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[Octave-bug-tracker] [bug #58915] Symbolic error

From: Francois Laisney
Subject: [Octave-bug-tracker] [bug #58915] Symbolic error
Date: Fri, 7 Aug 2020 23:42:35 -0400 (EDT)
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.89 Safari/537.36


                 Summary: Symbolic error
                 Project: GNU Octave
            Submitted by: fl_163264
            Submitted on: Sat 08 Aug 2020 03:42:34 AM UTC
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error or Warning
                  Status: None
             Assigned to: None
         Originator Name: FL
        Originator Email: 
             Open/Closed: Open
                 Release: 5.1.0
         Discussion Lock: Any
        Operating System: Microsoft Windows



after using the two commands:
pkg install -forge symbolic
pkg load symbolic

I got that error message:

syms x
Symbolic pkg v2.9.0: error: Cannot run the Python executable "python3"
    Try "sympref diagnose" for more information.
error: called from
    assert_have_python_and_sympy at line 61 column 7
    python_ipc_popen2 at line 79 column 5
    python_ipc_driver at line 62 column 15
    pycall_sympy__ at line 163 column 11
    valid_sym_assumptions at line 38 column 10
    assumptions at line 82 column 7
    syms at line 97 column 13


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