files.py 文件源码

def next_filehandle(self):
        """Go to the next file and retrun its filehandle or None (meaning no more files)."""
        filename = self.next_filename()
        if filename is None:
            fhandle = None
        elif filename == '-':
            fhandle = sys.stdin
        else:
            filename_extension = filename.split('.')[-1]
            if filename_extension == 'gz':
                myopen = gzip.open
            elif filename_extension == 'xz':
                myopen = lzma.open
            elif filename_extension == 'bz2':
                myopen = bz2.open
            else:
                myopen = open
            fhandle = myopen(filename, 'rt', encoding=self.encoding)
        self.filehandle = fhandle
        return fhandle