Over the time I've worked in system administration, I've observed acommon pattern that I will summarize this way:

As your system count grows, you wind up automating the automation.

Here is the levels that I've seen people (myself included) go through:

• managing systems by hand, one by one.
• using tools that let you run a command on all of your systems orclasses of your systems.
• automating things for clusters, so that you don't have to explicitlyrun commands on

As a trap for the unwary, Python code objects have both a co_names and a co_varnames attribute. Since I just confused myself aboutwhich was what the other day , here is what the co_names one is.

Put simply, co_names is a tuple of names of globals and attributesthat are used by the function's code. For example, if you have ' a =self.bar() ' in the function, the ' bar ' will show up in co_