irc.py 文件源码

def connectionMade(self):
        dst = path.abspath(path.join(self.destDir,self.filename))
        exists = path.exists(dst)
        if self.resume and exists:
            # I have been told I want to resume, and a file already
            # exists - Here we go
            self.file = open(dst, 'ab')
            log.msg("Attempting to resume %s - starting from %d bytes" %
                    (self.file, self.file.tell()))
        elif self.overwrite or not exists:
            self.file = open(dst, 'wb')
        else:
            raise OSError(errno.EEXIST,
                          "There's a file in the way.  "
                          "Perhaps that's why you cannot open it.",
                          dst)