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The simplest way to create bit-flags

Project description

intflags

Simplest way to create bit-flags.

$ pip install intflags

Usage

Create any number of intflags by using intflags.get(). You can create a union of any amount using the pipe (|) operator.

>>> import intflags

>>> a, b, c = intflags.get(3)
>>> bin(a | b | c)
'0b111'

>>> flags = a | b
>>> a in flags
True
>>> c in flags
False

Flags can be subtracted.

# ...
>>> new_flags = flags - b
>>> b in new_flags
False
>>> new_flags == a
True

You could use classes as a pseudo-namespace.

>>> class RegexFlags:
...     I, L, M, S, U, X = intflags.get(6)

Flags share an internal "namespace" ID to prevent accidental conflicts between sets. This allows multiple sets of flags to exist within the same class or module, without risk of accidentally creating a union between them.

>>> x = intflags.get(1)
>>> y = intflags.get(1)
>>> x | y
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  ...
ValueError: Flags must share a namespace to create a union.

License

IntFlags is licensed under the ISC license. A copy of the license is included in the root of this repository and in the source of the module.

Project details


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