Gabor Urban
3/1/2010 2:05:00 PM
Hi guys,
I am building a nested data structure with the following compontens:
<>
class Item:
def __init__(self, pId, pChange, pComment):
self.ID = pId
self.Delta = pChange
self.Comment = pComment
def PrintItem(self):
str = '%s,%s,%s'%(self.ID,self.Delta,self.comment)
return str
class Package:
def __init__(self, pSerial, pDate, pOwner, pSchema):
self.serial = pSerial
self.date = pDate
self.owner = pOwner
self.schema = pSchema
self.items = []
def insertItem(self, pItem):
self.items.append(pItem)
def printPackage(self):
lines = []
str = '%s,%s,%s,%s'%(self.serial,self.date,self.owner,self.schema)
number = self.items.length
for idx in xrange(number):
line = ''
istr = self.items[idx].PrintItem()
line = str + ',' + istr
lines.append(line)
return lines
<>
The above structure is processed with next code:
<>
size = len(packages)
package = None
for index in xrange(size):
logger.info('PrettyPrinting package id=%d',index)
oplines = []
oplines = packages[index].printPackage()
for i in xrange(oplines.length):
data.append(oplines[i])
<>
I've got the next error message:
' Traceback (most recent call last):
File "XmlHistory_orig.py", line 203, in ?
oplines = packages[index].printPackage()
TypeError: unbound method printPackage() must be called with Package
instance as first argument (got nothing instead) '
I did give a try to access the fields directly
<>
packages = []
data = []
size = len(packages)
for index in xrange(size):
str = '%s,%s,%s,%s'%(packages[index].serial,packages[index].date,packages[index].owner,packages[index].schema)
itemnum = len(packages[index].items)
oplines = []
for itemIndx in xrange(itemnum):
element =
'%s,%s,%s'%(packages[index].items[itemIdx].ID,packages[index].items[itemIdx].Delta,packages[index].items[itemIdx].comment)
oplines.append(str + ','+elemt)
<>
Error:
Traceback (most recent call last):
File "XmlHistory.py", line 204, in ?
str = '%s,%s,%s,%s'%(packages[index].serial,packages[index].date,packages[index].owner,packages[index].schema)
AttributeError: class Package has no attribute 'serial'
The strange in this issue for me, that I do not see why are the class
methods and fields lost.
Any idea is wellcome.
Gabor
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