error install Ubuntu 16.04

[indevor]

1. ssh-keygen - ok
2. sudo apt-get install git python3 python3-venv - ok
3. git clone https://github.com/StreisandEffect/streisand.git && cd streisand - ok
4. ./util/venv-dependencies.sh ./venv``

`root@advertjobsprofit1:~/streisand# ./util/venv-dependencies.sh ./venv
Found a python3 command....

This system appears to be running Ubuntu or Debian. Checking
for critical packages.

Found: build-essential
Found: python3-pip
Found: python3-openssl
Found: python3-dev
Found: python3-setuptools
Found: python3-venv
Found: python-cffi
Found: libffi-dev
Found: libssl-dev
Found: libcurl4-openssl-dev

Found all critical packages.

Collecting pip
Using cached https://files.pythonhosted.org/packages/fe/ef/60d7ba03b5c442309ef42e7d69959f73aacccd0d86008362a681c4698e83/pip-21.0.1-py3-none-any.whl
Installing collected packages: pip
Found existing installation: pip 8.1.1
Uninstalling pip-8.1.1:
Successfully uninstalled pip-8.1.1
Successfully installed pip-21.0.1
Traceback (most recent call last):
File "/root/streisand/venv/bin/pip3", line 7, in
from pip._internal.cli.main import main
File "/root/streisand/venv/lib/python3.5/site-packages/pip/_internal/cli/main.py", line 60
sys.stderr.write(f"ERROR: {exc}")`

5. (venv) root@advertjobsprofit1:~/streisand# source ./venv/bin/activate
6. (venv) root@advertjobsprofit1:~/streisand# ./streisand

S T R E I S A N D

Streisand requires Ansible and it is not installed.
Please see the README Installation section on Prerequisites

[h-saber]

I've solved this issue by updating Python to 3.9 and all pip versions to 21.
But I receive a nonsense error when trying ./util/venv-dependencies.sh ./venv
Here it is:

Error: Command '['/root/streisand/venv/bin/python3', '-Im', 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit status 1.

'python -m venv' failed to create directory './venv'

Note that ./venv must not exist, but its parent (.) must
exist.

The first argument, 'new-directory', must be somewhere you can write
to. A good place is './venv'. If it already exists, please delete the
directory, or use a different name.

This error happens while no venv directory exists there.

OS: Ubuntu 16.04

[D1E7BF44]

You need to change line 253 of /util/venv-dependencies.sh to our_pip_install --upgrade 'pip < 21.0'.

[h-saber]

You need to change line 253 of /util/venv-dependencies.sh to our_pip_install --upgrade 'pip < 21.0'.

I did try this before your comment, but the scripts stops on cryptography and says you should upgrade to latest pip.

[changhefirst]

Do not upgrade python to 3.9, stay 3.5, but only upgrade the pip to 19.0.1, then comment all the 'pip_install' phases. (should two places, search all the codes.)

The codes are nearly too old.