[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-08-29。"],[[["\u003cp\u003eCloud Composer exclusively supports Python 3, and the specific versions can be found in the Cloud Composer version list.\u003c/p\u003e\n"],["\u003cp\u003eOnce a Cloud Composer environment is set up, its Python minor version cannot be changed.\u003c/p\u003e\n"],["\u003cp\u003eCloud Composer version 1.19.0 deprecated Python 2 support, preventing the creation of new Python 2 environments or the upgrade of existing ones.\u003c/p\u003e\n"],["\u003cp\u003eStarting from version 1.19.6, operators that use Python 2, such as \u003ccode\u003ePythonVirtualenvOperator\u003c/code\u003e, are no longer functional.\u003c/p\u003e\n"],["\u003cp\u003eAlthough existing Python 2 environments are not directly affected, new Airflow components are developed only for Python 3, making migration to Python 3 highly recommended.\u003c/p\u003e\n"]]],[],null,["# Supported Python versions\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\nCloud Composer supports Python 3.\n\nTo see the `major.minor.patch` versions of Python 3 used in a\nspecific Cloud Composer image, see\n[Cloud Composer version list](/composer/docs/composer-versions).\n\nAfter an environment is created, you cannot switch an existing\nenvironment to a different minor Python version.\n\nPython 2 support in Cloud Composer 1\n------------------------------------\n\nSupport for Python 2 was deprecated in Cloud Composer\nversion 1.19.0:\n\n- Starting from version 1.19.0, it is not possible to create new environments\n with Python 2, or upgrade existing environments with Python 2 to 1.19.0\n and later versions of Cloud Composer.\n\n- Starting from version 1.19.6, it is no longer possible to use any operators\n that call Python 2. In particular, `PythonVirtualenvOperator` can no\n longer create virtual environments with Python 2.\n\n- Existing environments with Python 2 are not impacted by this change. It is\n possible to upgrade such environments to Cloud Composer version 1.18.12\n and earlier through gcloud CLI, API, and Terraform.\n\n- New Airflow operators, sensors, and hooks are only developed for\n Python 3, which may cause connectivity options to be outdated for Python 2\n environments. As such, we highly recommend migrating your DAGs to a\n Python 3 environment, and creating all new environments with Python 3.\n\n| **Note:** If you want to continue using Python 2, note that samples located in [python-docs-samples](https://github.com/GoogleCloudPlatform/python-docs-samples) are no longer checked for compatibility with Python 2.7.\n\nWhat's next\n-----------\n\n- [Creating environments](/composer/docs/composer-2/create-environments)\n- [Cloud Composer version list](/composer/docs/composer-versions)\n- [Release Notes](/composer/docs/release-notes)"]]
