如何在Python日志中打印源代码行

Question

有没有什么比较简单的方法，可以让我们在Python的日志报告中自动加入源代码的行？比如说……

import logging

def main():
    something_is_not_right = True
    logging.basicConfig(level=logging.DEBUG,
                        format=('%(filename)s: '    
                                '%(levelname)s: '
                                '%(funcName)s(): '
                                '%(lineno)d:\t'
                                '%(message)s')
                        )

    if something_is_not_right == True:
        logging.debug('some way to get previous line of source code here?')

这样输出的结果就会像这样。

example.py: DEBUG: main(): 14:       if something_is_not_right == True:

Answer 1

因为我看到unutbu尝试过类似的东西，所以我写了这段代码（现在发帖已经太晚了）：

import logging, sys

# From logging.py
def currentframe():
    """Return the frame object for the caller's stack frame."""
    try:
        raise Exception
    except:
        return sys.exc_traceback

f = open(__file__.rstrip('c'))
owncode = f.readlines()
f.close()

def main():
    something_is_not_right = True
    logging.basicConfig(level=logging.DEBUG,
                        format=('%(filename)s: '
                                '%(levelname)s: '
                                '%(funcName)s(): '
                                '%(lineno)d:\t'
                                '%(message)s')
                        )

    if something_is_not_right == True:
        prev = owncode[currentframe().tb_frame.f_back.f_lineno - 2]
        logging.debug('previous line of source code here:\n%s' % prev)

if __name__ == '__main__':
    main()

Answer 2

import inspect
import logging
import linecache

def main():
    something_is_not_right = True
    logging.basicConfig(level=logging.DEBUG,
                        format=('%(filename)s: '    
                                '%(levelname)s: '
                                '%(funcName)s(): '
                                '%(lineno)d:\t'
                                '%(message)s')
                        )

    if something_is_not_right:
        logging.debug(linecache.getline(
            __file__,
            inspect.getlineno(inspect.currentframe())-1))

if __name__=='__main__':
    main()

test.py: DEBUG: main(): 18:     if something_is_not_right == True:

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