Re: [Zope-dev] Adding functions to _

[Evan Simpson]

From: Itamar Shtull-Trauring <[EMAIL PROTECTED]>
> However, when I call the function, I get an error about DocumentTemplate,
> from which I discovered that when I call _.logvis('a_string'), instead of
> the string being passed as the first parameter, _ is passed as the first
> parameter to my function, forcing me to truncate it when calling log2vis:

> Any idea what could cause this strange behaviour?  it doesn't happen for
> other functions inserted into _ in DT_Util.py.

When you stuff a function into "d", you're adding it to the class dictionary of 
DocumentTemplate, so
it effectively becomes a method of that class.  The first argument gets treated as 
"self", just like
in any other class method.

All of the functions in DT_Util are either builtins (which never get turned into bound 
methods) or
functions with a leading "self" parameter.

Cheers,

Evan @ digicool & 4-am


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[Zope-dev] Adding functions to _

[Itamar Shtull-Trauring]

I'm using CVS Zope, and I want to add a function of mine to _, so I have the
following code in a Product's __init__.py:

from log2vis import log2vis
from DocumentTemplate.DT_Util import d
d["log2vis"] = log2vis

However, when I call the function, I get an error about DocumentTemplate,
from which I discovered that when I call _.logvis('a_string'), instead of
the string being passed as the first parameter, _ is passed as the first
parameter to my function, forcing me to truncate it when calling log2vis:

from log2vis import log2vis
from DocumentTemplate.DT_Util import d

def log2vis_wrapper(*args, **kwargs):
return apply(log2vis, args[1:], kwargs)

d["log2vis"] = log2vis_wrapper


Any idea what could cause this strange behaviour?  it doesn't happen for
other functions inserted into _ in DT_Util.py.

-- 
Itamar S.T.  [EMAIL PROTECTED]
Fingerprint = D365 7BE8 B81E 2B18 6534  025E D0E7 92DB E441 411C

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