PythonistL wrote:
> In my program I use something like this:
>
> #########
> ....
> ...
>
> for Field in manipulator.fields:
s/F/f/
it's an instance, not a class (Python's convention is to use CamelCase
for classes and all_lowers for instances).
> #do something
> print Field
> .....
> ......
> #########
> print Field there
> can print the correct value that is e.g.
> <input type="text" id="id_Pieces_4" class="vIntegerField"
> name="Pieces_4" size="4" value="" maxlength="4" />
>
> but because Field is an instance I can not use that in
> further processing e.g.
> string.replace(Field ,'id=','disabled id=')
<OT>
use 'disabled="disabled"' (xhtml compatibility)
</OT>
And : this is not "because field is an instance", this is "because field
is not a string" (hint: *everything* in Python is an instance).
> Is there any solution to my problem that is how to replace any text in
> the Field?
s/'text in the field'/'string generated by the field's __str__() method'/
<disclaimer>
Sorry if I look overly pedantic, but correct naming is the prerequisite
to correct understanding.
</disclaimer>
Depends on what you're trying to achieve. If you want to get the text
generated by the field's __str__() method, modify this text, then use
it, you can do something like:
tags = []
for field in manipulator.fields:
tags.append(str(field).replace('id=', 'disabled="disabled" id=')
But this won't impact the field object itself, so further calls to
field.__str__ will be as usual.
Another solution would be to subclass Fields classes and write your own
manipulators, but this would require a lot of (boring) work.
Yet another solution solution (and a far better one IMHO) is to take
advantage of Python's delegation mechanisms and use the decorator
pattern (nb : not tested):
class DisabledField(object):
def __init__(self, field):
self._field = field
def __str__(self):
return str(self._field).replace('id=', 'disabled="disabled" id=')
def __getattr__(self, name):
return getattr(self._field, name)
for id, field in enumerate(manipulator.fields):
manipulator.fields[id] = DisabledField(field)
Then you can use your manipulator as usual.
My 2 cents...
--
bruno desthuilliers
développeur
[EMAIL PROTECTED]
http://www.modulix.com
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