[issue21480] A build now requires...

[paul j3]

paul j3 added the comment:

I ran into a (possibly) related compiling problem (for 'default', 3.5 branch) in `asdl.py`:

    class Module(AST):
        def __init__(self, name, dfns):
            ...
            self.types = {type.name: type.value for type in dfns}

The dictionary comprehension syntax means this can only be run with Python3.

With an older Ubuntu installation, python2.6 is my default 'python'.

I had to make a local `python3` link to an earlier development python3.4 to get around this.

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nosy: +paul.j3

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<http://bugs.python.org/issue21480>
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