atenni

Problem: When linking to the raw version of a gist, the link changes with each revision.

Solution:

To return the first file from a gist: https://gist.github.com/[gist_user]/[gist_id]/raw/

• Example: https://gist.github.com/atenni/5604522/raw/
• Works even when you change the filename.

To get a file from multi–file gist: https://gist.github.com/[gist_user]/[gist_id]/raw/[file_name]

atenni

How to reopen a pull-request after a force-push?

Precodinitions

• You need the rights to reopen pull requests on the repository.
• The pull request hasn't been merged, just closed.

Instructions

1. Write down the current commit hash of your PR-branch git log --oneline -1 <PR-BRANCH>
2. Write down the latest commit hash on github before the PR has been closed.
3. git push -f origin :

atenni

$ ffmpeg --help

ffmpeg version N-78304-g37db3e8 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.3.0 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfi
g --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libm
p3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena
ble-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-lib

atenni

Use pg_dump to create a dev copy of a DB

Steps

1. Perform pg_dump -> gzip output -> save

   • pg_dump DB_NAME --username=DB_USER | gzip > /location/to/backup.gz
   • Note: if you get "FATAL: Ident authentication failed..." you'll need to look in pg_hba.conf. See below for more info.

2. Unzip -> import into new database

atenni

Bootstrap Raspberry Pi without a USB keyboard or mouse (2019)

Assumes you have a laptop, WiFi only (no LAN), and a HDMI monitor you can use with the Pi.

Credit: most of this info was found here.

Add OS image to SD card

1. Download the latest image of Raspbian.

atenni

Overall this is pretty impressive for someone just starting out - well done!

Here's a few overall design comments. I'll include technical feedback as comments directly in Updated-PythonPractice.py

DRY Principle - Don't Repeat Yourself.

When coding you don't want to write the same piece of functionality twice. In longer programs this type of duplication makes it hard to follow the flow of the

atenni

Recipe: calculate SHA256 hash of file in Python

import hashlib

FILENAME = ''
hasher = hashlib.sha256()

with open(FILENAME, "rb") as f:
 for byte_block in iter(lambda: f.read(4096),b""):

atenni

Docker backed Python project using PyCharm

This quickstart assumes OS X 10.13, PyCharm 2018.1, Docker 18.03, and Python 3.7.

1. Start Docker and PyCharm
2. Create new project - "Pure Python"
3. Set project name and temporarily set the project interpreter to Existing interpreter > Python 3.x (local)
4. Create Dockerfile and/or docker-compose.yml (see samples of each below),

atenni

import argparse
import os

import boto3


class S3MultipartUpload(object):
  # AWS throws EntityTooSmall error for parts smaller than 5 MB
  PART_MINIMUM = int(5e6)

atenni

# encoding: utf-8

import sys
import csv
from urlparse import urlsplit

import cssselect
from lxml import html
import requests