Why template is needed?
Let's say we need to a number of dynamic html page. The page need to be changed based on data from outside. Without template, we need to make a static HTML page in manual way. "template" gives an easy way to replace page's content in a very simple way. it feels like a mail merge feature in a word processor.As we want to make a dynamic page, we need to use this feature "template"
(I am following this Flask tutorial)
This instruction shows how to deal with template, url_for in Flask.
How to use "template"?
import class
in order to use "template", firstly we need to import a class named "render_template" in python file.from flask import Flask, render_template
preparing a HTML file in "templates" folder
I prepared "hello.html" inside of templates folder.
templates/hello.html
templates/hello.html
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> </head> <body> <h1>This is hello world</h1> </body> </html>
code it (test.py)
from flask import Flask, render_template app = Flask(__name__) @app.route("/") @app.route("/hello") def hello(): return render_template("hello.html") if __name__ == "__main__": app.run(debug=True)
result
Sending Data
from flask import Flask, render_template app = Flask(__name__) varForPython = ["welcome", "to", "my", "channel!"] @app.route("/") @app.route("/hello") def hello(): return render_template("hello.html", varForHtml = varForPython) if __name__ == "__main__": app.run(debug=True)
Receiving Data and Using it in the HTML file
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> </head> <body> {% for line in varForHtml%} <h1> {{ line.name }} </h1> <p> {{ line.title }}</p> <p>{{ line.date }}</p> {% endfor %} </body> </html>
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