harold fellermann wrote:
Python 2.4 (#1, Dec 30 2004, 08:00:10)
[GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> class X : pass
...
>>> attrname = "attr"
>>> eval("X.%s = val" % attrname , {"X":X, "val":5})
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "<string>", line 1
X.attr = val
^
SyntaxError: invalid syntax
You may want to use exec instead of eval:
py> class X(object):
... pass
...
py> attrname = "attr"
py> exec "X.%s = val" % attrname in dict(X=X, val=5)
py> X.attr
5
But personally, I'd use setattr, since that's what it's for:
py> class X(object):
... pass
...
py> attrname = "attr"
py> setattr(X, attrname, 5)
py> X.attr
5
Steve
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