YCmove

Using strace and lsof to debug blocked processes

You can use strace on a specific pid to figure out what a specific process is doing, e.g.:

strace -fp <pid>

You might see something like:

select(9, [3 5 8], [], [], {0, 999999}) = 0 (Timeout)

The Best of the Best Practices (BOBP) Guide for Python

A "Best of the Best Practices" (BOBP) guide to developing in Python.

In General

Values

"Build tools for others that you want to be built for you." - Kenneth Reitz
"Simplicity is alway better than functionality." - Pieter Hintjens

Compile FFmpeg on Ubuntu

This basic guide supports Ubuntu Xenial Xerus 16.04 and will enable several external encoding and decoding libraries: libfaac (AAC encoder), libfdk-aac (AAC encoder), libmp3lame (MP3 encoder), libopencore-amr (AMR encoder/decoder), librtmp (for additional RTMP protocols), libtheora (Theora encoder), libvorbis (Vorbis encoder), libvpx (VP8 encoder/decoder), and libx264 (H.264 encoder). These are optional and may be omitted if desired. This guide will also install many filters (see the filter list in the [Filtering Guide][1].

Note: Copy and paste the whole code box for each step.

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<title>WebSocket Client</title>
	<style>
	#output {
	border: solid 1px #000;
	}
	</style>
	</head>

	#!/bin/bash

	# shell script to create a simple mongodb replica set (tested on osx)
	set -e

	red=$(tput setaf 1)
	green=$(tput setaf 2)
	yellow=$(tput setaf 3)
	default=$(tput sgr0)

	# coding=utf-8
	# Note:
	# 1. 使用Redis缓存用户信息，减少重复调用
	# 2. 只通过用户的location字段看是否包含beijing、shanghai、guangzhou、
	# shenzhen、china这几个关键词判断是否是国人
	from collections import defaultdict
	import redis
	import requests

	USENAME = '<YOUR USERNSME>'

	const assert = require('assert')

	function getAnimals(fetch, id) {
	return fetch('http://api.animalfarmgame.com/animals/' + id)
	.then(response => response.json())
	.then(data => data.results[0])
	}

	describe('getAnimals', () => {
	it('calls fetch with the correct url', () => {

	#
	# Original solution via StackOverflow:
	# http://stackoverflow.com/questions/35802939/install-only-available-packages-using-conda-install-yes-file-requirements-t
	#

	#
	# Install via `conda` directly.
	# This will fail to install all
	# dependencies. If one fails,
	# all dependencies will fail to install.

	import torch
	import torch.nn as nn
	from torch.nn.utils.rnn import pack_padded_sequence, pad_packed_sequence

	seqs = ['gigantic_string','tiny_str','medium_str']

	# make <pad> idx 0
	vocab = ['<pad>'] + sorted(set(''.join(seqs)))

	# make model