Stefan Behnel wrote:
<div class="moz-text-flowed">Alan Harris-Reid, 20.04.2010 15:43:
During my Python (3.1) programming I often find myself having to repeat
code such as...
class1.attr1 = 1
class1.attr2 = 2
class1.attr3 = 3
class1.attr4 = 4
etc.
Is there any way to achieve the same result without having to repeat the
class1 prefix? Before Python my previous main language was Visual
Foxpro, which had the syntax...
with class1
.attr1 = 1
.attr2 = 2
.attr3 = 3
.attr4 = 4
etc.
endwith
Is there any equivalent to this in Python?
There's more than one way to do this, depending on your actual needs
and the source of the attributes. I assume this is done in __init__?
This might work for you:
self.__dict__.update(attr1=1, attr2=2, attr3=3, attr4=4)
You should also think once more about the use of the code you
presented above, having to set all those attributes may have a little
smell. Maybe that's totally ok, but since you mention that you "often"
find yourself doing the above, you may also have a mental design
problem somewhere. We can't tell unless you provide a more concrete
example than what you show above.
Stefan
Hi Stefan, thanks for the reply.
The code is not usually in class.__init__ (otherwise I would have used
the self. prefix), but I like your self.__dict__.update(...) solution
and I'll try and remember it.
The code I was thinking of goes something like as follows (don't have a
specific example to hand, but the principal is the same)...
NewClass = BaseClass()
NewClass.attr1 = value1
NewClass.attr2 = value2
NewClass.attr3 = value3
etc.
So if there are more than a couple of attributes to set for a class
instance, how would you approach it (short of passing the values as
parameters to BaseClass)?
Regards,
Alan
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