django-typer

Use Typer to define the CLI for your Django management commands. Provides a TyperCommand class that inherits from BaseCommand and allows typer-style annotated parameter types. All of the BaseCommand functionality is preserved, so that TyperCommand can be a drop-in replacement.

django-typer makes it easy to:

• Define your command CLI interface in a clear, DRY, and safe way using type hints.
• Create subcommand and group command hierarchies.
• Use the full power of Typer's parameter types to validate and parse command line inputs.
• Create beautiful and information dense help outputs.
• Configure the rendering of exception stack traces using rich.
• Install shell tab-completion support for TyperCommands and normal Django commands for bash, zsh, fish, and powershell.
• Create custom and portable shell tab-completions for your CLI parameters.
• Refactor existing management commands into TyperCommands because TyperCommand is interface compatible with BaseCommand.

Please refer to the full documentation for more information.

Installation

1. Clone django-typer from GitHub or install a release off PyPI:

   pip install django-typer

   rich is a powerful library for rich text and beautiful formatting in the terminal. It is not required but highly recommended for the best experience:

   pip install "django-typer[rich]"

2. Add django_typer to your INSTALLED_APPS setting:

   INSTALLED_APPS = [
       ...
       'django_typer',
   ]

You only need to install django_typer as an app if you want to use the shell completion command to enable tab-completion or if you would like django-typer to install rich traceback rendering for you - which it does by default if rich is also installed.

Basic Example

For example, TyperCommands can be a very simple drop-in replacement for BaseCommands. All of the documented features of BaseCommand work!

from django_typer import TyperCommand

class Command(TyperCommand):
    def handle(self, arg1: str, arg2: str, arg3: float = 0.5, arg4: int = 1):
        """
        A basic command that uses Typer
        """

Multiple Subcommands Example

Commands with multiple subcommands can be defined:

   import typing as t

   from django.utils.translation import gettext_lazy as _
   from typer import Argument

   from django_typer import TyperCommand, command


   class Command(TyperCommand):
      """
      A command that defines subcommands.
      """

      @command()
      def create(
         self,
         name: t.Annotated[str, Argument(help=_("The name of the object to create."))],
      ):
         """
         Create an object.
         """

      @command()
      def delete(
         self, id: t.Annotated[int, Argument(help=_("The id of the object to delete."))]
      ):
         """
         Delete an object.
         """

Grouping and Hierarchies Example

More complex groups and subcommand hierarchies can be defined. For example, this command defines a group of commands called math, with subcommands divide and multiply. The group has a common initializer that optionally sets a float precision value. We would invoke this command like so:

./manage.py hierarchy math --precision 5 divide 10 2.1
./manage.py hierarchy math multiply 10 2

   import typing as t
   from functools import reduce

   from django.utils.translation import gettext_lazy as _
   from typer import Argument, Option

   from django_typer import TyperCommand, group


   class Command(TyperCommand):

      help = _("A more complex command that defines a hierarchy of subcommands.")

      precision = 2

      @group(help=_("Do some math at the given precision."))
      def math(
         self,
         precision: t.Annotated[
            int, Option(help=_("The number of decimal places to output."))
         ] = precision,
      ):
         self.precision = precision

      @math.command(help=_("Multiply the given numbers."))
      def multiply(
         self,
         numbers: t.Annotated[
            t.List[float], Argument(help=_("The numbers to multiply"))
         ],
      ):
         return f"{reduce(lambda x, y: x * y, [1, *numbers]):.{self.precision}f}"

      @math.command()
      def divide(
         self,
         numerator: t.Annotated[float, Argument(help=_("The numerator"))],
         denominator: t.Annotated[float, Argument(help=_("The denominator"))],
         floor: t.Annotated[bool, Option(help=_("Use floor division"))] = False,
      ):
         """
         Divide the given numbers.
         """
         if floor:
               return str(numerator // denominator)
         return f"{numerator / denominator:.{self.precision}f}"