In writing a Python (2.5) program, I tried to create a class and, in its __init__
function, automatically create an instance of another class with its name as an argument to the __init__
function, something like this:
class Class1:
def __init__(self,attribute):
self.attribute1=attribute
class Class2:
def __init__(self,instanceName):
#any of Class2's attributes
exec instanceName + '=Class1('attribute1')'
# this should produce an instance of Class1 whose name is instanceName
But when I make an instance of Class2, instance=Class2('instance2')
, and try to get attribute1 of instance2 (which should have been created from Class2's __init__
function) I get an error message:
Traceback (most recent call last):
File "<pyshell#29>", line 1, in <module>
print instance2.attribute1
NameError: name 'instance2' is not defined
I don't know what the problem is, since name='instance3'
and exec name+'=Class1('attribute1')
does work, though this is probably because I don't have much experience with Python. How would I be able to do something like this automatically when an instance is created?
I have to run, so hopefully, someone else can fix any mistakes in this post:
class Class1:
def __init__(self, attribute):
self.attribute1 = attribute
class Class2:
def __init__(self, instanceName):
setattr(self, instanceName, Class1(...)) # replace ... with whatever parameters you want
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