我在处理一个问题，需要从命令行运行具有不同参数的代码。我在网上找到了这个示例，但却找不到答案。我目前不在乎解析器错误，稍后我会处理，我只是对获得正确的参数感到困惑。 -l/--level INFO 是 设置日志级别为 DEBUG、INFO、WARNING、ERROR 和 CRITICAL -n/--name 如果为空则引发解析器错误 是 设置 Address 对象的 name 值 -a/--address 如果为空则引发解析器错误 是 设置 Address 对象的 street_address 值 -c/--city 如果为空则引发解析器错误 是 设置 Address 对象的 city 值 -s/--state 如果为空则引发解析器错误 是 设置 Address 对象的 state 值 -z/--zip_code 如果为空则引发解析器错误 是 设置 Address 对象的 zip_code 值
如果您使用以下命令行参数运行代码：
property_address.py -n Tom -a "my street" -c "San Diego" -s "CA" -z 21045
...您应该在 property_address.log 中看到类似以下内容：
2010-10-11 14:48:59,794 - INFO - init - Creating a new address
以下是我的代码：
import re
import logging
LOG_FILENAME = "property_address.log"
LOG_FORMAT = "%(asctime)s-%(levelname)s-%(funcName)s-%(message)s"
DEFAULT_LOG_LEVEL = "error" # Default log level
LEVELS = {'debug': logging.DEBUG,
'info': logging.INFO,
'warning': logging.WARNING,
'error': logging.ERROR,
'critical': logging.CRITICAL
}
def start_logging(filename=LOG_FILENAME, level=DEFAULT_LOG_LEVEL):
"Start logging with given filename and level."
logging.basicConfig(filename=filename, level=LEVELS[level],format=LOG_FORMAT)
# log a message
logging.info('Starting up the property_address program')
class StateError(Exception): pass
class ZipCodeError(Exception):pass
class Address(object):
states = ['IA', 'KS', 'UT', 'VA', 'NC', 'NE', 'SD', 'AL', 'ID', 'FM', 'DE', 'AK', 'CT', 'PR', 'NM', 'MS', 'PW', 'CO', 'NJ', 'FL', 'MN',
'VI', 'NV', 'AZ', 'WI', 'ND', 'PA', 'OK', 'KY', 'RI', 'NH', 'MO', 'ME', 'VT', 'GA', 'GU', 'AS', 'NY', 'CA', 'HI', 'IL', 'TN',
'MA', 'OH', 'MD', 'MI', 'WY', 'WA', 'OR', 'MH', 'SC', 'IN', 'LA', 'MP', 'DC', 'MT', 'AR', 'WV', 'TX']
def __init__(self,name, street_address, city, state, zip_code):
self._name = name
logging.info('Creating a new name')
self._street_address = street_address
logging.info('Creating a new address')
self._city = city
logging.info('Creating a new city')
self._state = state
logging.info('Creating a new state')
self._zip_code = zip_code
logging.info('Creating a new zip_code')
@property
def name(self):
return self._name.title()
@property
def state(self):
return self._state
@state.setter
def state(self,value):
if value not in self.states:
logging.error('STATE exception')
raise StateError(value)
self._state = value
logging.info('Creating a new state')
@property
def zip_code(self):
return self._zip_code
@zip_code.setter
def zip_code(self,value):
if re.match(r"^\d\d\d\d\d$",value):
self._zip_code = value
logging.info('Creating a new ZipCode')
else:
logging.error('ZIPCODE exception')
raise ZipCodeError
I am having trouble with setting up the args. I am currently trying:
if __name__ == '__main__':
parser = OptionParser()
parser.add_option('-l', '--level', dest="level", action="store",
help="sets level")
(options, args) = parser.parse_args()
How can I set the log level to warning this if I run "-l warning" from the command line, and then run the script. I also need to call -n Tom etc. I don't need the answer to ever arg, just a general understanding of how this would work. I am alos not worried about the parse errors now, just being able to get the args right.
2、解决方案
答案1：
从 options.level 获取 level 选项值并将其传递给 start_logging()：
```python
if __name__ == '__main__':
parser = OptionParser()
parser.add_option('-l', '--level', dest="level", action="store",
help="sets level")
(options, args) = parser.parse_args()
start_logging(level=options.level)
logging.error('ERROR!')
logging.info('INFO')
使用 -l warning 运行脚本后，只有 ERROR! 消息被写入日志文件。
如果使用 -l info 运行，您将在日志文件中同时看到 ERROR! 和 INFO! 消息。
希望有所帮助。
