Mr. Lance E Sloan sloanlance

Use the Pillow module for Python to "roll" images horizontally or vertically. When an image is rolled, it is shifted in some direction. The part of the image that would be lost as a result of that shift is added onto the opposite side of the image.

Say Goodbye to Loops in Python, and Welcome Vectorization!

Use Vectorization — a super fast alternative to loops in Python

By Anmol Tomar on CodeX

Nov 29, 2022

Introduction

jq Notebook

Useful notes about using jq.

Print all paths to values
- jq -c paths Prints each path as an array and doesn't show values.
- jq --stream 'select(.[1]|scalars!=null) | "\(.[0]|join(".")): \(.[1]|tojson)"' example.json
  Nearly perfect. If each path shown began with . and array indices were enclosed in square brackets, then each one would be a valid jq query string.

	def nestedFor(m, n):
	"""add each element of m to each element of n"""
	result = []

	for i in m:
	for j in n:
	result.append(i+j)

	return result

	# Note: Regex developed using regex101.com, which generated this code, then was edited further.
	# See: https://regex101.com/r/Vj3CHI/5

	# The regex below is part of the solution for HackerRank challenge:
	# https://www.hackerrank.com/challenges/validate-a-roman-number
	# The regex is probably incomplete, but it's good enough to pass HackerRank tests.

	import re

	regex = r'^(M{,3}(?=([^M]))){,1}([C]{,1}M{,1}){,1}([C]{,1}D{,3}){,1}([X]{,1}C{,3}){,1}(X{,1}L{,1}){,1}(I{,1}X{,3}){,1}(I{1,3}[VX]{,1}\|VI{,3}){,1}$'

	def numbar(n: int) -> str:
	"""
	Make a string of digits for numbering columns in the output. Column
	numbering begins with zero. If the number of columns require more
	place values, newlines are used to make multiple rows in the output.
	E.g., if `n <= 10`, there will be one row of output, but if
	`10 < n <= 100`, there will be two rows of output, etc.
	"""

	rows = len(str(n - 1))

	𝐀 = {'😀': 5}
	for ℹ︎ in range(20):
	# print(i, ℹ︎, i == ℹ︎) # NameError: name 'i' is not defined.
	for _,__ in 𝐀.items():
	if __ == ℹ︎:
	print(_, ℹ︎)

	print(𝐀) # Prints dictionary in 𝐀
	print(A) # Also prints dictionary in 𝐀!
	print(𝐀 is A) # True

	class IndexFormatter:
	def __init__(self, volumeId: int):
	self.itemPages = (
	ItemPage.objects.filter(volume__id=volumeId)
	.order_by('item__topic__name', F('page') * 1, 'item__name'))

	def format(self) -> str:
	"""
	Format the index for printing.
	"""