detox – Detox templates

This module is an XIST namespace. It provides a simple template language based on processing instructions embedded in XML or plain text.

The following example is a simple “Hello, World” type template:

from ll.xist.ns import detox

template = """
<?def helloworld(n=10)?>
   <?for i in range(n)?>
      Hello, World!
   <?end for?>
<?end def?>
"""

module = detox.xml2mod(template)

print "".join(module.helloworld())

class ll.xist.ns.detox.expr(*content)

Bases: ll.xist.xsc.ProcInst

Embed the value of the expression

class ll.xist.ns.detox.code(*content)

Bases: ll.xist.xsc.ProcInst

Embed the PI data literally in the generated code.

For example <?code foo = 42?> will put the statement foo = 42 into the generated Python source.

class ll.xist.ns.detox.if_(*content)

Bases: ll.xist.xsc.ProcInst

Starts an if block. An if block can contain zero or more elif_ blocks, followed by zero or one else_ block and must be closed with an endif PI.

For example:

<?code import random?>
<?code n = random.choice("123?")?>
<?if n == "1"?>
   One
<?elif n == "2"?>
   Two
<?elif n == "3"?>
   Three
<?else?>
   Something else
<?end if?>

class ll.xist.ns.detox.elif_(*content)

Bases: ll.xist.xsc.ProcInst

Starts an elif block.

class ll.xist.ns.detox.else_(*content)

Bases: ll.xist.xsc.ProcInst

Starts an else block.

class ll.xist.ns.detox.def_(*content)

Bases: ll.xist.xsc.ProcInst

Start a function (or method) definition. A function definition must be closed with an end PI.

Example:

<?def persontable(persons)?>
   <table>
      <tr>
         <th>first name</th>
         <th>last name</th>
      </tr>
      <?for person in persons?>
         <tr>
            <td><?textexpr person.firstname?></td>
            <td><?textexpr person.lastname?></td>
         </tr>
      <?end for?>
   </table>
<?end def?>

If the generated function contains output (i.e. if there is text content or expr, textexpr or attrexpr PIs before the matching end) the generated function will be a generator function.

Output outside of a function definition will be ignored.

class ll.xist.ns.detox.class_(*content)

Bases: ll.xist.xsc.ProcInst

Start a class definition. A class definition must be closed with an end PI.

Example:

<?class mylist(list)?>
   <?def output(self)?>
      <ul>
         <?for item in self?>
            <li><?textexpr item?></li>
         <?endfor?>
      </ul>
   <?end def?>
<?end class?>

class ll.xist.ns.detox.for_(*content)

Bases: ll.xist.xsc.ProcInst

Start a for loop. A for loop must be closed with an end PI.

For example:

<ul>
   <?for i in range(10)?>
      <li><?expr str(i)?></li>
   <?end for?>
</ul>

class ll.xist.ns.detox.while_(*content)

Bases: ll.xist.xsc.ProcInst

Start a while loop. A while loop must be closed with an end PI.

For example:

<?code i = 0?>
<ul>
   <?while True?>
      <li><?expr str(i)?><?code i += 1?></li>
      <?code if i > 10: break?>
   <?end while?>
</ul>

class ll.xist.ns.detox.end(*content)

Bases: ll.xist.xsc.ProcInst

Ends a while_ or for loop or a if_, def_ or class_ block.