matthewpoer

Code samples to demonstrate Python iterators and the use of yield statements to create a generator.

Examples based directly on the instruction from Programiz' YouTube Channel

• #28: Iterators in Python | Python for Beginners
• #29: Generators in Python: How to Use them & Why? | Python for Beginners

matthewpoer

Using Weasyprint with AWS Lambda on Python 3.8

A tedious because Lambda's Python 3.8 runtime does not include all of the typical build tools to generate Weasyprint's dependencies.

Also included here are steps to generate fonts, because Lambda doesn't have any and while it is interesting to look at a fully formatted document where all of the characters are .notdef glyphs, it's more productive to be able to read your pretty new PDF file.

The files in this gist are "flat" because gist does not allow us to show directories, so note the following dir structure:

matthewpoer

import time
some_list = [1,2,3,4,5,6]
counter = 0
for file in some_list:
    counter += 1
    percent = round((counter/len(some_list))*100, 2)
    message = "==== Progress: " + str(percent) + "% ===="
    if percent < 100:
        # this line ending and buffer-flush allow us to re-write over this line again
        print(message, end='\r', flush=True)

matthewpoer

for fn in *; do printf "$fn::" ; cat $fn ; printf "\n"; done

matthewpoer

# curl https://gist.githubusercontent.com/matthewpoer/5b09ea547bbdd7cdc304deb778465344/raw/93154518e28736d6e71a09dbb4176d6b0d5fac91/conky.conf --output ~/.config/conky/conky.conf

conky.config = {
  alignment = 'top_right',
  background = false,
  border_width = 0.5,
  cpu_avg_samples = 4,
  default_color = 'white',
  default_outline_color = 'grey',
  default_shade_color = 'black',

matthewpoer

<?php

$a = array(
    'one',
    'two',
    'three',
);
$b = array(
    'four',
    'five',

matthewpoer

#!/usr/bin/env bash
set -e

# You'll need to set these variables here or with an environment variable
# mysqlPassword
# mysqlHostname
# mysqlUsername
# mysqlDatabase

# List out the tables you want to copy down,

matthewpoer

<?php
$input = null;
$handle = fopen("php://stdin","r");
while($input != 'You are pretty') {
    echo 'Tell me I\'m pretty.' . PHP_EOL;
    $input = trim(fgets($handle));
}
echo 'You don\'t mean it' . PHP_EOL;
die(1);

matthewpoer

How echo handles newlines based on shebang lines and Bash settings

The problem

Why would sh and bash perform differently on a system where they map to the same binary executable?

Consider such an environment:

> which sh && which bash
/bin/sh

matthewpoer

<?php
echo "Counting to 10" . PHP_EOL;
for($i = 0; $i < 10; $i++) {
    echo "Count is at {$i}\r";
    usleep(500000); // half of one second
}
echo "Count is at {$i}" . PHP_EOL;