thoppe

timvieira

import numpy as np
from numpy.random import uniform


def update(S, k, v):
    "Update value position `k` in time O(log n)."
    d = S.shape[0]
    i = d//2 + k
    S[i] = v
    while i > 0:

dmmfll

"""Embed a YouTube video via its embed url into a notebook."""
from functools import partial

from IPython.display import display, IFrame

width, height = (560, 315, )

def _iframe_attrs(embed_url):
    """Get IFrame args."""
    return (

benhoyt

"""Test how many threads we can run at once."""

import itertools
import threading
import time
import sys

import requests

jagrosh

Step 1 - Make a Discord Webhook

1. Find the Discord channel in which you would like to send commits and other updates

2. In the settings for that channel, find the Webhooks option and create a new webhook. Note: Do NOT give this URL out to the public. Anyone or service can post messages to this channel, without even needing to be in the server. Keep it safe!

Step 2 - Set up the webhook on Github

1. Navigate to your repository on Github, and open the Settings

roycoding

Multi-armed banditry in Python with slots

Roy Keyes

22 Aug 2016 - This is a post on my blog.

I recently released slots, a Python library that implements multi-armed bandit strategies. If that sounds like something that won't put you to sleep, then please pip install slots and read on.

Multi-armed bandits

benhoyt

"""Calculate the average number of moves in a snakes and ladders game.

Because as a parent one gets roped into these board (boring?) games
every so often, and I wanted to calculate the average duration of a
snakes and ladders game. Turns out it's about 36 moves (though
admittedly that's for a single-player game). :-)

> python snakes_and_ladders.py
Played 10000 rounds, averaged 36.0559 moves, max 324 moves, took 0.508s
"""

benhoyt

"""Calculate the probability of generating a duplicate random number after
generating "n" random numbers in the range "d".

Usage: python birthday_probability.py n [d=365]

Each value can either be an integer directly, or in the format "2**x", where
x is the number of bits in the value.

For example, to calculate the probability that two people will have the same
birthday in a room with 23 people:

sorenbouma

import gym
import numpy as np 
import matplotlib.pyplot as plt
env = gym.make('CartPole-v0')
env.render(close=True)
#vector of means(mu) and standard dev(sigma) for each paramater
mu=np.random.uniform(size=state.shape)
sigma=np.random.uniform(low=0.001,size=state.shape)

benhoyt

"""Print most frequent N-grams in given file.

Usage: python ngrams.py filename

Problem description: Build a tool which receives a corpus of text,
analyses it and reports the top 10 most frequent bigrams, trigrams,
four-grams (i.e. most frequently occurring two, three and four word
consecutive combinations).

NOTES