使用分子测试 Ansible 角色时出错

我正在尝试学习如何使用分子角色测试工具。测试在 venv 虚拟环境中进行。

Python 版本 - 3.5.3。

实例 - ubuntu 18.04，驱动程序 - 码头工人。

测试顺利开始，当第一个任务执行时，会出现这样的错误墙：

Exception ignored in: <function WeakValueDictionary.__init__.<locals>.remove at 0x7f6778372f28>
Traceback (most recent call last):
  File "/usr/lib/python3.5/weakref.py", line 117, in remove

然后一切都按照脚本完成：

PLAY [Create] ******************************************************************

    TASK [Log into a Docker registry] **********************************************
    skipping: [localhost] => (item={'name': 'instance', 'image': 'ubuntu:bionic', 'pre_build_image': True})

    TASK [Check presence of custom Dockerfiles] ************************************
    ok: [localhost] => (item={'name': 'instance', 'image': 'ubuntu:bionic', 'pre_build_image': True})

    TASK [Create Dockerfiles from image names] *************************************
    skipping: [localhost] => (item={'name': 'instance', 'image': 'ubuntu:bionic', 'pre_build_image': True})

    TASK [Discover local Docker images] ********************************************
    ok: [localhost] => (item={'changed': False, 'skip_reason': 'Conditional result was False', 'skipped': True, 'item': {'name': 'instance', 'image': 'ubuntu:bionic', 'pre_build_image': True}, 'i': 0, 'ansible_loop_var': 'item', 'ansible_index_var': 'i'})

在收敛阶段，它会引发另一个错误：

fatal: [instance]: FAILED! => {
    "ansible_facts": {},
    "changed": false,
    "failed_modules": {
        "setup": {
            "ansible_facts": {
                "discovered_interpreter_python": "/usr/bin/python"
            },
            "failed": true,
            "module_stderr": "/bin/sh: 1: /usr/bin/python: not found\nread unix @->/var/run/docker.sock: read: connection reset by peer\n",
            "module_stdout": "",
            "msg": "The module failed to execute correctly, you probably need to set the interpreter.\nSee stdout/stderr for the exact error",
            "rc": 1,
            "warnings": [
                "No python interpreters found for host instance (tried ['/usr/bin/python', 'python3.7', 'python3.6', 'python3.5', 'python2.7', 'python2.6', '/usr/libexec/platform-python', '/usr/bin/python3', 'python'])"
            ]
        }
    },
    "msg": "The following modules failed to execute: setup\n"
}

    PLAY RECAP *********************************************************************
    instance                   : ok=0    changed=0    unreachable=0    failed=1    skipped=0    rescued=0    ignored=0

ERROR:

之后，脚本结束，所做的所有更改都将被删除。

分子脚本：

---
dependency:
  name: galaxy
lint:
  yamllint .
driver:
  name: docker
platforms:
  - name: instance
    image: ubuntu:bionic
    pre_build_image: true
provisioner:
  name: ansible
  log: true
  options:
    vvv: true
    diff: true
verifier:
  name: ansible
  converge_sequence:
    - create
    - converge
  idempotence_sequence:
    - create
    - converge

你能告诉我问题可能是什么（是的，我看到错误是在对口译员发誓）？