Python3 exec locals - this must be a FAQ
davea at davea.name
Tue Feb 12 14:27:41 CET 2013
On 02/12/2013 06:46 AM, Helmut Jarausch wrote:
> I've tried but didn't find an answer on the net.
> The exec function in Python modifies a copy of locals() only.
> How can I transfer changes in that local copy to the locals of my function
> ** without ** knowing the names of these variables.
> E.g. I have a lot of local names.
> _locals= locals()
This doesn't copy everything. But perhaps you know that and you're just
> expr=compile(input('statements assigning to some local variables '),
> 'user input','exec')
> How can I "copy" the new values within _locals to my current locals.
> If I knew that Var1 has changed I could say
> Var1 = _locals['Var1'] but what to do in general?
locals()["Var1"] = _locals["Var1"] will set the same Var1 local.
So you might write a loop on _locals.
But beware if someone has deleted one of the "variables" it may not do
what you'd like. You cannot necessarily add back a local with the above
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