Remove Python 2 specific parts from integration tests (#10897)

* Remove Python 2 specific parts from integration tests.

* Remove more constraints.

tests/integration/targets/apache2_mod_proxy/tasks/main.yml

@@ -71,7 +71,7 @@
 
 - name: Install BeautifulSoup
   pip:
-    name: "{{ 'BeautifulSoup' if ansible_python_version is version('3', '<') else 'BeautifulSoup4' }}"
+    name: BeautifulSoup4
     extra_args: "-c {{ remote_constraints }}"
 
 - name: Get all current balancer pool members attributes

tests/integration/targets/archive/tasks/main.yml

@@ -51,49 +51,6 @@
   apt: name=zip state=latest
   when: ansible_facts.pkg_mgr == 'apt'
 
-- name: Install prerequisites for backports.lzma when using python2 (non OSX)
-  block:
-    - name: Set liblzma package name depending on the OS
-      set_fact:
-        liblzma_dev_package:
-          Debian: liblzma-dev
-          RedHat: xz-devel
-          Suse: xz-devel
-    - name: Ensure liblzma-dev is present to install backports-lzma
-      package: name={{ liblzma_dev_package[ansible_os_family] }} state=latest
-      when: ansible_os_family in liblzma_dev_package.keys()
-  when:
-    - ansible_python_version.split('.')[0] == '2'
-    - ansible_os_family != 'Darwin'
-
-- name: Install prerequisites for backports.lzma when using python2 (OSX)
-  block:
-    - name: Find brew binary
-      command: which brew
-      register: brew_which
-    - name: Get owner of brew binary
-      stat: path="{{ brew_which.stdout }}"
-      register: brew_stat
-    - name: "Install package"
-      homebrew:
-        name: xz
-        state: present
-        update_homebrew: false
-      become: true
-      become_user: "{{ brew_stat.stat.pw_name }}"
-      # Newer versions of brew want to compile a package which takes a long time. Do not upgrade homebrew until a
-      # proper solution can be found
-      environment:
-        HOMEBREW_NO_AUTO_UPDATE: "True"
-  when:
-    - ansible_python_version.split('.')[0] == '2'
-    - ansible_os_family == 'Darwin'
-
-- name: Ensure backports.lzma is present to create test archive (pip)
-  pip: name=backports.lzma state=latest
-  when: ansible_python_version.split('.')[0] == '2'
-  register: backports_lzma_pip
-
 - name: Define formats to test
   set_fact:
     formats:
@@ -138,8 +95,3 @@
   loop: "{{ formats }}"
   loop_control:
     loop_var: format
-
-# Test cleanup
-- name: Remove backports.lzma if previously installed (pip)
-  pip: name=backports.lzma state=absent
-  when: backports_lzma_pip is changed

tests/integration/targets/cloud_init_data_facts/tasks/main.yml

@@ -22,11 +22,8 @@
   # to /etc/init/ureadahead.conf.disabled by cloud-init' clashes with `local diversion of
   # /etc/init/ureadahead.conf to /etc/init/ureadahead.conf.distrib
   # https://bugs.launchpad.net/ubuntu/+source/ureadahead/+bug/997838
-  # Will also have to skip on OpenSUSE when running on Python 2 on newer Leap versions
-  # (!= 42 and >= 15) as cloud-init will install the Python 3 package, breaking our build on py2.
   when:
     - not (ansible_distribution == "Ubuntu" and ansible_distribution_major_version|int == 14)
-    - not (ansible_os_family == "Suse" and ansible_distribution_major_version|int != 42 and ansible_python.version.major != 3)
     - not (ansible_os_family == "Suse" and ansible_distribution_major_version|int == 15)
     - not (ansible_distribution == "CentOS" and ansible_distribution_major_version|int == 8)  # TODO: cannot start service
     - not (ansible_distribution == 'Archlinux')  # TODO: package seems to be broken, cannot be downloaded from mirrors?

tests/integration/targets/decompress/handlers/main.yml

@@ -1,9 +0,0 @@
----
-# Copyright (c) Ansible Project
-# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-- name: delete backports.lzma
-  pip:
-    name: backports.lzma
-    state: absent

tests/integration/targets/decompress/tasks/main.yml

@@ -37,24 +37,7 @@
     state: latest
   when: ansible_os_family == 'Debian'
 
-- name: Install prerequisites for backports.lzma when using python2 (non OSX)
-  block:
-    - name: Set liblzma package name depending on the OS
-      set_fact:
-        liblzma_dev_package:
-          Debian: liblzma-dev
-          RedHat: xz-devel
-          Suse: xz-devel
-    - name: Ensure liblzma-dev is present to install backports-lzma
-      package:
-        name: "{{ liblzma_dev_package[ansible_os_family] }}"
-        state: latest
-      when: ansible_os_family in liblzma_dev_package.keys()
-  when:
-    - ansible_python_version.split('.')[0] == '2'
-    - ansible_os_family != 'Darwin'
-
-- name: Install prerequisites for backports.lzma when using python2 (OSX)
+- name: Ensure xz is present to create compressed file (macOS)
   block:
     - name: Find brew binary
       command: which brew
@@ -77,14 +60,6 @@
   when:
     - ansible_os_family == 'Darwin'
 
-- name: Ensure backports.lzma is present to create test archive (pip)
-  pip:
-    name: backports.lzma
-    state: latest
-  when: ansible_python_version.split('.')[0] == '2'
-  notify:
-    - delete backports.lzma
-
 - name: Generate compressed files
   shell: |
     gzip < {{ item }} > {{ item }}.gz

tests/integration/targets/filesystem/tasks/main.yml

@@ -82,11 +82,6 @@
     - 'not (ansible_distribution == "CentOS" and ansible_distribution_version is version("7.0", "<") and
             item.1 == "overwrite_another_fs")'
 
-    # The xfsprogs package on newer versions of OpenSUSE (15+) require Python 3, we skip this on our Python 2 container
-    # OpenSUSE 42.3 Python2 and the other py3 containers are not affected so we will continue to run that
-    - 'not (ansible_os_family == "Suse" and ansible_distribution_major_version|int != 42 and
-            item.0.key == "xfs" and ansible_python.version.major == 2)'
-
     # TODO: something seems to be broken on Alpine
     - 'not (ansible_distribution == "Alpine")'
 

tests/integration/targets/filesystem/tasks/setup.yml

@@ -10,8 +10,6 @@
   ansible.builtin.package:
     name: '{{ item }}'
     state: present
-  # xfsprogs on OpenSUSE requires Python 3, skip this for our newer Py2 OpenSUSE builds
-  when: not (item == 'xfsprogs' and ansible_os_family == 'Suse' and ansible_python.version.major == 2 and ansible_distribution_major_version|int != 42)
   loop:
     - e2fsprogs
     - xfsprogs
@@ -48,7 +46,7 @@
 - name: "Install btrfs progs (OpenSuse)"
   ansible.builtin.package:
     name:
-      - python{{ ansible_python.version.major }}-xml
+      - python3-xml
       - btrfsprogs
     state: present
   when: ansible_os_family == 'Suse'

tests/integration/targets/setup_etcd3/tasks/main.yml

@@ -15,24 +15,13 @@
 # setup etcd3 for supported distros
 - block:
 
-    - name: python 2
-      set_fact:
-        python_suffix: ""
-      when: ansible_python_version is version('3', '<')
-
-    - name: python 3
-      set_fact:
-        python_suffix: "-py3"
-      when: ansible_python_version is version('3', '>=')
-
     - include_vars: '{{ item }}'
       with_first_found:
         - files:
-            - '{{ ansible_distribution }}-{{ ansible_distribution_major_version }}{{ python_suffix }}.yml'
-            - '{{ ansible_distribution }}-{{ ansible_distribution_version }}{{ python_suffix }}.yml'
-            - '{{ ansible_os_family }}-{{ ansible_distribution_major_version }}{{ python_suffix }}.yml'
-            - '{{ ansible_os_family }}{{ python_suffix }}.yml'
-            - 'default{{ python_suffix }}.yml'
+            - '{{ ansible_distribution }}-{{ ansible_distribution_major_version }}.yml'
+            - '{{ ansible_distribution }}-{{ ansible_distribution_version }}.yml'
+            - '{{ ansible_os_family }}-{{ ansible_distribution_major_version }}.yml'
+            - '{{ ansible_os_family }}.yml'
             - 'default.yml'
           paths: '../vars'
 

tests/integration/targets/setup_etcd3/vars/RedHat-7.yml

@@ -1,6 +0,0 @@
----
-# Copyright (c) Ansible Project
-# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-etcd3_pip_module: etcd3<0.12

tests/integration/targets/setup_etcd3/vars/Suse-py3.yml

@@ -1,8 +0,0 @@
----
-# Copyright (c) Ansible Project
-# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# SuSE's python 3.6.10 comes with six 1.11.0 as distutil
-# we restrict to etcd3 < 0.11 to avoid pip to try to upgrade six
-etcd3_pip_module: 'etcd3<0.11'

tests/integration/targets/setup_openldap/tasks/main.yml

@@ -19,17 +19,10 @@
         name: '{{ item }}'
       loop: '{{ openldap_packages_name }}'
 
-    - name: Install python-ldap (Python 3)
+    - name: Install python-ldap
       become: true
       package:
         name: '{{ python_ldap_package_name_python3 }}'
-      when: ansible_python_version is version('3.0', '>=')
-
-    - name: Install python-ldap (Python 2)
-      become: true
-      package:
-        name: '{{ python_ldap_package_name }}'
-      when: ansible_python_version is version('3.0', '<')
 
     - name: Make sure OpenLDAP service is stopped
       become: true

tests/integration/targets/setup_openssl/tasks/main.yml

@@ -29,17 +29,11 @@
 
 - when: ansible_facts.distribution ~ ansible_facts.distribution_major_version not in  ['CentOS6', 'RedHat6']
   block:
-    - name: Install cryptography (Python 3)
+    - name: Install cryptography
       become: true
       package:
         name: '{{ cryptography_package_name_python3 }}'
-      when: not cryptography_from_pip and ansible_python_version is version('3.0', '>=')
-
-    - name: Install cryptography (Python 2)
-      become: true
-      package:
-        name: '{{ cryptography_package_name }}'
-      when: not cryptography_from_pip and ansible_python_version is version('3.0', '<')
+      when: not cryptography_from_pip
 
     - name: Install cryptography (pip)
       become: true
@@ -48,17 +42,11 @@
         extra_args: "-c {{ remote_constraints }}"
       when: cryptography_from_pip
 
-- name: Install pyOpenSSL (Python 3)
+- name: Install pyOpenSSL
   become: true
   package:
     name: '{{ pyopenssl_package_name_python3 }}'
-  when: pyopenssl_package_name_python3 is defined and ansible_python_version is version('3.0', '>=')
-
-- name: Install pyOpenSSL (Python 2)
-  become: true
-  package:
-    name: '{{ pyopenssl_package_name }}'
-  when: pyopenssl_package_name is defined and ansible_python_version is version('3.0', '<')
+  when: pyopenssl_package_name_python3 is defined
 
 - name: register openssl version
   shell: "openssl version | cut -d' ' -f2"

tests/integration/targets/setup_postgresql_db/tasks/main.yml

@@ -20,25 +20,15 @@
 - meta: end_play
   when: ansible_facts.distribution == 'Fedora' and ansible_facts.distribution_major_version == '34'
 
-- name: python 2
-  set_fact:
-    python_suffix: ''
-  when: ansible_python_version is version('3', '<')
-
-- name: python 3
-  set_fact:
-    python_suffix: -py3
-  when: ansible_python_version is version('3', '>=')
-
 - name: Include distribution and Python version specific variables
   include_vars: '{{ lookup(''first_found'', params) }}'
   vars:
     params:
       files:
-        - '{{ ansible_distribution }}-{{ ansible_distribution_major_version }}{{ python_suffix }}.yml'
-        - '{{ ansible_distribution }}-{{ ansible_distribution_version }}{{ python_suffix }}.yml'
-        - '{{ ansible_os_family }}{{ python_suffix }}.yml'
-        - default{{ python_suffix }}.yml
+        - '{{ ansible_distribution }}-{{ ansible_distribution_major_version }}.yml'
+        - '{{ ansible_distribution }}-{{ ansible_distribution_version }}.yml'
+        - '{{ ansible_os_family }}.yml'
+        - default.yml
       paths:
         - '{{ role_path }}/vars'
 

tests/integration/targets/setup_postgresql_db/vars/Debian-8.yml

@@ -1,13 +0,0 @@
----
-# Copyright (c) Ansible Project
-# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-postgresql_packages:
-  - "postgresql"
-  - "postgresql-common"
-  - "python-psycopg2"
-
-pg_hba_location: "/etc/postgresql/9.4/main/pg_hba.conf"
-pg_dir: "/var/lib/postgresql/9.4/main"
-pg_ver: 9.4

tests/integration/targets/setup_postgresql_db/vars/FreeBSD-11-py3.yml

@@ -1,17 +0,0 @@
----
-# Copyright (c) Ansible Project
-# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-postgresql_packages:
-  - postgresql95-server
-  - "py{{ ansible_python.version.major }}{{ ansible_python.version.minor }}-psycopg2"
-
-pg_dir: /usr/local/pgsql/data
-pg_hba_location: "{{ pg_dir }}/pg_hba.conf"
-pg_ver: 9.5
-pg_user: pgsql
-pg_group: pgsql
-
-locale_latin_suffix: .ISO8859-1
-locale_utf8_suffix: .UTF-8

tests/integration/targets/setup_postgresql_db/vars/FreeBSD-11.yml

@@ -5,7 +5,7 @@
 
 postgresql_packages:
   - postgresql95-server
-  - py27-psycopg2
+  - "py{{ ansible_python.version.major }}{{ ansible_python.version.minor }}-psycopg2"
 
 pg_dir: /usr/local/pgsql/data
 pg_hba_location: "{{ pg_dir }}/pg_hba.conf"

tests/integration/targets/setup_postgresql_db/vars/FreeBSD-12.0-py3.yml

@@ -1,17 +0,0 @@
----
-# Copyright (c) Ansible Project
-# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-postgresql_packages:
-  - postgresql95-server
-  - "py{{ ansible_python.version.major }}{{ ansible_python.version.minor }}-psycopg2"
-
-pg_dir: /usr/local/pgsql/data
-pg_hba_location: "{{ pg_dir }}/pg_hba.conf"
-pg_ver: 9.5
-pg_user: pgsql
-pg_group: pgsql
-
-locale_latin_suffix: .ISO8859-1
-locale_utf8_suffix: .UTF-8

tests/integration/targets/setup_postgresql_db/vars/FreeBSD-12.0.yml

@@ -4,12 +4,12 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 postgresql_packages:
-  - postgresql96-server
-  - py27-psycopg2
+  - postgresql95-server
+  - "py{{ ansible_python.version.major }}{{ ansible_python.version.minor }}-psycopg2"
 
 pg_dir: /usr/local/pgsql/data
 pg_hba_location: "{{ pg_dir }}/pg_hba.conf"
-pg_ver: 9.6
+pg_ver: 9.5
 pg_user: pgsql
 pg_group: pgsql
 

tests/integration/targets/setup_postgresql_db/vars/FreeBSD-12.1-py3.yml

@@ -1,17 +0,0 @@
----
-# Copyright (c) Ansible Project
-# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-postgresql_packages:
-  - postgresql11-server
-  - "py{{ ansible_python.version.major }}{{ ansible_python.version.minor }}-psycopg2"
-
-pg_dir: /var/db/postgres/data11
-pg_hba_location: "{{ pg_dir }}/pg_hba.conf"
-pg_ver: 11
-pg_user: postgres
-pg_group: postgres
-
-locale_latin_suffix: .ISO8859-1
-locale_utf8_suffix: .UTF-8

tests/integration/targets/setup_postgresql_db/vars/FreeBSD-12.1.yml

@@ -5,7 +5,7 @@
 
 postgresql_packages:
   - postgresql11-server
-  - py27-psycopg2
+  - "py{{ ansible_python.version.major }}{{ ansible_python.version.minor }}-psycopg2"
 
 pg_dir: /var/db/postgres/data11
 pg_hba_location: "{{ pg_dir }}/pg_hba.conf"

tests/integration/targets/setup_postgresql_db/vars/RedHat-py3.yml

@@ -1,13 +0,0 @@
----
-# Copyright (c) Ansible Project
-# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-postgresql_packages:
-  - "postgresql-server"
-  - "python3-psycopg2"
-  - "bzip2"
-  - "xz"
-
-pg_hba_location: "/var/lib/pgsql/data/pg_hba.conf"
-pg_dir: "/var/lib/pgsql/data"

tests/integration/targets/setup_postgresql_db/vars/RedHat.yml

@@ -5,8 +5,9 @@
 
 postgresql_packages:
   - "postgresql-server"
-  - "python-psycopg2"
+  - "python3-psycopg2"
   - "bzip2"
+  - "xz"
 
 pg_hba_location: "/var/lib/pgsql/data/pg_hba.conf"
 pg_dir: "/var/lib/pgsql/data"

tests/integration/targets/setup_postgresql_db/vars/Ubuntu-12.yml

@@ -1,13 +0,0 @@
----
-# Copyright (c) Ansible Project
-# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-postgresql_packages:
-  - "postgresql"
-  - "postgresql-common"
-  - "python-psycopg2"
-
-pg_hba_location: "/etc/postgresql/9.1/main/pg_hba.conf"
-pg_dir: "/var/lib/postgresql/9.1/main"
-pg_ver: 9.1

tests/integration/targets/setup_postgresql_db/vars/Ubuntu-14.yml

@@ -1,13 +0,0 @@
----
-# Copyright (c) Ansible Project
-# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-postgresql_packages:
-  - "postgresql"
-  - "postgresql-common"
-  - "python-psycopg2"
-
-pg_hba_location: "/etc/postgresql/9.3/main/pg_hba.conf"
-pg_dir: "/var/lib/postgresql/9.3/main"
-pg_ver: 9.3

tests/integration/targets/setup_postgresql_db/vars/Ubuntu-16-py3.yml

@@ -1,13 +0,0 @@
----
-# Copyright (c) Ansible Project
-# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-postgresql_packages:
-  - "postgresql"
-  - "postgresql-common"
-  - "python3-psycopg2"
-
-pg_hba_location: "/etc/postgresql/9.5/main/pg_hba.conf"
-pg_dir: "/var/lib/postgresql/9.5/main"
-pg_ver: 9.5

tests/integration/targets/setup_postgresql_db/vars/Ubuntu-16.yml

@@ -6,7 +6,7 @@
 postgresql_packages:
   - "postgresql"
   - "postgresql-common"
-  - "python-psycopg2"
+  - "python3-psycopg2"
 
 pg_hba_location: "/etc/postgresql/9.5/main/pg_hba.conf"
 pg_dir: "/var/lib/postgresql/9.5/main"

tests/integration/targets/setup_postgresql_db/vars/default-py3.yml

@@ -1,11 +0,0 @@
----
-# Copyright (c) Ansible Project
-# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-postgresql_packages:
-  - "postgresql-server"
-  - "python3-psycopg2"
-
-pg_hba_location: "/var/lib/pgsql/data/pg_hba.conf"
-pg_dir: "/var/lib/pgsql/data"

tests/integration/targets/setup_postgresql_db/vars/default.yml

@@ -5,7 +5,7 @@
 
 postgresql_packages:
   - "postgresql-server"
-  - "python-psycopg2"
+  - "python3-psycopg2"
 
 pg_hba_location: "/var/lib/pgsql/data/pg_hba.conf"
 pg_dir: "/var/lib/pgsql/data"

tests/utils/constraints.txt

@@ -2,30 +2,19 @@
 # GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
 # SPDX-License-Identifier: GPL-3.0-or-later
 
-certifi < 2022.5.18 ; python_version < '3.5' # certifi 2022.5.18 requires Python 3.5 or later
-cryptography >= 3.0, < 3.4 ; python_version < '3.6' # cryptography 3.4 drops support for python 2.7
 cryptography >= 3.3, < 3.4 ; python_version < '3.9' # FIXME: the upper limit is needed for RHEL8.2, CentOS 8, Ubuntu 18.04, and OpenSuSE 15
-deepdiff < 4.0.0 ; python_version < '3' # deepdiff 4.0.0 and later require python 3
 pywinrm >= 0.3.0 # message encryption support
 pycrypto >= 2.6 # Need features found in 2.6 and greater
 ncclient >= 0.5.2 # Need features added in 0.5.2 and greater
-python-nomad < 2.0.0 ; python_version <= '3.7'  # python-nomad 2.0.0 needs Python 3.7+
 ntlm-auth >= 1.3.0 # message encryption support using cryptography
-requests < 2.28 ; python_version < '3.7' # requests 2.28.0 drops support for python 3.6 and before
 requests-ntlm >= 1.1.0 # message encryption support
 requests-credssp >= 0.1.0 # message encryption support
 voluptuous >= 0.11.0 # Schema recursion via Self
 openshift >= 0.6.2, < 0.9.0 # merge_type support
-pyopenssl < 22.0.0 ; python_version < '3.6' # pyOpenSSL 22.0.0 and later require python 3.6 or later
 pyfmg == 0.6.1 # newer versions do not pass current unit tests
-mock >= 2.0.0 # needed for features backported from Python 3.6 unittest.mock (assert_called, assert_called_once...)
 pytest-mock >= 1.4.0 # needed for mock_use_standalone_module pytest option
 pyone == 1.1.9 # newer versions do not pass current integration tests
 cffi >= 1.14.2, != 1.14.3 # Yanked version which older versions of pip will still install:
-redis < 4.0.0 ; python_version < '3.6'
-redis ; python_version >= '3.6'
-pycdlib < 1.13.0 ; python_version < '3'  # 1.13.0 does not work with Python 2, while not declaring that
-python-daemon <= 2.3.0 ; python_version < '3'
 bcrypt < 4.0.0  # TEMP: restrict to < 4.0.0 since installing 4.0.0 fails on RHEL 8
 py-consul < 1.3.0 ; python_version < '3.8'  # 1.3.0 dropped support for Python 3.5, 3.6, 3.7
 py-consul < 1.5.4 ; python_version < '3.9'  # 1.5.4 dropped support for Python 3.8