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Python3 exec locals - this must be a FAQ

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Hi,

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.

Doing

_locals= locals()
expr=compile(input('statements assigning to some local variables '),
                                                 'user input','exec')
exec(expr,globals(),_locals)

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?

Many thanks for a hint,
Helmut.

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Python3 exec locals - this must be a FAQ Helmut Jarausch <jarausch@igpm.rwth-aachen.de> - 2013-02-12 11:46 +0000
  Re: Python3 exec locals - this must be a FAQ Dave Angel <davea@davea.name> - 2013-02-12 08:27 -0500
    Re: Python3 exec locals - this must be a FAQ Helmut Jarausch <jarausch@skynet.be> - 2013-02-12 14:29 +0000
      Re: Python3 exec locals - this must be a FAQ Dave Angel <davea@davea.name> - 2013-02-12 10:40 -0500
        Re: Python3 exec locals - this must be a FAQ Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-02-13 11:05 +1100
  Re: Python3 exec locals - this must be a FAQ MRAB <python@mrabarnett.plus.com> - 2013-02-12 15:15 +0000
  Re: Python3 exec locals - this must be a FAQ Terry Reedy <tjreedy@udel.edu> - 2013-02-12 10:50 -0500
  Re: Python3 exec locals - this must be a FAQ Dave Angel <davea@davea.name> - 2013-02-12 11:40 -0500

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