ImportError: cannot import name 'ensure_text'

Apologies I don’t have a completely reproducible environment yet, but since virtualenv==20.0.0 was released 3 hours ago I wanted to get this reported as soon as I could as it likely could affect others.

I’m not 100% certain this is virtualenv’s fault, but I have previous builds that worked and the only major difference between them (and last week) was virtualenv being updated to a new major version.

If submitting a BUG please provide:

Operating System:

• ubuntu1804 Docker Image on gitlab-runner 12.3.0
• Python 3.6
• Running with a tox environment

$ apt-get update && apt-get install -y python3-pip python3-dev apt-rdepends libpq-dev libffi-dev && /usr/bin/python3 -m pip install tox && /usr/bin/python3 -m tox -e job
...
...
932 Collecting tox
933   Downloading https://files.pythonhosted.org/packages/77/a7/a5b721d9bf955edfe36013e5ecc9136fc6b2fef622ab1797ff0560273d8e/tox-3.14.3-py2.py3-none-any.whl (80kB)
934 Collecting virtualenv>=16.0.0 (from tox)
935   Downloading https://files.pythonhosted.org/packages/62/89/72ab7d18e001a23b25eb75ce71bbf9e2a3c142e2dad2e4e2b88012e4ca25/virtualenv-20.0.0-py2.py3-none-any.whl (4.6MB)
936 Collecting importlib-metadata<2,>=0.12; python_version < "3.8" (from tox)
937   Downloading https://files.pythonhosted.org/packages/8b/03/a00d504808808912751e64ccf414be53c29cad620e3de2421135fcae3025/importlib_metadata-1.5.0-py2.py3-none-any.whl
938 Requirement already satisfied: six<2,>=1.0.0 in /usr/lib/python3/dist-packages (from tox)
939 Collecting filelock<4,>=3.0.0 (from tox)
940   Downloading https://files.pythonhosted.org/packages/93/83/71a2ee6158bb9f39a90c0dea1637f81d5eef866e188e1971a1b1ab01a35a/filelock-3.0.12-py3-none-any.whl
941 Collecting toml>=0.9.4 (from tox)
942   Downloading https://files.pythonhosted.org/packages/a2/12/ced7105d2de62fa7c8fb5fce92cc4ce66b57c95fb875e9318dba7f8c5db0/toml-0.10.0-py2.py3-none-any.whl
943 Collecting packaging>=14 (from tox)
944   Downloading https://files.pythonhosted.org/packages/98/42/87c585dd3b113c775e65fd6b8d9d0a43abe1819c471d7af702d4e01e9b20/packaging-20.1-py2.py3-none-any.whl
945 Collecting py<2,>=1.4.17 (from tox)
946   Downloading https://files.pythonhosted.org/packages/99/8d/21e1767c009211a62a8e3067280bfce76e89c9f876180308515942304d2d/py-1.8.1-py2.py3-none-any.whl (83kB)
947 Collecting pluggy<1,>=0.12.0 (from tox)
948   Downloading https://files.pythonhosted.org/packages/a0/28/85c7aa31b80d150b772fbe4a229487bc6644da9ccb7e427dd8cc60cb8a62/pluggy-0.13.1-py2.py3-none-any.whl
949 Collecting importlib-resources<2,>=1.0; python_version < "3.7" (from virtualenv>=16.0.0->tox)
950   Downloading https://files.pythonhosted.org/packages/2f/f7/b4aa02cdd3ee7ebba375969d77c00826aa15c5db84247d23c89522dccbfa/importlib_resources-1.0.2-py2.py3-none-any.whl
951 Collecting appdirs<2,>=1.4.3 (from virtualenv>=16.0.0->tox)
952   Downloading https://files.pythonhosted.org/packages/56/eb/810e700ed1349edde4cbdc1b2a21e28cdf115f9faf263f6bbf8447c1abf3/appdirs-1.4.3-py2.py3-none-any.whl
953 Collecting zipp>=0.5 (from importlib-metadata<2,>=0.12; python_version < "3.8"->tox)
954   Downloading https://files.pythonhosted.org/packages/46/42/f2dd964b2a6b1921b08d661138148c1bcd3f038462a44019416f2342b618/zipp-2.2.0-py36-none-any.whl
955 Collecting pyparsing>=2.0.2 (from packaging>=14->tox)
956   Downloading https://files.pythonhosted.org/packages/5d/bc/1e58593167fade7b544bfe9502a26dc860940a79ab306e651e7f13be68c2/pyparsing-2.4.6-py2.py3-none-any.whl (67kB)
957 Installing collected packages: zipp, importlib-metadata, importlib-resources, appdirs, filelock, virtualenv, toml, pyparsing, packaging, py, pluggy, tox
958 Successfully installed appdirs-1.4.3 filelock-3.0.12 importlib-metadata-1.5.0 importlib-resources-1.0.2 packaging-20.1 pluggy-0.13.1 py-1.8.1 pyparsing-2.4.6 toml-0.10.0 tox-3.14.3 virtualenv-20.0.0 zipp-2.2.0
959 job create: /builds/.tox/job
960 ERROR: invocation failed (exit code 1), logfile: /builds/.tox/job/log/job-0.log
961 ================================== log start ===================================
962 ERROR:root:ImportError: cannot import name 'ensure_text'

[asottile]

One fix would be to not depend on ensure_text here – almost all of the cases should use six.text_type(...) anyway

[ssbarnea]

Can we please reopen this bug? The reality is that is perfectly possible to end-up with a newer virtualenv with a six version that is too old.

Here is an example: https://logserver.rdoproject.org/16/24916/5/check/check-centos-8/595187c/job-output.txt