os|j}|jdk r&|ddkr&|j|}|j||jd}|rH|t||x|D]}t|r`|}|t|}|dkrt |r| |qNx(s     5