KaoruNishikawa’s gists

KaoruNishikawa / download_mnist.py

Last active September 9, 2025 07:46

Download MNIST dataset without Scikit-learn, PyTorch, nor TensorFlow

	import gzip
	import urllib.request
	from pathlib import Path
	from types import SimpleNamespace
	from typing import Literal

	import numpy as np


	def load_dataset(mnist_or_fashionmnist: Literal["mnist", "fashionmnist"]):

KaoruNishikawa / example.ipynb

Created August 30, 2024 18:01

Shape annotation in Python

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KaoruNishikawa / call_counter.py

Created June 29, 2024 06:34

Count parentheses

KaoruNishikawa / run_ipynb.py

Last active July 2, 2024 06:00

Run ipynb cells one by one, extracting variable snapshot at each steps

	"""
	## Limitations

	- Extracted variables are just string representation, not arbitrary Python objects
	- Variables defined by substitution (e.g. `a = 1`) would be extracted, but others (e.g. `def func():`) won't
	"""

	import logging
	import time

KaoruNishikawa / diff.py

Last active January 2, 2025 02:31

Print Git-like diff of arbitrary 2 strings in Python

	import difflib


	def diff(a: str, b: str) -> None:
	line_color = {"+": 32, "-": 31}

	diffs = difflib.ndiff(a.splitlines(keepends=True), b.splitlines(keepends=True))
	diff_list = list(diffs)
	styled: list[str] = []
	for prev, next in zip(diff_list, diff_list[1:] + [""]):

KaoruNishikawa / install.sh

Last active August 25, 2022 10:43

NECST installation script for non-docker environment (never tested)

	function get_ros2_workspace() {
	# Look up environment variables.
	# If the value isn't actually a directory, this will create it.
	candidate=($ROS2_WS $ROS_WS)
	for __value in $candidate; do
	if [ ! -z $__value ]; then
	echo $__value
	[ ! -d $__value ] && mkdir -p $__value
	return 0
	fi

KaoruNishikawa / collect

Last active August 11, 2022 03:54

Collect directories in one place

	#!/usr/bin/env python3

	import shutil
	import subprocess
	import sys
	import time
	from pathlib import Path


	save_dir = Path.home() / "Downloads" / "to_upload"

KaoruNishikawa / imshow_skewed.py

Created July 29, 2022 10:39

Draw skewed image on skewed axis.

	__all__ = ["imshow_skewed"]

	from typing import Tuple

	import matplotlib.pyplot as plt
	import numpy as np
	from matplotlib.transforms import Affine2D
	from mpl_toolkits.axisartist import floating_axes
	from mpl_toolkits.axisartist.grid_finder import DictFormatter, FixedLocator

KaoruNishikawa / neclib_pyproject.toml

Created March 28, 2022 05:33

Poetry: SolveProblemError when a package with multiple constraints in project dependency and its sub-dependency

KaoruNishikawa / dataarray_force_context.py

Last active September 19, 2021 08:08

	import functools
	import types

	import xarray as xr


	@xr.register_dataarray_accessor("accessor_name")
	class Something(xr.DataArray):
	__slots__ = (
	"_cache",

Kaoru Nishikawa KaoruNishikawa