Re: Class data being zapped by method

arenium@xxxxxxxxx wrote:
Hi,

I'll cut to the chase.

I have a class named Foo(). I create an instance of this class named
bar, and I set bar.data to a large list of tuples.

Within Foo() there is a method which operates on self.data. I need to
call this method after I set self.data from the "outside" (bar.data),
which isn't a problem. However, I have found through simple debugging
procedures that while bar.data exists fine before the said method is
called, self.data within the class method is EMPTY. In my class
constructor I do declare self.data to be an empty list ([]), but
shouldn't self.data contain the populated list?

Basically...

--------------------------------------------------------------------------
class Foo():
__init__(self):
self.data = []
a_count(self):
....
print self.data
....

bar = Foo()
bar.data = [(-74.0015, 1), (123.451, 18), ...]
print bar.data # Get what I expect
bar.a_count() # []
--------------------------------------------------------------------------
Well, ... you have not told us the whole story here. This code works as expected.

>>> class Foo():
.... def __init__(self):
.... self.data = []
.... def a_count(self):
.... print self.data
....
>>> bar = Foo()
>>> bar.data = [(-74.0015, 1), (123.451, 18)]
>>> print bar.data
[(-74.001499999999993, 1), (123.45099999999999, 18)]
>>> bar.a_count()
[(-74.001499999999993, 1), (123.45099999999999, 18)]
>>>


You effort to reduce your real code to a simple demonstration of the problem is appreciated, but I don't think it worked in this case.

Want to try again?


Gary Herron

.

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