Logger.py 文件源码

def monkeypatch_findCaller():
            if __file__.lower()[-4:] in ['.pyc', '.pyo']:
                _wrapper_srcfile = __file__.lower()[:-4] + '.py'
            else:
                _wrapper_srcfile = __file__
            _wrapper_srcfile = normcase(_wrapper_srcfile)

            def findCaller(self, stack_info=False):
                """
                Find the stack frame of the caller so that we can note the source
                file name, line number and function name.
                """
                f = currentframe()
                #On some versions of IronPython, currentframe() returns None if
                #IronPython isn't run with -X:Frames.
                if f is not None:
                    f = f.f_back
                rv = "(unknown file)", 0, "(unknown function)", None
                while hasattr(f, "f_code"):
                    co = f.f_code
                    filename = normcase(co.co_filename)
                    if filename == _wrapper_srcfile or filename == logging._srcfile:
                        f = f.f_back
                        continue
                    sinfo = None
                    if stack_info:
                        sio = io.StringIO()
                        sio.write('Stack (most recent call last):\n')
                        traceback.print_stack(f, file=sio)
                        sinfo = sio.getvalue()
                        if sinfo[-1] == '\n':
                            sinfo = sinfo[:-1]
                        sio.close()
                    rv = (co.co_filename, f.f_lineno, co.co_name, sinfo)
                    break
                return rv

            logging.Logger.findCaller = findCaller