philiprehberger-enum-tools 0.1.4

Practical utilities for Python enums — lookup, validation, listing, and serialization

philiprehberger-enum-tools

Practical utilities for Python enums — lookup, validation, listing, and serialization.

Install

pip install philiprehberger-enum-tools

Usage

from enum import Enum, auto
from philiprehberger_enum_tools import lookup, choices, values, names, validate

class Color(Enum):
    RED = "red"
    GREEN = "green"
    BLUE = "blue"

Safe Lookup

lookup(Color, "red")        # Color.RED
lookup(Color, "yellow")     # None
lookup(Color, "yellow", default=Color.RED)  # Color.RED

Validation

validate(Color, "red")      # Color.RED
validate(Color, "yellow")   # ValueError: 'yellow' is not a valid Color value. Valid values: 'red', 'green', 'blue'

Listing

values(Color)    # ['red', 'green', 'blue']
names(Color)     # ['RED', 'GREEN', 'BLUE']
choices(Color)   # [('red', 'RED'), ('green', 'GREEN'), ('blue', 'BLUE')]

AutoEnum

Enum subclass where auto() generates lowercase member names as values.

from philiprehberger_enum_tools import AutoEnum
from enum import auto

class Status(AutoEnum):
    ACTIVE = auto()
    INACTIVE = auto()
    PENDING = auto()

Status.ACTIVE.value   # 'active'
Status.PENDING.value  # 'pending'

SerializableEnum

Enum that serializes to its value in JSON.

import json
from philiprehberger_enum_tools import SerializableEnum, SerializableEncoder

class Priority(SerializableEnum):
    LOW = 1
    MEDIUM = 2
    HIGH = 3

json.dumps({"priority": Priority.HIGH}, cls=SerializableEncoder)
# '{"priority": 3}'

API

Function / Class	Description
lookup(enum_class, value, *, default=None)	Safe value-to-member lookup, returns default if not found
choices(enum_class)	List of (value, name) tuples for forms and CLIs
values(enum_class)	List of all member values
names(enum_class)	List of all member names
validate(enum_class, value)	Lookup or raise ValueError with valid options
AutoEnum	Enum subclass where auto() generates lowercase name as value
SerializableEnum	Enum that serializes to its value via SerializableEncoder
SerializableEncoder	JSON encoder supporting SerializableEnum members

Development

pip install -e .
python -m pytest tests/ -v

License

MIT