Creating object in function doesn't seem to create a new object.

[Paul Childs]

Hi folks,

I'll start off with the code I wrote...
(ActivePython 2.4 on Windows XP SP2)

-------------------------------
class FlightCondition(object):

    lsf = [0,'Low Speed Flare']
    vto = [0,'Vertical Take-Off']

def get_flight_condition(flight_data):

    fc1 = FlightCondition()

    for row in flight_data:

        fc1.lsf[0] += 1
        fc1.vto[0] += 1


    print 'in function get_flight_condition'
    print fc1.lsf
    print fc1.vto

    return fc1

for count in range(3):

    fc = get_flight_condition([1,2,3])

    print 'returned fc'
    print fc.lsf
    print fc.vto
---------------------------------

When I run it I get...

in function get_flight_condition
[3, 'Low Speed Flare']
[3, 'Vertical Take-Off']
returned fc
[3, 'Low Speed Flare']
[3, 'Vertical Take-Off']
in function get_flight_condition
[6, 'Low Speed Flare']
[6, 'Vertical Take-Off']
returned fc
[6, 'Low Speed Flare']
[6, 'Vertical Take-Off']
in function get_flight_condition
[9, 'Low Speed Flare']
[9, 'Vertical Take-Off']
returned fc
[9, 'Low Speed Flare']
[9, 'Vertical Take-Off']

---------------------------------
I thought that when I wrote fc1 = FlightCondition() in the function it
would create a new FlightCondition object which would be passed back
every time.
Instead it seems to re-reference the old version and continue to add
to it.

---------------------------------
What I expected was...

in function get_flight_condition
[3, 'Low Speed Flare']
[3, 'Vertical Take-Off']
returned fc
[3, 'Low Speed Flare']
[3, 'Vertical Take-Off']
in function get_flight_condition
[3, 'Low Speed Flare']
[3, 'Vertical Take-Off']
returned fc
[3, 'Low Speed Flare']
[3, 'Vertical Take-Off']
in function get_flight_condition
[3, 'Low Speed Flare']
[3, 'Vertical Take-Off']
returned fc
[3, 'Low Speed Flare']
[3, 'Vertical Take-Off']

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

Could someone please explain to me why I get the output I did instead
of what I expected.

How do I code my function so I get a new fc1 every time and my desired
output?

Thanks in advance.

/Paul