ptmcg

# shuffled.py - faster than random.shuffle, and will accept any sequence, not just indexables (like lists)
shuffled = lambda seq, rnd=random.random: sorted(seq, key=lambda _: rnd())

print(shuffled(range(20))

ptmcg

ptmcg

"""
https://chat.stackoverflow.com/transcript/message/47865711#47865711

Well it's mainly "utility functions", ie I need to define a (keplerian) orbit. Which is normally done by giving
semi-major axis, eccentricity, inclination, argument periapsis and longitude ascending node. However there are lots
of "variations": ie for parabolic orbits the semi major axis is replaced by semi latus rectum. Or you can just use
state variables at a point (position + velocity in 3 dimensions). Or you could replace the semi major axis +
eccentricity by peri + apo apsis.
"""

ptmcg

#
# graph_algebra.py
#
# A rough implementation of a graph algebra.
#
# References:
#     https://statagroup.com/articles/an-algebra-for-graph-structures
#     https://www.youtube.com/watch?v=EdQGLewU-8k
#
# Copyright 2020, Paul McGuire

ptmcg

#
# simple JSON item accessor
#
import json

def json_accessor(fn):
    def _inner(src, keypath, *args):
        if not isinstance(keypath, (tuple, list)):
            keypath = [keypath]
        src_dict = json.loads(src)

ptmcg

# rk.py
#
# Copyright 2020, Paul McGuire
#
from typing import Callable, Sequence
from array import array


class RKIntegrator:
    """

ptmcg

import time, sys, base64
for i, v in enumerate((getattr, time, sys, "sleep", 
                        "decode", "bytes", "stdout", 
                        "write", "flush", 1.0, 6, 
                        base64, "upper", 1000.0, "'",
                        print, 0), start=3):
    vars()['_'*i] = v
_ = (
    b'RGFpc3kgRGFpc3kgZ2l2ZSBtZSB5b3VyIGFuc3dlciBk'
    b'bwpJJ20gaGFsZiBjcmF6eSBhbGwgZm9y\nIHRoZSBsb3'

ptmcg

#
# py_rac.py
#
# Copyright 2020, Paul McGuire
#

names = ("Voltaire|Samuel Johnson|Valery|Dante|"
    "Nietzsche|Kant|Lao Tzu|Macchiavelli|Einstein|"
    "Russell|Leonardo|Plato|Aristotle|Socrates|Diderot|"
    "Descartes|Thomas Aquinas|Hawking|Emerson|Faulkner|"

ptmcg

#
# rcu.py
#
# Paul McGuire - November, 2020
#
from contextlib import contextmanager
import copy
import threading

ptmcg

#
# corinthians_I.py
#
# Class definitions to use when recreating I Corinthians 13:4-8 from 
# the Python prompt.
#
# Copyright 2020, Paul McGuire
#
import sys
sys.excepthook = lambda *args: print(args[0].__name__)