table of Contents
There are no parameters in the template
Pass parameters to the template
description
The render_template() function is the flask function, which renders the given template context from the templates folder templates.
Syntax and parameters
import flask
flask.render_template(template_name, **context)⚠️ The render_template() function needs to call the flask package
| name | meaning | Remarks |
| template_name | Template file name | String parameter, cannot be omitted |
| context | Template parameter | A dictionary composed of template parameters and corresponding values, parameters that can be omitted |
return value
str. The render_template() function returns the template text after replacing the template parameters.
Usage example
There are no parameters in the template
The template../templates/hello_world.html is as follows:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Hello world</title>
</head>
<body>
<h1> Hello World! </h1>
</body>
</html>Example of using render_template:
import flask
app = flask.Flask(__name__)
@app.route("/hello")
def hello():
return flask.render_template("hello_world.html")
if __name__ == '__main__':
app.run()After running, enter http://127.0.0.1:5000/hello in the browser, and the results are as follows:
Pass parameters to the template
When there are variable parameters in the template, the render_template() function can pass parameters to the template:
The template../templates/for.html is as follows:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Jinja2 Circulation Control</title>
</head>
<body>
<h1> {
{product}} list: </h1>
<ul>
{% for product in products %}
<li>{
{product}}</li>
{% endfor %}
</ul>
</body>
</html>Example of using render_template:
import flask
app = flask.Flask(__name__)
@app.route("/")
def index():
products = ["iphoneX", "MacBook Pro", "Huawei"]
kwargs = {
"products": products
}
return flask.render_template("for.html", **kwargs)
if __name__ == '__main__':
app.run()
After running, enter http://127.0.0.1:5000/ in the browser, and the results are as follows:
