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POWhat can I do to get the return value from a %def?
 

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  1. POWhat can I do to get the return value from a %def?
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    <p>How do I get the return value from a %def?</p> <p>makoT1.py:</p> <pre><code>import mako from mako.template import Template from mako.lookup import TemplateLookup print "Hi world.", mytemplate = Template(filename='makoT1.mako') print mytemplate.render(), </code></pre> <p>makoT1.mako</p> <pre><code>&lt;% index = 0 %&gt; &lt;%def name="a_def(counter)"&gt; Pre: ${counter} &lt;% counter += 1 %&gt; Post: ${counter} &lt;% return counter %&gt; &lt;/%def&gt; index: ${index} ${a_def(index)} index: ${index} </code></pre> <p>dalem@QnD:~$ python makoT1.py</p> <pre><code>Hi world. index: 0 Pre: 0 Post: 1 1 index: 0 </code></pre> <p>Notice that the second "index," above is still 0? That's what I'm trying to fix. I'd like it to increment.</p> <p>Perhaps something like this for makoT1.mako:</p> <pre><code>&lt;% index = 0 %&gt; &lt;%def name="a_def(counter)"&gt; Pre: ${counter} &lt;% counter += 1 %&gt; Post: ${counter} &lt;% return counter %&gt; &lt;/%def&gt; index: ${index} &lt;% index = ${a_def(index)} %&gt; index: ${index} </code></pre> <p>But that gets me this error:</p> <pre><code>dalem@QnD:~$ python makoT1.py Hi world. Traceback (most recent call last): File "makoT1.py", line 5, in &lt;module&gt; mytemplate = Template(filename='makoT1.mako') File "/usr/local/lib/python2.7/dist-packages/mako/template.py", line 291, in __init__ module = self._compile_from_file(path, filename) File "/usr/local/lib/python2.7/dist-packages/mako/template.py", line 368, in _compile_from_file filename) File "/usr/local/lib/python2.7/dist-packages/mako/template.py", line 615, in _compile_text generate_magic_comment=template.disable_unicode) File "/usr/local/lib/python2.7/dist-packages/mako/template.py", line 597, in _compile node = lexer.parse() File "/usr/local/lib/python2.7/dist-packages/mako/lexer.py", line 241, in parse if self.match_python_block(): File "/usr/local/lib/python2.7/dist-packages/mako/lexer.py", line 376, in match_python_block match.group(1)=='!', lineno=line, pos=pos) File "/usr/local/lib/python2.7/dist-packages/mako/lexer.py", line 131, in append_node node = nodecls(*args, **kwargs) File "/usr/local/lib/python2.7/dist-packages/mako/parsetree.py", line 139, in __init__ self.code = ast.PythonCode(text, **self.exception_kwargs) File "/usr/local/lib/python2.7/dist-packages/mako/ast.py", line 37, in __init__ expr = pyparser.parse(code.lstrip(), "exec", **exception_kwargs) File "/usr/local/lib/python2.7/dist-packages/mako/pyparser.py", line 60, in parse ), **exception_kwargs) mako.exceptions.SyntaxException: (SyntaxError) invalid syntax (&lt;unknown&gt;, line 1) (u'index = ${a_def(index)} \n') in file 'makoT1.mako' at line: 11 char: 1 </code></pre> <p>It seems odd to me that line 11 would get the SyntaxError when this works fine for line 11:</p> <pre><code>&lt;% index = 0 %&gt; </code></pre> <p>Shouldn't ${a_def(index)} return the integer from a_def(counter)?</p>
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