Python · Useful Modules & Recipes

You want to cut an image's contrast to half in Pillow. Which module, and what does the enhance factor mean?

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Your CLI prompts for a password with input(). A reviewer flags it as a security bug. Why, and what's the fix?

What's the difference in what gets shown on screen between getpass.getpass() and input() while the user types?

Which function returns the login name of the current OS user, without you parsing environment variables yourself?

What kind of object is a generator that uses value = (yield) rather than yield expr?

What does this print? ``` def printer(): while True: v = (yield) print(v) p = printer() p.send(87) ```

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