how can I send several command by useing pexpect ssh

[haishan chang]

I have studied pexpect example "sshls.py" and "ssh_session.py", trying to
carry several linux command by ssh. for example.
1. ssh connect one remotehost,
2. cd  /tmp directory
3. mkdir myname
4. touch  output.log

But I found these examples only can carry one command.who knows how to carry
sereval linux command continuely.
Background: I have hundreds computers, and try to control all computers at
one time.
thank you very much.
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