jinja2 - w3toppers.com

How to navigate through FastAPI routes by clicking on HTML button in Jinja2 Templates?

Backend Your /tasks endpoint (i.e., find_all_tasks function) should return a new Jinja2 TemplateResponse with the list of tasks. For instance: @app.get(‘/tasks’) def find_all_tasks(request: Request): tasks = [‘task 1’, ‘task 2’, ‘task 3’] return templates.TemplateResponse(“tasks.html”, {“request”: request, ‘tasks’: tasks}) Frontend 1. Click on the URL to get to the tasks page In index.html, you can use … Read more

How to generate an html directory list using Python

You could separate the directory tree generation and its rendering as html. To generate the tree you could use a simple recursive function: def make_tree(path): tree = dict(name=os.path.basename(path), children=[]) try: lst = os.listdir(path) except OSError: pass #ignore errors else: for name in lst: fn = os.path.join(path, name) if os.path.isdir(fn): tree[‘children’].append(make_tree(fn)) else: tree[‘children’].append(dict(name=name)) return tree To … Read more

How to use jinja2 as a templating engine in Django 1.8

Frist you have to install jinja2: $ pip install Jinja2 Then modify your TEMPLATES list in the settings.py to contain the jinja2 BACKEND : TEMPLATES = [ { ‘BACKEND’: ‘django.template.backends.jinja2.Jinja2’, ‘DIRS’: [os.path.join(BASE_DIR, ‘templates/jinja2’)], ‘APP_DIRS’: True, ‘OPTIONS’: {‘environment’: ‘myproject.jinja2.Environment’,}, }, { ‘BACKEND’: ‘django.template.backends.django.DjangoTemplates’, ‘DIRS’: [], ‘APP_DIRS’: True, ‘OPTIONS’: { ‘context_processors’: [ ‘django.template.context_processors.debug’, ‘django.template.context_processors.request’, ‘django.contrib.auth.context_processors.auth’, ‘django.contrib.messages.context_processors.messages’, ], … Read more

Jinja render text in HTML preserving line breaks

All whitespace, including newlines, is turned into a single space in HTML. Your options, from best to worst: Put white-space: pre-wrap; on the containing element. This tells HTML to show all whitespace exactly as it appears in the source, including newlines. (You could also use a <pre> tag, but that will also disable word-wrapping, which … Read more

How to get the updated list of items in Jinja2 template using FastAPI?

This sounds like a use case for WebSockets. The below is based on the example given in the documentation above, and can handle multiple connections, broadcasting the newly added comment to all the connected clients. Thus, if you open http://127.0.0.1:8000/ in multiple tabs in your browser, and add a new comment using one of these … Read more

How can I make Ansible interpret a variable inside a variable?

As advised in the Frequently Asked Questions of Ansible, moustache do not stack. Another rule is ‘moustaches don’t stack’. We often see this: {{ somevar_{{other_var}} }} The above DOES NOT WORK as you expect, if you need to use a dynamic variable use the following as appropriate: {{ hostvars[inventory_hostname][‘somevar_’ ~ other_var] }} For ‘non host … Read more

How to render by Vue instead of Jinja

The other option is to redefine the delimiters used by Vue.js. This is handy if you have a lot of existing template code and you wish to start adding Vue.js functionality to a Flask or Django project. var app = new Vue({ el: ‘#app’, data: { message: ‘Hello Vue!’ }, delimiters: [‘[[‘,’]]’] }) Then in … Read more

Jinja2 template variable if None Object set a default value

Use the none test (not to be confused with Python’s None object!): {% if p is not none %} {{ p.User[‘first_name’] }} {% else %} NONE {% endif %} or: {{ p.User[‘first_name’] if p is not none else ‘NONE’ }} or if you need an empty string: {{ p.User[‘first_name’] if p is not none }}

Serve static files from a CDN rather than Flask in production

There’s no need to change how you link to static files, you can still use url_for(‘static’, filename=”myfile.txt”). Replace the default static view with one that redirects to the CDN if it is configured. from urllib.parse import urljoin # or for python 2: from urlparse import urljoin from flask import redirect @app.endpoint(‘static’) def static(filename): static_url = … Read more

Jinja2: Change the value of a variable inside a loop

Try also dictionary-based approach. It seems to be less ugly. {% set vars = {‘foo’: False} %} {% for item in items %} {% if vars.update({‘foo’: True}) %} {% endif %} {% if vars.foo %} Ok(1)! {% endif %} {% endfor %} {% if vars.foo %} Ok(2)! {% endif %} This also renders: Ok(1)! Ok(2)!