open read and close a file in 1 line of code

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You don’t really have to close it – Python will do it automatically either during garbage collection or at program exit. But as @delnan noted, it’s better practice to explicitly close it for various reasons.

So, what you can do to keep it short, simple and explicit:

with open('pagehead.section.htm', 'r') as f:
    output = f.read()

Now it’s just two lines and pretty readable, I think.

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