[Scons-users] untar builder fails with error

[daggs]

> > I've decided to debug it on my home setup, it uses scons 4.4.0 and python 3.10.8
> > the code I'm using is this: https://dpaste.com/CA5CGYWNC and I'm getting this:
> > dagg at NCC-5001D ~/workspace/scons_untar $ scons .
> > scons: Reading SConscript files ...
> > AttributeError: 'map' object has no attribute 'side_effect':
> >    File "/home/dagg/workspace/scons_untar/SConstruct", line 40:
> >      thirdPartyEnvironment.UnTar(source="apr-1.3.3")
> >    File "/usr/lib/python3.10/site-packages/SCons/Environment.py", line 238:
> >      return super().__call__(target, source, *args, **kw)
> >    File "/usr/lib/python3.10/site-packages/SCons/Util.py", line 737:
> >      return self.method(*nargs, **kwargs)
> >    File "/usr/lib/python3.10/site-packages/SCons/Builder.py", line 663:
> >      return self._execute(env, target, source, OverrideWarner(kw), ekw)
> >    File "/usr/lib/python3.10/site-packages/SCons/Builder.py", line 579:
> >      _node_errors(self, env, tlist, slist)
> >    File "/usr/lib/python3.10/site-packages/SCons/Builder.py", line 291:
> >      if t.side_effect:
> 
> In Python 3, the map function returns a map object, which is an 
> iterable, not a list. You can iterate over it - which is the usual 
> operation - but not otherwise do much with it. You will have to create a 
> list out of the result of mapping (we could argue that SCons' logic 
> should accept any iterable here but that's a different story).
> 
>  >>> x = [1, 2, 3]
>  >>> y = map(str, x)
>  >>> print(y)
> <map object at 0x7ff5e5590d00>
>  >>> print(list(y))
> ['1', '2', '3']
> 
> 
> So probably this will help:
> 
> newTargets = list(map(tarInfoToNode, tarFileContents))

thanks, that worked.
funny thing, I've encountered the same issue when migrating a old python 2.7 script to python 3.
I forgot about that.

Dagg