It might make your life easier if you used a dtml-let (WARNING: untested): <dtml-in dictList="ScriptThatReturnsAListofDicts()"> <dtml-let aDict="_['sequence-item']"> <dtml-if "aDict.has_key('titled')"> do something here But this is still pretty ugly. Another approach would be to clean up the data in your list/dicts within the python script, before you get to the dtml method. Jonathan ----- Original Message ----- From: Alric Aneron To: zope@zope.org Sent: Monday, June 19, 2006 2:46 PM Subject: [Zope] dictionary from sequence-item Hello, I am looping through a list of dictionary objects using <dtml-in... and within the dtml-in body I have: <dtml-var "_.getitem('sequence-item')['titled']" missing="none"> Some of the dictionaries in the list don't have 'titled' key so it should replace it with the word "none", but it gives me an error Error Type: KeyError Error Value: 'titled' I don't understand. Another option is that I can use <dtml-if "_.getitem('sequence-item').has_key('titled')"> but it doesn't work, says has_key is an unknown attribute. This is the stupidest thing ever! it's a dictionary object! I try to typecast it using the dict(_.getitem('sequence-item')).has_key('titled') it gives me an error saying it can't typecast, but I am 100% sure it's a dictionary object because I can access it easily _.getitem('sequence-item')['titled'] for those that have that key. Any idea how I can check if the titled key is in the dictionary for the current list item? Thanks in advance guys! ------------------------------------------------------------------------------ Yahoo! Messenger with Voice. PC-to-Phone calls for ridiculously low rates. ------------------------------------------------------------------------------ _______________________________________________ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )

Alric Aneron wrote:

Hello, I am looping through a list of dictionary objects using <dtml-in... and within the dtml-in body I have: <dtml-var "_.getitem('sequence-item')['titled']" missing="none"> Some of the dictionaries in the list don't have 'titled' key so it should replace it with the word "none", but it gives me an error *Error Type: KeyError* *Error Value: 'titled' * I don't understand. Another option is that I can use <dtml-if "_.getitem('sequence-item').has_key('titled')"> but it doesn't work, says has_key is an unknown attribute. This is the stupidest thing ever! it's a dictionary object! I try to typecast it using the dict(_.getitem('sequence-item')).has_key('titled') it gives me an error saying it can't typecast, but I am 100% sure it's a dictionary object because I can access it easily _.getitem('sequence-item')['titled'] for those that have that key.

Any idea how I can check if the titled key is in the dictionary for the current list item?

Thanks in advance guys!

------------------------------------------------------------------------

Alric, Your earlier post indicated that your DTML obtains the sequence of dictionaries from a python script - and *then* tries to filter it and process it. Why not do your filtering, e.g. appending only thoses values that have a key == 'key1' in your python script first? Thats why "god" invented python scripts :-) . And as Jonathan indicated, you should also simplify the list returned. I would just return a list of filtered values, e.g. # ----------------------------------------------- # python script (based on your earlier message) # ----------------------------------------------- # DTML call to this script can pass these as parameters or obtain them from the request ... mydict = {'key1': 'value1', 'key2': 'value2'} mydict2 = {'key1': 'value3', 'key2': 'value4'} desired_key = 'key1' #results bucket finalList = [] for dict in (mydict,mydict2): # we avoid returning list of dictionaries which can be awkward in DTML for k in dict.keys(): if k == desired_key: # <------- filter it here so DTML doesn't have to finalList.append( dict[ k ] ) return finalList Now your DTML is simple. David