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Python - ログ

Posted at

configparser

import configparser

config = configparser.ConfigParser()
config["DEFAULT"] = {
    "debug": True
}
config["web_server"] = {
    "host": "127.0.0.1",
    "port": 80
}
config["db_server"] = {
    "host": "127.0.0.1",
    "port": 3306
}

with open("config.ini", "w") as config_file:
    config.write(config_file)
import configparser

config = configparser.ConfigParser()
config.read("config.ini")
config["web_server"]["host"]

yaml

import yaml

with open("config,yml", "w") as yaml_file:
    yaml.dump({
        "web_server": {
            "host": "127.0.0.1",
            "port": 80
        },
        "db_server": {
            "host": "127.0.0.1",
            "port": 3306
        }
    }, yaml_file, default_flow_style=False)
import yaml

with open("config,yml", "r") as yaml_file:
    data = yaml.load(yaml_file, Loader=yaml.Loader)
    data["web_server"]["host"]

logging

ロギング

import logging

# INFO 以上のログを出力(デフォルトでは、WARNING 以上のログを出力する。)
logging.basicConfig(filename="test.log", level=logging.INFO)

logging.critical("critical")
logging.error("error")
logging.warning("warning")
logging.info("info {}".format("test"))
logging.debug("debug")

フォーマッタ

import logging

# フォーマッタでメッセージをカスタマイズする。
formatter = '%(asctime)s:%(levelname)s'
logging.basicConfig(level=logging.INFO, format=formatter)

logging.critical("critical")
logging.error("error")
logging.warning("warning")
logging.info("info")
logging.debug("debug")

ロガー

import logging

logging.basicConfig(level=logging.INFO)

logging.info("info")

# ログレベルを、DEBUG に変える。
logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)
logger.debug("debug")

ハンドラー

import logging

logger = logging.getLogger(__name__)
logger.setLevel(logging.INFO)

# logger をファイルに書き込む
h = logging.FileHandler("test.log")
logger.addHandler(h)

logging.info("from logging info")
logger.info("from logger info")

フィルタ

import logging

logging.basicConfig(level=logging.INFO)

# pass が含まれている場合は、ログに出力しない。
class NoPassFilter(logging.Filter):
    def filter(self, record):
        log_message = record.getMessage()
        return 'pass' not in log_message


logger = logging.getLogger(__name__)
logger.addFilter(NoPassFilter())
logger.info('from main')
logger.info('from main pass = "test"')

ロギング コンフィグ

import logging.config


# ロギング コンフィグから読み込む。
logging.config.fileConfig('logging.ini')
logger = logging.getLogger(__name__)

logger.debug('debug message')
logger.info('info message')
logger.warning('warning message')
logger.error('error message')
logger.critical('critical message')
logging.ini
[loggers]
keys=root,simpleExample

[handlers]
keys=consoleHandler

[formatters]
keys=simpleFormatter

[logger_root]
level=WARNING
handlers=consoleHandler

[logger_simpleExample]
level=DEBUG
handlers=consoleHandler
qualname=simpleExample
propagate=0

[handler_consoleHandler]
class=StreamHandler
level=DEBUG
formatter=simpleFormatter
args=(sys.stdout,)

[formatter_simpleFormatter]
format=%(asctime)s - %(name)s - %(levelname)s - %(message)s

email

virtualenv

# virtualenv をインストール
pip install virtualenv

# virtualenv を作成
virtualenv my_python_env

# 作成した virtualenv を利用。
source my_python_env/bin/activate

# 利用している環境を確認
which python
/Users/XXX/PycharmProjects/my_python_env/bin/python

# 元の環境に戻る
deactivate
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