Paolo Pantaleo wrote:
> 2006/8/2, Stephan Diehl <[EMAIL PROTECTED]>:
>> Paolo Pantaleo wrote:
>> > [I hope I am posting to the right place]
>> >
>> > I have a cheetah template something like this:
>> >
>> > x is: $x
>> > y is: $y
>> > z is: $z
>> >
>> > [Actually more complicated]
>> >
>> > If for example $y is not defined I get an exception and the parsing
>> > of the template stops. Is there any way to substitute $y with an emty
>> > string and making cheeta going on with parsing?
>> >
>> > Thnx
>> > PAolo
>> >
>>
>>
http://cheetahtemplate.org/docs/users_guide_html_multipage/language.namemapper.missing.html
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>
>
> Actually I wanted to keep things simple for who writes the template,
> so I am using this workaround: I define a class
>
> class ClassMapper:
> def __init__(self,dict={}):
> self.__dict=dict
> def getValue(self,str):
> try:
> return self.__dict[str]
> except KeyError:
> return ""
>
> x=ClassMapper(dict)
> Template(definition, searchList=[{"info":x.getValue}])
>
>
>
> so the user should do
>
> $info("name")
>
> Maybe I could define a class that implements a dictionary and doesn''t
> raise an exception for a key not present... but it seems to
> complicated.
You mean something like
from Cheetah.Template import Template
class Dict(dict):
def __getitem__(self, key):
return self.get(key, "")
template = """\
x is $x
y is $y
z is $z
"""
print Template(template, searchList=[Dict(x="x", y="y")])
You can also make a debugging version:
class Dict(dict):
def __getitem__(self, key):
return self.get(key, "#missing key: %r#" % key)
Peter
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