Reload Flask app when template file changes
By default, when running Flask application using the built-in server (Flask.run), it monitors its Python files and automatically reloads the app if its code changes:
jinja2
How do I format a date in Jinja2?
Using Jinja2, how do I format a date field? I know in Python I can simply do this:
Update and render a value from Flask periodically
I want to display my CPU usage dynamically. I don’t want to reload the page to see a new value. I know how to get the CPU usage in Python. Right now I render a template with the value. How can I continually update a page with a value from Flask?
Serve image stored in SQLAlchemy LargeBinary column
I want to upload a file and store it in the database. I created a LargeBinary column.
Create dynamic arguments for url_for in Flask
I have a jinja2 template which I reuse for different Flask routes. All of these routes have a single required parameter and handle only GET requests, but some routes may have extra arguments.
How to pass a list from Python, by Jinja2 to JavaScript
Let’s say I have a Python variable:
Jinja2: Change the value of a variable inside a loop
I want to change the value of the variable declared outside the loop within a loop. But always changing, it keeps the initial value outside the loop.
Display image stored as binary blob in template
I have a model with an image stored as a binary blob. I want to display this image, along with other data about the object, in a template. Since the image is not a separate file, I can’t figure out how to display it. I’ve tried setting headers, or using send_file or render_template, but I either don’t get the image or only get the image and not the rest of the template. How can I display a binary blob as an image in a template?
zip(list1, list2) in Jinja2?
I’m doing code generation in Jinja2 and I frequently want to iterate through two lists together (i.e. variables names and types), is there a simple way to do this or do I need to just pass a pre-zipped list? I was unable to find such a function in the docs or googling.
Get lengths of a list in a jinja2 template
How do I get the number of elements in a list in jinja2 template?