Re: #def woes

On Thu, May 21, 2009 at 03:52:08PM -0700, [email protected] wrote:
>    #def displayfloat($a)
>    $("%.2f"%$a)#slurp
>    #end def
>    #set showfloat = $getVar('displayfloat', autoCall=False)
> 
>    ## return a callable value for $name
>    #def callable($name)
>    #return $getVar($name, autoCall=False)
>    #end def
> 
>    #set showfloat =$callable('displayfloat')

Dude you're stomping on builtins, you probably shouldn't do that:

		>>> callable
		<built-in function callable>
		>>> 

The first example you've got works fine:

		>>> from Cheetah.Template import Template
		>> t = Template('''#def displayfloat(a)
		... $("%.2f"%$a)#slurp
		... #end def 
		... #set showfloat = $getVar('displayfloat', autoCall=False)
		... $showfloat(3.14)
		... ''')
		>>> t.respond()
		u'3.14\n'
		>>> 

I'm not sure what you're doing, it could be due to overriding the builtin 
callable() function which NameMapper *does* use for lookups (stupid
auto-calling), that's my only guess for why this is failing for you.

> 
>    both these options dont work
>        return str(compiled_tmpl)
>      File "/usr/lib/python2.5/site-packages/Cheetah/Template.py", line 997,
>    in __str__
>        return getattr(self, mainMethName)()
>      File "<string>", line 3514, in respond
>    NotFound: cannot find 'showfloat' while searching for 'showfloat'
> 
>    On Thu, May 21, 2009 at 2:57 PM, R. Tyler Ballance <[email protected]>
>    wrote:
> 
>      On Thu, May 21, 2009 at 02:55:50PM -0700, [email protected]
>      wrote:
>      >    #set $faa = self.foo
>      >
>      >    This is cool calling with self. doesnt autocall
> 
>      It doesn't call because you're in the right hand operand (where you need
>      not use Cheetah syntax), and you're not using the '$'. When you use the
>      $,
>      that invokes the NameMapper which is responsible for autocalling.
> 
>      I personally prefer this option to $getVar() which feels distinctly
>      non-Pythonic ;)
> 
>      >    On 5/20/09, Michael Higgins <[email protected]> wrote:
>      >
>      >      On May 20, 2009, at 4:18 PM, R. Tyler Ballance wrote:
>      >
>      >        I /think/ this should work:
>      >               #set $faa = foo
>      >
>      >      I'm not running the latest and greatest, but that doesn't work
>      for me.
>      >       What *does* work for me is saying
>      >
>      >      #set $faa = self.foo
>      >
>      >      Exploiting self in such an unvarnished way seems like it might be
>      too
>      >      close to relying on an implementation detail, but maybe it's
>      okay.  I
>      >      guess Cheetah already has to guarantee not to do name-mangling or
>      >      something so that Python code can call Cheetah methods
>      properly...
>      >
>      >        Alternatively, you can use:
>      >               #set $faa = $foo
>      >
>      >        If you compile the templates with autocalling disabled
>      >
>      >      Personally, I'm not a huge fan of tweaking the compile settings a
>      lot
>      >      for different templates.  It's just one more thing that can
>      mysteriously
>      >      break and take a long time to figure out.
>      >
>      >      To answer mobiledreamer's (later) question about what a wrapper
>      function
>      >      would look like:
>      >
>      >      ## return a callable value for $name
>      >      #def F($name)
>      >      #return $getVar($name, autoCall=False)
>      >      #end def
>      >
>      >      #set $faa = $F('foo')
>      >
>      >      ... assuming the self trick isn't the preferable style.  (It's
>      certainly
>      >      shorter!)
>      >
>      >      Mike
>      >
>      >    --
>      >    Bidegg worlds best auction site
>      >    http://bidegg.com
> 
>      --
>      -R. Tyler Ballance
>      Slide, Inc.
> 
>    --
>    Bidegg worlds best auction site
>    http://bidegg.com

-- 
-R. Tyler Ballance
Slide, Inc.

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