Environment:
Windows XP
Dell Dimension 4400 128RAM, 40gigHD
Python 2.1.1, build 212 (ActiveState)
My background - primarily Perl
I created a class to handle base data points that are parsed from a series
of "screen scrapings" or screen print images. The pertinent part is:
>>>>>>>>>>>>>>> snip <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
class FormLoc:
'base class for Form Locators to hold programming and business logic'
count = 0
# *************** constructor *************** #
def __init__(self):
FormLoc.count = FormLoc.count + 1
self.Row = 0
self.Column = 0
self.Length = 0
self.Contents = ""
def setLength(self,len):
self.Length = len
def setContents(self,con):
self.Contents = con
if len(con) > self.Length:
assert len(con) <= self.Length
>>>>>>>>>>>>>>>>> snip <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Now, I used the '__main__' trick and ran this class by itself to test the
logic. Some of my test code is:
def main():
a = FormLoc()
a.setLength( 3 )
a.setContents( "A123" )
x = a.getPattern()
When the length is 3 or less, the assert correctly stops the script and,
when the length is 4 or greater, correctly lets the script to proceed. Since
these items do not exist in a vacuum(is-a has-a relationship), a parsed page
will have several of these. Therefore, my other class looks like:
import re
from FormLoc import FormLoc
class FORMbase:
'a template base class for making derived classes'
count = 0
def __init__(self): #everyone has an ID and type
self.IDNum = FormLoc()
self.CustType = FormLoc()
That is OK but the problem arises when I try to set the attributes of the
various FormLocs that the FORMbase has. Again, use the '__main__' trick to
put the class test code in itself:
def main():
t = FORMbase()
t.IDNum.setLength(2)
t.IDNum.setContents( "12345" )
Since the Length of the FormLoc is 2 and the length of the string that is
passed to it is 5, I would believe that the assert should stop the script as
it did earlier. The other thing that I don't understand is that the various
print statements that I put into the FormLoc.setContents() method print when
called from the FormLoc class but not from the FORMbase class. Yet, Python
will correctly call all of the methods for the FormLoc class.
Why doesn't the assert in the FormLoc stop the script when it is called from
the FORMbase class? Where is the output from the print statements going?
Thanks,
Will
_______________________________________________
ActivePython mailing list
[EMAIL PROTECTED]
To unsubscribe: http://listserv.ActiveState.com/mailman/mysubs
Other options: http://listserv.ActiveState.com/mailman/listinfo/ActivePython
