[Zope] exec?? issue

[Chris Withers]

Greg Conway wrote:


> Counter=0
> for GetDoc in context.DisplayCustomerSQL(SelectCID=TestCID):
>   print "Customer name is %s %s" % (GetDoc.FirstName, GetDoc.LastName)
>   for FieldCount in FieldName:
>     ExecField = "GetDoc."+FieldName[Counter]
>     print "value of field %s is %s" % (FieldCount, ExecField)
>     Counter=Counter+1
> 
> (yes I realise there are probably tidier ways to do this - especially the
> counter bit! - but hey I am learning!! albeit bad habits.... :)

What's FieldName?

> So, by the time the script above gets to the second-from-last line, the var
> ExecField contains something like GetDoc.Field1 or GetDoc.Field2.
> 
> As you've probably guessed by now, I want to display the literal value of
> ExecField, instead than the word "ExecField" at this stage.... I'm not
> python programmer, but having scanned my copy of "learing Python"
> thoroughly, I reckon I'd use the "exec" command to do this.

I don't. exec is bad, never use exec. Can you spell 'security hole'? ;-)

> So, does anybody have any idea how I might solve my dilemma...??

you're specifically looking for:

getattr(object,variable_containing_attribute_name)

Here's a neater version of your code:

for GetDoc in context.DisplayCustomerSQL(SelectCID=TestCID):
    print "Customer name is %s %s" % (GetDoc.FirstName, GetDoc.LastName)
    for name in FieldName:
      print "value of field %s is %s" % (name, getattr(GetDoc,name))

> (which, by the way, I've arrived at by giving up on trying to Mail Merge
> Zope with Word,

What were the problems there?

cheers,

Chris