brettcannon’s gists

brettcannon / py.py

Created November 20, 2025 18:19

Python Launcher for Unix rewrite in pure Python PoC

	import os
	import sys


	def activated_venv():
	"""Check if a virtual environment is activated."""
	if "VIRTUAL_ENV" not in os.environ:
	return None

	os.path.join(os.environ["VIRTUAL_ENV"], "bin", "python")

brettcannon / pdm.lock

Last active September 10, 2024 22:07

Lock files with groups

	# This file is @generated by PDM.
	# It is not intended for manual editing.

	[metadata]
	groups = ["default", "dev1", "dev2"]
	strategy = ["inherit_metadata"]
	lock_version = "4.5.0"
	content_hash = "sha256:6e2057cd4fe2aa34574cd5b65f833983a72f632225c08fdfe1e16f8c656d80a7"

	[[metadata.targets]]

brettcannon / pdm.lock

Last active September 6, 2024 22:10

Lock files with extras

	# This file is @generated by PDM.
	# It is not intended for manual editing.

	[metadata]
	groups = ["default", "extra-A", "extra-B"]
	strategy = ["inherit_metadata"]
	lock_version = "4.5.0"
	content_hash = "sha256:0c137fae99f4123508584ab1444667a46e13237f440c0577bb8d633ee82eaf47"

	[[metadata.targets]]

brettcannon / pdm.lock

Created September 3, 2024 23:49

Lock file comparison

	# This file is @generated by PDM.
	# It is not intended for manual editing.

	[metadata]
	groups = ["default"]
	strategy = ["inherit_metadata"]
	lock_version = "4.5.0"
	content_hash = "sha256:ad8d737d864c796dd999f825b17b9226e856eca6f3e7b8c2c654917eec423d19"

	[[metadata.targets]]

brettcannon / fluent.py

Created December 4, 2023 22:54

Provide a function that lets you use a fluent-style API when a method returns e.g. `None` instead of `self`

	def fluent(bound_method, /, args, *kwargs):
	"""Call a bound method and return `self` from that method."""
	bound_method(args, *kwargs)
	return bound_method.__self__

brettcannon / metadata.py

Last active October 18, 2022 03:13

`RawMetadata` with caching functions to access normalized values

	import functools
	from typing import Any, Callable, Dict, Iterable, List, Optional, TypeVar

	from .requirements import Requirement
	from .specifiers import SpecifierSet
	from .utils import NormalizedName, canonicalize_name
	from .version import Version


	_T = TypeVar("_T")

brettcannon / metadata.py

Created October 16, 2022 18:00

`packaging.metadata` with lazy data validation

	import pathlib
	from typing import Any, Dict, Iterable, List, Optional, Tuple, Union

	from .requirements import Requirement
	from .specifiers import SpecifierSet
	from .utils import NormalizedName, canonicalize_name
	from .version import Version


	class Metadata:

brettcannon / back-in-my-day.py

Created November 26, 2021 22:31

Make Jeff feel better about Python packaging

	"""Back in my day, we only needed one command. 🧓"""

	import runpy
	import sys


	def run(command):
	sys.argv[0] = command
	runpy.run_module(command, run_name="__main__")

brettcannon / config.site

Last active February 2, 2022 22:49

WASI-SDK w/ CPython

brettcannon / stdlib_modules.json

Created February 20, 2021 23:41

Stdlib modules

Brett Cannon brettcannon