utils.py 文件源码

def __enter__(self):
        if self.compression == 'gzip':
            self.f = gzip.open(self.filename, 'rt' if self.read else 'wt')
        elif self.compression == 'bzip2':
            self.f = bz2.open(self.filename, 'rt' if self.read else 'wt')
        else:
            self.f = open(self.filename, 'r' if self.read else 'w')
        return self.f