app.py

import os

import yaml
from jinja2 import Template
import shutil
import random


def batch(iterable, n=1):
    l = len(iterable)
    for ndx in range(0, l, n):
        yield iterable[ndx:min(ndx + n, l)]


with open(r'input.yaml') as file:
    data = yaml.load(file, yaml.FullLoader)
    page = data["page"]
    projects = data["projects"]
    random.shuffle(projects)
    for x in batch(projects, 3):
        r = random.randint(0, 3)
        if r < len(x):
            x[r]["bordered"] = True

    jinja2_template_string = open("site/template.html", 'r').read()
    template = Template(jinja2_template_string)

    html_template_string = template.render({"page": page, "projects": projects})

    shutil.rmtree("output", True)
    shutil.copytree("site", "output")
    os.remove("output/template.html")

    output = open("output/index.html", "w")
    output.write(html_template_string)
    output.close()