{"library":"nest-asyncio2","title":"nest-asyncio2","description":"nest-asyncio2 is a fork of the unmaintained `nest_asyncio` library, designed to patch `asyncio` to allow nested event loops. It addresses compatibility issues with Python 3.12+ and 3.14+ where the original library would fail. The current version is 1.7.2, and it receives updates as needed to maintain compatibility with newer Python versions and fix issues.","language":"python","status":"active","last_verified":"Fri May 15","install":{"commands":["pip install nest-asyncio2"],"cli":null},"imports":["import nest_asyncio2\nnest_asyncio2.apply()"],"auth":{"required":false,"env_vars":[]},"quickstart":{"code":"import asyncio\nimport nest_asyncio2\n\nasync def inner_coroutine():\n    print(\"Inner coroutine running.\")\n    await asyncio.sleep(0.01)\n    print(\"Inner coroutine finished.\")\n\nasync def outer_coroutine():\n    print(\"Outer coroutine starting inner loop.\")\n    # This would normally fail with RuntimeError: This event loop is already running\n    # but nest_asyncio2 allows it.\n    await asyncio.run(inner_coroutine())\n    print(\"Outer coroutine finished inner loop.\")\n\n# Apply the patch to allow nested event loops\nnest_asyncio2.apply()\n\n# Run the outer coroutine, which itself runs an inner event loop\nprint(\"Running outer event loop.\")\nasyncio.run(outer_coroutine())\nprint(\"Program finished.\")","lang":"python","description":"This example demonstrates how to use `nest_asyncio2.apply()` to enable nested `asyncio.run()` calls. Without the patch, the inner `asyncio.run()` call would raise a `RuntimeError` because an event loop is already running.","tag":null,"tag_description":null,"last_tested":null,"results":[]},"compatibility":{"tag":null,"tag_description":null,"last_tested":"2026-05-15","installed_version":"1.7.2","pypi_latest":"1.7.2","is_stale":false,"summary":{"python_range":"3.10–3.9","success_rate":100,"avg_install_s":1.6,"avg_import_s":0.19,"wheel_type":"wheel"},"results":[{"runtime":"python:3.10-alpine","python_version":"3.10","os_libc":"alpine (musl)","variant":"nest-asyncio2","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"clean","install_time_s":null,"import_time_s":0.08,"mem_mb":4,"disk_size":"17.8M"},{"runtime":"python:3.10-slim","python_version":"3.10","os_libc":"slim (glibc)","variant":"nest-asyncio2","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"clean","install_time_s":1.5,"import_time_s":0.06,"mem_mb":4,"disk_size":"18M"},{"runtime":"python:3.11-alpine","python_version":"3.11","os_libc":"alpine (musl)","variant":"nest-asyncio2","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"clean","install_time_s":null,"import_time_s":0.15,"mem_mb":4.9,"disk_size":"19.6M"},{"runtime":"python:3.11-slim","python_version":"3.11","os_libc":"slim (glibc)","variant":"nest-asyncio2","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"clean","install_time_s":1.6,"import_time_s":0.13,"mem_mb":4.9,"disk_size":"20M"},{"runtime":"python:3.12-alpine","python_version":"3.12","os_libc":"alpine (musl)","variant":"nest-asyncio2","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"clean","install_time_s":null,"import_time_s":0.35,"mem_mb":8.2,"disk_size":"11.5M"},{"runtime":"python:3.12-slim","python_version":"3.12","os_libc":"slim (glibc)","variant":"nest-asyncio2","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"clean","install_time_s":1.5,"import_time_s":0.35,"mem_mb":8.2,"disk_size":"12M"},{"runtime":"python:3.13-alpine","python_version":"3.13","os_libc":"alpine (musl)","variant":"nest-asyncio2","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"clean","install_time_s":null,"import_time_s":0.35,"mem_mb":8.7,"disk_size":"11.3M"},{"runtime":"python:3.13-slim","python_version":"3.13","os_libc":"slim (glibc)","variant":"nest-asyncio2","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"clean","install_time_s":1.4,"import_time_s":0.32,"mem_mb":8.7,"disk_size":"12M"},{"runtime":"python:3.9-alpine","python_version":"3.9","os_libc":"alpine (musl)","variant":"nest-asyncio2","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"clean","install_time_s":null,"import_time_s":0.07,"mem_mb":3.9,"disk_size":"17.3M"},{"runtime":"python:3.9-slim","python_version":"3.9","os_libc":"slim (glibc)","variant":"nest-asyncio2","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"clean","install_time_s":1.8,"import_time_s":0.07,"mem_mb":3.9,"disk_size":"18M"}]}}