Python 3 on MacOS

[Israel Hands]

I have 2.7 and 3.7 installed but I can't get Leo to run under Python 3. If I type python3 at the command line it fires up. If I type python3 launch.leo I get ...(see below)

I changed the first line of launchleo.py to

#!/usr/bin/env python3

But that didn't help!  Ta like IH

Error in sitecustomize; set PYTHONVERBOSE for traceback:

AttributeError: module 'enum' has no attribute 'IntFlag'

Traceback (most recent call last):

  File "launchleo.py", line 7, in <module>

    import leo.core.runLeo

  File "/Applications/leo-editor-git/leo-editor/leo/core/runLeo.py", line 24, in <module>

    import leo.core.leoGlobals as leoGlobals

  File "/Applications/leo-editor-git/leo-editor/leo/core/leoGlobals.py", line 49, in <module>

    import gettext

  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/gettext.py", line 49, in <module>

    import locale

  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/locale.py", line 16, in <module>

    import re

  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/re.py", line 143, in <module>

    class RegexFlag(enum.IntFlag):

AttributeError: module 'enum' has no attribute 'IntFlag'

[Thomas Passin]

This seems to be something wrong about your Python installation, not Leo.  My Python 3.8 installation in Windows has the exact same line at the same line number (class RegexFlag(enum.IntFlag):) and it works for me. 

You could check this as follows:

1. Open a Python3 session.

2. Type the following:

import enum

enum.IntFlag

You should see

<enum 'IntFlag'>

If you get some kind of an error, you will know for sure it's a problem with your installation.

[Edward K. Ream]

On Mon, Sep 14, 2020 at 12:12 PM Israel Hands <alis...@mcgh.ee> wrote:

I have 2.7 and 3.7 installed but I can't get Leo to run under Python 3.

Heh. I'm having trouble installing python3 and qt on MacOS Catalina.

Whenever you get a weird error, it's good to develop the habit of googling it.

Googling "module 'enum' has no attribute 'IntFlag'" should help. The first hit might be all you need.

HTH.

Edward

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Edward K. Ream: edre...@gmail.com

An old man, crazy about computer programming.

Leo Editor: http://leoeditor.com/

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