imports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 1.21 The mypy command line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 1.22 The pip install mypy Once mypy is installed, run it by using the mypy tool: $ mypy program.py This command makes mypy type check your program.py file and print out any errors it finds. Mypy will type check limited checking of dynamically typed functions by using the --check-untyped-defs flag. See The mypy command line for more information on configuring mypy. 4 Chapter 1. Contents Mypy Documentation, Release

Click is a Python package for creating beautiful command line interfaces in a composable way with as little code as neces- sary. It’s the “Command Line Interface Creation Kit”. It’s highly configurable configurable but comes with sensible defaults out of the box. It aims to make the process of writing command line tools quick and fun while also preventing any frustration caused by the inability to implement an runtime What does it look like? Here is an example of a simple Click program: import click @click.command() @click.option('--count', default=1, help='Number of greetings.') @click.option('--name', prompt='Your

Click is a Python package for creating beautiful command line interfaces in a composable way with as little code as neces- sary. It’s the “Command Line Interface Creation Kit”. It’s highly configurable configurable but comes with sensible defaults out of the box. It aims to make the process of writing command line tools quick and fun while also preventing any frustration caused by the inability to implement an runtime What does it look like? Here is an example of a simple click program: import click @click.command() @click.option('--count', default=1, help='Number of greetings.') @click.option('--name', prompt='Your

Click is a Python package for creating beautiful command line interfaces in a composable way with as little code as neces- sary. It’s the “Command Line Interface Creation Kit”. It’s highly configurable configurable but comes with sensible defaults out of the box. It aims to make the process of writing command line tools quick and fun while also preventing any frustration caused by the inability to implement an runtime What does it look like? Here is an example of a simple Click program: import click @click.command() @click.option('--count', default=1, help='Number of greetings.') @click.option('--name', prompt='Your

Click is a Python package for creating beautiful command line interfaces in a composable way with as little code as neces- sary. It’s the “Command Line Interface Creation Kit”. It’s highly configurable configurable but comes with sensible defaults out of the box. It aims to make the process of writing command line tools quick and fun while also preventing any frustration caused by the inability to implement an runtime What does it look like? Here is an example of a simple Click program: import click @click.command() @click.option('--count', default=1, help='Number of greetings.') @click.option('--name', prompt='Your

Click is a Python package for creating beautiful command line interfaces in a composable way with as little code as neces- sary. It’s the “Command Line Interface Creation Kit”. It’s highly configurable configurable but comes with sensible defaults out of the box. It aims to make the process of writing command line tools quick and fun while also preventing any frustration caused by the inability to implement an runtime What does it look like? Here is an example of a simple Click program: import click @click.command() @click.option('--count', default=1, help='Number of greetings.') @click.option('--name', prompt='Your

click is a Python package for creating beautiful command line interfaces in a composable way with as little amount of code as necessary. It’s the “Command Line Interface Creation Kit”. It’s highly configurable configurable but comes with good defaults out of the box. It aims at making writing command line tools fun and quick without causing user frustration at not being able to implement an intended CLI API. Click subcommands at runtime What does it look like? A simple example can be this: import click @click.command() @click.option('--count', default=1, help='Number of greetings.') @click.option('--name', prompt='Your

imports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 1.21 The mypy command line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 1.22 The pip install mypy Once mypy is installed, run it by using the mypy tool: $ mypy program.py This command makes mypy type check your program.py file and print out any errors it finds. Mypy will type check limited checking of dynamically typed functions by using the --check-untyped-defs flag. See The mypy command line for more information on configuring mypy. 4 Chapter 1. Contents Mypy Documentation, Release

modules How mypy handles imports Missing imports How imports are found Following imports The mypy command line Specifying what to type check Optional arguments Config file Import discovery Platform configuration pip install mypy Once mypy is installed, run it by using the mypy tool: $ mypy program.py This command makes mypy type check your program.py file and print out any errors it finds. Mypy will type check limited checking of dynamically typed functions by using the --check-untyped-defs flag. See The mypy command line for more information on configuring mypy. Strict mode and configuration Mypy has a strict mode

modules How mypy handles imports Missing imports How imports are found Following imports The mypy command line Specifying what to type check Optional arguments Config file Import discovery Platform configuration pip install mypy Once mypy is installed, run it by using the mypy tool: $ mypy program.py This command makes mypy type check your program.py file and print out any errors it finds. Mypy will type check limited checking of dynamically typed functions by using the --check-untyped-defs flag. See The mypy command line for more information on configuring mypy. Strict mode and configuration Mypy has a strict mode