{"library":"python-json-logger","title":"Python JSON Logger","description":"A JSON log formatter for the Python logging package that supports various JSON encoders. Current version is 4.0.0, with regular releases typically made every few months.","language":"python","status":"active","last_verified":"Tue May 19","install":{"commands":["pip install python-json-logger"],"cli":null},"imports":["from pythonjsonlogger.jsonlogger import JsonFormatter"],"auth":{"required":false,"env_vars":[]},"quickstart":{"code":"import logging\nfrom pythonjsonlogger.jsonlogger import JsonFormatter\n\nlogger = logging.getLogger('my_logger')\nhandler = logging.StreamHandler()\nformatter = JsonFormatter()\nhandler.setFormatter(formatter)\nlogger.addHandler(handler)\nlogger.setLevel(logging.INFO)\nlogger.info('This is a log message with JSON formatting')","lang":"python","description":"Basic usage of JsonFormatter to log messages in JSON format.","tag":"verified","tag_description":"quickstart runs on critical runtimes, recently tested","last_tested":"2026-04-23","results":[{"runtime":"python:3.10-alpine","exit_code":0},{"runtime":"python:3.10-slim","exit_code":0},{"runtime":"python:3.11-alpine","exit_code":0},{"runtime":"python:3.11-slim","exit_code":0},{"runtime":"python:3.12-alpine","exit_code":0},{"runtime":"python:3.12-slim","exit_code":0},{"runtime":"python:3.13-alpine","exit_code":0},{"runtime":"python:3.13-slim","exit_code":0},{"runtime":"python:3.9-alpine","exit_code":0},{"runtime":"python:3.9-slim","exit_code":0}]},"compatibility":{"tag":"verified","tag_description":"installs cleanly on critical runtimes, fast import, recently tested","last_tested":"2026-05-19","installed_version":"4.0.0","pypi_latest":"4.1.0","is_stale":true,"summary":{"python_range":"3.10–3.9","success_rate":100,"avg_install_s":1.5,"avg_import_s":0.08,"wheel_type":"wheel"},"results":[{"runtime":"python:3.10-alpine","python_version":"3.10","os_libc":"alpine (musl)","variant":"python-json-logger","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"noisy","install_time_s":null,"import_time_s":0.06,"mem_mb":2.6,"disk_size":"17.9M"},{"runtime":"python:3.10-alpine","python_version":"3.10","os_libc":"alpine (musl)","variant":"python-json-logger","exit_code":0,"wheel_type":null,"failure_reason":null,"import_side_effects":null,"install_time_s":null,"import_time_s":0.07,"mem_mb":2.6,"disk_size":"17.9M"},{"runtime":"python:3.10-slim","python_version":"3.10","os_libc":"slim (glibc)","variant":"python-json-logger","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"noisy","install_time_s":1.5,"import_time_s":0.04,"mem_mb":2.6,"disk_size":"18M"},{"runtime":"python:3.10-slim","python_version":"3.10","os_libc":"slim (glibc)","variant":"python-json-logger","exit_code":0,"wheel_type":null,"failure_reason":null,"import_side_effects":null,"install_time_s":null,"import_time_s":0.04,"mem_mb":2.6,"disk_size":"18M"},{"runtime":"python:3.11-alpine","python_version":"3.11","os_libc":"alpine (musl)","variant":"python-json-logger","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"noisy","install_time_s":null,"import_time_s":0.1,"mem_mb":2.8,"disk_size":"19.7M"},{"runtime":"python:3.11-alpine","python_version":"3.11","os_libc":"alpine (musl)","variant":"python-json-logger","exit_code":0,"wheel_type":null,"failure_reason":null,"import_side_effects":null,"install_time_s":null,"import_time_s":0.11,"mem_mb":2.8,"disk_size":"19.7M"},{"runtime":"python:3.11-slim","python_version":"3.11","os_libc":"slim (glibc)","variant":"python-json-logger","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"noisy","install_time_s":1.6,"import_time_s":0.09,"mem_mb":2.8,"disk_size":"20M"},{"runtime":"python:3.11-slim","python_version":"3.11","os_libc":"slim (glibc)","variant":"python-json-logger","exit_code":0,"wheel_type":null,"failure_reason":null,"import_side_effects":null,"install_time_s":null,"import_time_s":0.1,"mem_mb":2.8,"disk_size":"20M"},{"runtime":"python:3.12-alpine","python_version":"3.12","os_libc":"alpine (musl)","variant":"python-json-logger","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"noisy","install_time_s":null,"import_time_s":0.08,"mem_mb":2.7,"disk_size":"11.6M"},{"runtime":"python:3.12-alpine","python_version":"3.12","os_libc":"alpine (musl)","variant":"python-json-logger","exit_code":0,"wheel_type":null,"failure_reason":null,"import_side_effects":null,"install_time_s":null,"import_time_s":0.09,"mem_mb":2.7,"disk_size":"11.6M"},{"runtime":"python:3.12-slim","python_version":"3.12","os_libc":"slim (glibc)","variant":"python-json-logger","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"noisy","install_time_s":1.4,"import_time_s":0.09,"mem_mb":2.7,"disk_size":"12M"},{"runtime":"python:3.12-slim","python_version":"3.12","os_libc":"slim (glibc)","variant":"python-json-logger","exit_code":0,"wheel_type":null,"failure_reason":null,"import_side_effects":null,"install_time_s":null,"import_time_s":0.09,"mem_mb":2.7,"disk_size":"12M"},{"runtime":"python:3.13-alpine","python_version":"3.13","os_libc":"alpine (musl)","variant":"python-json-logger","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"noisy","install_time_s":null,"import_time_s":0.07,"mem_mb":2.9,"disk_size":"11.3M"},{"runtime":"python:3.13-alpine","python_version":"3.13","os_libc":"alpine (musl)","variant":"python-json-logger","exit_code":0,"wheel_type":null,"failure_reason":null,"import_side_effects":null,"install_time_s":null,"import_time_s":0.08,"mem_mb":2.9,"disk_size":"11.2M"},{"runtime":"python:3.13-slim","python_version":"3.13","os_libc":"slim (glibc)","variant":"python-json-logger","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"noisy","install_time_s":1.4,"import_time_s":0.08,"mem_mb":2.7,"disk_size":"12M"},{"runtime":"python:3.13-slim","python_version":"3.13","os_libc":"slim (glibc)","variant":"python-json-logger","exit_code":0,"wheel_type":null,"failure_reason":null,"import_side_effects":null,"install_time_s":null,"import_time_s":0.11,"mem_mb":2.7,"disk_size":"12M"},{"runtime":"python:3.9-alpine","python_version":"3.9","os_libc":"alpine (musl)","variant":"python-json-logger","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"noisy","install_time_s":null,"import_time_s":0.06,"mem_mb":3,"disk_size":"17.7M"},{"runtime":"python:3.9-alpine","python_version":"3.9","os_libc":"alpine (musl)","variant":"python-json-logger","exit_code":0,"wheel_type":null,"failure_reason":null,"import_side_effects":null,"install_time_s":null,"import_time_s":0.07,"mem_mb":3,"disk_size":"17.7M"},{"runtime":"python:3.9-slim","python_version":"3.9","os_libc":"slim (glibc)","variant":"python-json-logger","exit_code":0,"wheel_type":"wheel","failure_reason":null,"import_side_effects":"noisy","install_time_s":1.8,"import_time_s":0.06,"mem_mb":3,"disk_size":"18M"},{"runtime":"python:3.9-slim","python_version":"3.9","os_libc":"slim (glibc)","variant":"python-json-logger","exit_code":0,"wheel_type":null,"failure_reason":null,"import_side_effects":null,"install_time_s":null,"import_time_s":0.06,"mem_mb":3,"disk_size":"18M"}]}}