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setattr for secondary attribute

I apologize for asking maybe a very trivial question.
I have a new class object A with slots. One of the slots is, for
example, object spam. Object spam, in turn, also has slots and one of
them is attribute eggs. I need to assign a new value to eggs. In other
words, I need to perform the following:

A.spam.eggs=newValue

The problem is that I have only a string s='spam.eggs' with which to
work, so I cannot write an expression written above. I tried to use
setattr:

setattr(A, s, newValue)

but this does not work. It says that object A does not have attribute
spam.eggs

How would you do it? TIA.

Nov 22 '05 #1
4 1445
Alex wrote:
I apologize for asking maybe a very trivial question.
I have a new class object A with slots. One of the slots is, for
example, object spam. Object spam, in turn, also has slots and one of
them is attribute eggs. I need to assign a new value to eggs. In other
words, I need to perform the following:

A.spam.eggs=newValue

The problem is that I have only a string s='spam.eggs' with which to
work, so I cannot write an expression written above. I tried to use
setattr:

setattr(A, s, newValue)

but this does not work. It says that object A does not have attribute
spam.eggs


since "eggs" is an attribute of the "spam" attribute, you need to fetch
the latter first:

setattr(getattr(A, "spam"), "eggs")

</F>

Nov 22 '05 #2
Alex wrote:
I apologize for asking maybe a very trivial question.
I have a new class object A with slots. One of the slots is, for
example, object spam. Object spam, in turn, also has slots and one of
them is attribute eggs. I need to assign a new value to eggs. In other
words, I need to perform the following:

A.spam.eggs=newValue

The problem is that I have only a string s='spam.eggs' with which to
work, so I cannot write an expression written above. I tried to use
setattr:

setattr(A, s, newValue)

but this does not work. It says that object A does not have attribute
spam.eggs


since "eggs" is an attribute of the "spam" attribute, you need to fetch
the latter first:

setattr(getattr(A, "spam"), "eggs")

</F>

Nov 22 '05 #3
Great! Thanks, it works (of course).

Nov 22 '05 #4
Great! Thanks, it works (of course).

Nov 22 '05 #5

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