[Tutor] what is foo bar?

[Walter Hanagriff]

greetings to all yet again:

the words foo and bar are used so much in examples, why? 
there is even this example: 'from foo import *'
does this do something, i got it from an example of 
importing a package, and the comment on it
was that it was poor style, does foo and bar, or just foo or 
bar actually do something
or just useful as example names of variables, modules and 
such?

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