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Test of A* implementation passes in Python3.8/Windows but fails in Python3.5/Ubuntu


By : Franco Guidi
Date : July 31 2020, 10:00 AM
it should still fix some issue The problem lies in this line that is deciding which square to consider next for the route:
code :
current = min([kv for kv in f_score.items() if kv[0] in open_set], key=lambda i: i[1])[0]
print("{} fscore: {} gscore: {}".format(current,
                                        f_score[current],
                                        g_score[current]))
Python 3.5                    Python 3.8
-----------------------       -----------------------                 
(1, 1) fscore: 8 gscore: 0    (1, 1) fscore: 8 gscore: 0
(2, 2) fscore: 8 gscore: 1    (2, 2) fscore: 8 gscore: 1
(3, 3) fscore: 8 gscore: 2    (3, 3) fscore: 8 gscore: 2
(4, 4) fscore: 8 gscore: 3    (4, 4) fscore: 8 gscore: 3
(1, 2) fscore: 9 gscore: 1    (5, 5) fscore: 8 gscore: 4 <= Here they start to vary
(3, 2) fscore: 9 gscore: 2    (6, 6) fscore: 8 gscore: 5
(2, 1) fscore: 9 gscore: 1    (7, 7) fscore: 8 gscore: 6
(2, 3) fscore: 9 gscore: 2    (8, 8) fscore: 8 gscore: 7
(4, 3) fscore: 9 gscore: 3    (9, 9) fscore: 8 gscore: 8
(5, 4) fscore: 9 gscore: 4    (1, 1) fscore: 8 gscore: 0
(3, 4) fscore: 9 gscore: 3    (2, 2) fscore: 8 gscore: 1
(6, 4) fscore: 10 gscore: 5   (3, 3) fscore: 8 gscore: 2
(1, 3) fscore: 10 gscore: 2   (4, 4) fscore: 8 gscore: 3
(7, 5) fscore: 10 gscore: 6   (1, 2) fscore: 9 gscore: 1
(6, 6) fscore: 10 gscore: 7   (2, 1) fscore: 9 gscore: 1
(7, 7) fscore: 10 gscore: 8   (2, 3) fscore: 9 gscore: 2
(4, 2) fscore: 10 gscore: 3   (3, 2) fscore: 9 gscore: 2
(5, 3) fscore: 10 gscore: 4   (3, 4) fscore: 9 gscore: 3
(7, 6) fscore: 10 gscore: 7   (4, 3) fscore: 9 gscore: 3
(8, 7) fscore: 10 gscore: 8   (5, 4) fscore: 9 gscore: 4
(9, 8) fscore: 10 gscore: 9   (1, 3) fscore: 10 gscore: 2
(3, 1) fscore: 10 gscore: 2   (3, 1) fscore: 10 gscore: 2
(8, 8) fscore: 10 gscore: 9   (2, 4) fscore: 10 gscore: 3
(8, 6) fscore: 10 gscore: 7   (4, 2) fscore: 10 gscore: 3
(9, 7) fscore: 10 gscore: 8   (5, 3) fscore: 10 gscore: 4
(9, 9) fscore: 10 gscore: 10  (6, 4) fscore: 10 gscore: 5
 Here Python3.5 is done       (7, 5) fscore: 10 gscore: 6
 in 26 steps                  ... Not done yet! ...
                              Python3.8 keeps going
                              to 36 steps total
def test_indirect_route(self):
    """
     01234567890
    0EEEEEEEEEEE
    1EsPPPPPPPPE
    2EP.PPPPPPPE
    3EPP.PPPPPPE
    4EPPP...PPPE
    5EWWWWWW.WWE
    6EPPPPP.PPPE
    7EPPPPPP.PPE
    8EPPPPPPP.PE
    9EPPPPPPPPgE
    0EEEEEEEEEEE
    Not the route I would have chosen, but the same length
    """
    test_map = Map()
    for x in range(1, 7):
        test_map[(x, 5)] = 'water'
    for x in range(8, 10):
        test_map[(x, 5)] = 'water'
    route = a_star((1, 1), (9, 9), test_map)
    self.assertIn((1, 1), route)
    self.assertIn((7, 5), route)
    self.assertIn((9, 9), route)
    self.assertEqual(11, len(route))


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pylint error runs fine in python3.2 but fails in python3.3


By : Ayu QoiruNisya
Date : March 29 2020, 07:55 AM
I wish did fix the issue. The "error" pylint reports on PyQT import is because since PyQT has some C++ or some C in it, pylint cannot easily and automatically introspect the PyQt module and determine if your code correctly imports bits of that 3rd party module.
To solve that, there is an plugin project to pylint called pylint-brains into which one can specify ways of introspecting specific modules (or faking their introspection). It would be nice to have a contribution that would remove the "E" of this pretty common import.

How can I adjust pip3 using python3.6 not python3.4 on Ubuntu 14.04?


By : user2095734
Date : March 29 2020, 07:55 AM
Does that help Hi the real problem is described here: https://stackoverflow.com/a/41722610/7933710 TLDR: Using a ppa on older Ubuntu systems is not consistent.
To repair your system you'll have to remove python3.6:
code :
apt-get remove --purge python3.6
add-apt-repository -r ppa:jonathonf/python-3.6
wget https://www.python.org/ftp/python/3.6.7/Python-3.6.7.tgz
apt-get install -y make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev  libncursesw5-dev xz-utils tk-dev
tar xvf Python-3.6.7.tgz
cd Python-3.6.7/
./configure --enable-optimizations --with-ensurepip=install
make -j 8
make altinstall
python3.6 -V
which python3.6
ls /usr/bin/python*  # e.g. /usr/bin/python2.7 /usr/bin/python3.4 /usr/bin/python3.6
update-alternatives --install /usr/bin/python python /usr/bin/python2.7 1
update-alternatives --install /usr/bin/python python /usr/bin/python3.4 1
update-alternatives --install /usr/bin/python python /usr/local/bin/python3.6 2

Pip is installed to python3.6 but I'm using python3.7 with VS Code on Ubuntu 18.04


By : Ryan
Date : March 29 2020, 07:55 AM
Any of those help After following stovfl's suggestions i realised that python 3 needed redirecting to the 3.7 install
I googled and found this article: http://ubuntuhandbook.org/index.php/2017/07/install-python-3-6-1-in-ubuntu-16-04-lts/

How i can upgrade my Ubuntu python3.7 to python3.8 latest version?


By : user3337918
Date : March 29 2020, 07:55 AM
Does that help pip is not capable of upgrading python - it is for python packages. Use,
code :
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
sudo apt-get install python3.8
sudo apt-get install python3.8-venv python3.8-dev

Upgrading python3.4 to python3.6 on ubuntu breaks pip


By : Maximus Berserker
Date : March 29 2020, 07:55 AM
will help you I managed to solve it without installing anything from sources. Here's what I did:
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