Newbie class instance tracking system
Michael McGovern
mmcgover at pender.ee.upenn.edu
Wed May 9 15:57:27 EDT 2001
I am new to Python and I am having trouble with the following code. In short,
Why doesn't it work? I thought that variable names "spring into existence" in
a similar fasion to perl...
# I want to keep track of all the unique cars per company without repeating
#
# I get this error:
#Traceback (innermost last):
# File "quest.py", line 14, in ?
# prelude = Maker(carName='prelude',carCompany='Honda')
# File "quest.py", line 11, in __init__
# Maker.all_cars[carCompany].append(carName)
#KeyError: Honda
class Maker:
all_cars={}
def __init__(self,carName=None,carCompany=None):
self.carName = carName
self.carCompany = carCompany
Maker.all_cars[carCompany].append(carName)
# in perl, I would push(@{$all_cars{$carCompany}},$carName)
prelude = Maker(carName='prelude',carCompany='Honda')
accord = Maker(carName='accord',carCompany='Honda')
Thanks in advance,
Scott
mmcgover at pender dot ee dot upenn dot edu
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