Flags

A small no-requirements package for making bitwise flags in Python.

Installing

Available on PyPi:

pip install -U vf-flags

To install off of Github you can do the following

pip install -U git+https://github.com/Voxel-Fox-Ltd/Flags

Quick Example

Here's a basic example of creating a flags class using decorators.

import vfflags

class WebsitePermissions(vfflags.Flags):

    @vfflags.flag_value
    def view_posts(self):
        """If the user can view posts."""
        return 0b001

    @vfflags.flag_value
    def edit_posts(self):
        """If the user can edit posts."""
        return 0b010

    @vfflags.flag_value
    def delete_posts(self):
        return 0b100

Here's an alternative way to create a flags class using a class attribute.

import vfflags

class WebsitePermissions(vfflags.Flags):

    # You can optionally add a docstring by adding your value to a tuple
    CREATE_FLAGS = {
        "view_posts": (0b001, "If the user can view posts."),
        "edit_posts": (0b010, "If the user can edit posts."),
        "delete_posts": 0b100,
    }

Here's the usage of either of the above.

perms1 = WebsitePermissions(0b011)  # Init with a value
perms1.view_posts  # True
perms1.delete_posts  # False

perms2 = WebsitePermissions(delete_posts=True)  # Init with kwargs
perms2.view_posts  # False
perms2.delete_posts  # True