Gabriel Rossetti wrote:
<div class="moz-text-flowed" style="font-family: -moz-fixed">Hello
everyone,
I get this error on python 2.6.1 on mac os x 10.6 :
UnboundLocalError: local variable '_[1]' referenced before assignment
here's the code that raises this:
params = [ self.__formatData(paramProcFunc, query, p) for p in params ]
what I don't get is that it worked on mac os x 10.5 (python 2.5.x) but
it no longer works. I tried the following and it works :
r = []
for p in params:
r.append(self.__formatData(paramProcFunc, query, p))
params = r
Does anyone understand what is going on here?
Thank you,
Gabriel
</div>
Clearly you're not supplying enough context. The UnboundLocalError is
only raised inside a function (or method), and you only show one line of
that function.
And in the second example, it's even worse, since you imply it's
top-level code by carefully unindenting everything.
My *guess* is that you have a global variable params, which you're
looping on. And then you assign a local variable by the same name. If
you have an assignment anywhere in the function, that name is considered
a local, and if you reference it before you assign it, it'll generate
this error.
Three possible fixes, depending on why you're doing this.
1) pass the params in to the function as an argument
2) use a different name for the local thing you're building
3) use a global statement to force the compiler to use the global one
and not create a local. (probably a bad idea)
DaveA
--
http://mail.python.org/mailman/listinfo/python-list
