Python的日誌記錄配置：輸出跟蹤到文件，輸出日誌消息到控制檯

Question

鑑於以下記錄聲明：

import logging 

... 
def ... 
    try: 
     ... 
    except MyException: 
     ... 
     logger.error("Parsing Error: %s"%(sys.exc_info()[0]),exc_info=True) 

而下面的JSON配置：

"handlers":{ 
    "error_file_handler": { 
     "class": "logging.handlers.RotatingFileHandler", 
     "level": "ERROR", 
     "formatter": "simple", 
     "filename": "../log/errors.log", 
     "maxBytes": 10485760, 
     "backupCount": 20, 
     "encoding": "utf8" 
    }, 
} 

"loggers": { 
    "my_module": { 
     "level": "ERROR", 
     "handlers": ["console"], 
     "propagate": "no" 
    } 
}, 

如何修改這個配置，跟蹤輸出不會輸出到控制檯，而是輸出到錯誤日誌？

而且，在同一時間：日誌消息字符串仍輸出到控制檯？

Answer 1

試試這個：

"handlers": { 
    "error_file_handler": { 
     "class": "logging.handlers.RotatingFileHandler", 
     "level": "ERROR", 
     "formatter": "simple", 
     "filename": "../log/errors.log", 
     "maxBytes": 10485760, 
     "backupCount": 20, 
     "encoding": "utf8" 
    }, 
    'console': { 
     'level': 'INFO', 
     'formatter': 'standard', 
     'class': 'logging.StreamHandler' 
    } 
} 

"loggers": { 
    "my_module": { 
     "level": "ERROR", 
     "handlers": ["console", "error_file_handler"], 
     "propagate": "no" 
    } 
} 

變化：

1. "handlers": ["console", "error_file_handler"]：寫入日誌既文件和控制檯
2. "handlers": ["error_file_handler"]：寫日誌記錄文件
3. 等