fc5卸载yum3.0时，出错

panwill300

[root@localhost yum-3.0]# rpm -e yum
error: Failed dependencies:
        yum >= 2.5.3 is needed by (installed) pirut-1.0.1-1.noarch
[root@localhost yum-3.0]# yum -help
Traceback (most recent call last):
  File "/usr/bin/yum", line 28, in ?
    import yummain
  File "yummain.py", line 25, in ?
    from yum import logginglevels
ImportError: cannot import name logginglevels
怎样才能把yum3.0卸载掉？想重新安装下 ，

安装 是时直接，用 rpm -ivh yum-3.0.rpm，结果 出现问题，想 卸载后重新装