Centos 7上的yum更新错误，如何解决？

Question

尝试百胜更新时出现此错误：

Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Traceback (most recent call last):
  File "/usr/bin/yum", line 29, in <module>
    yummain.user_main(sys.argv[1:], exit_code=True)
  File "/usr/share/yum-cli/yummain.py", line 375, in user_main
    errcode = main(args)
  File "/usr/share/yum-cli/yummain.py", line 281, in main
    return_code = base.doTransaction()
  File "/usr/share/yum-cli/cli.py", line 817, in doTransaction
    resultobject = self.runTransaction(cb=cb)
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1852, in runTransaction
    self.skipped_packages, rpmdb_problems, cmdline)
  File "/usr/lib/python2.7/site-packages/yum/history.py", line 947, in beg
    pid   = self.pkg2pid(txmbr.po)
  File "/usr/lib/python2.7/site-packages/yum/history.py", line 804, in pkg2pid
    return self._ipkg2pid(po, create)
  File "/usr/lib/python2.7/site-packages/yum/history.py", line 798, in _ipkg2pid
    return self._pkgtup2pid(po.pkgtup, csum, create)
  File "/usr/lib/python2.7/site-packages/yum/history.py", line 781, in _pkgtup2pid
    checksum))
  File "/usr/lib/python2.7/site-packages/yum/sqlutils.py", line 168, in executeSQLQmark
    return cursor.execute(query, params)
sqlite3.ProgrammingError: You must not use 8-bit bytestrings unless you use a text_factory that can interpret 8-bit bytestrings (like text_factory = str). It is highly recommended that you instead just switch your application to Unicode strings.

如何解决？

我尝试： 百胜完成交易 百胜历史新 rm -rf / var / cache / yum 百胜清理所有 rm -f / var / lib / rpm / __ db *

谢谢前进