Python · Enumerations & Flags

Why would you reach for Flag/IntFlag instead of a plain Enum when modelling a set of on/off options like file permissions?

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More in Enumerations & Flags

You model weekdays as plain ints (Monday = 1, ...). What real problems does this invite that an Enum prevents?

What does this print? ``` import enum class Day(enum.Enum): Mon = 1 print(Day.Mon == 1) ```

Given a plain Enum member, how do you get its display name versus its underlying stored value?

Two variables both hold Color.RED from the same Enum. Should you compare them with is or ==, and why does it matter?

What are the two ways to look up an Enum member from data — one from its stored value, one from its name string?

What does this print? ``` class Day(enum.Enum): Mon = 1 Tue = 2 Holiday = 1 for d in Day: print(d.name) ```

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