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

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""):

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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.

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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),

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import argparse
import os

import boto3


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

atenni

How to convert raw Echo360 Personal Capture file with ffmpeg

When Echo360 Personal Capture is set to record video and display, the output file is a container containing both video streams (at least on Windows 7). If you want to edit this footage in third party software before uploading it into Echo you'll probably need to seperate these video streams. Using ffmpeg is one way to do this.

Quick start

ffmpeg -i audiovideodisplay.wmv \

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$ 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

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Keybase proof

I hereby claim:

• I am atenni on github.
• I am atenni (https://keybase.io/atenni) on keybase.
• I have a public key whose fingerprint is 5354 0DBA 6CB6 0CFB 4BFD 21ED 2CC2 BDDA EA0E 29B8

To claim this, I am signing this object:

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