when I use yum in the shell, the error message is not a module named yum, so I edit / usr / bin / yum, changing the first line to a different version of python, but nothing changes, and when I use another python to import yum, it causes a different error 

and when I use yum, the message looks like this:
yum is fine before using "rpm -e -nodeps pycurl" to remove pycurl ... I need help :(
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