Flask 面试题与答案

问题 11. How can we get a string in Flask?

We can get the string by using the argument's value. This value will be used as the request object in Flask.

For example, we can try this sample code:

from flask import Flask
from flask import request
app=Flask(_name_)
@app.route(“/”)
def index():
  val=request.args.get(“var”)
  return “Hello,World {}”
  if_name_==”_main_”:
    app.run(host=”0.0.0.0”,port=8080)

问题 12. Why is Flask famous as a microframework?

It has some core features like requests, routing, and blueprints, as well as a few other features like coaching, ORM, and forms. Because of all these features, we call Flask a microframework.

问题 13. How can we integrate any API like Facebook with the Flask application?

We can integrate it easily with the help of the Flask extension named Flask-Social. It gives multiple access to users for other social platforms also. One thing we need to remember is that we have to use the Flask-Security extension of Flask for security purposes. For this, we need to install all social API libraries in Python. We have to register from an external API service provider.

问题 14. Can we use the SQLite database in Flask?

Yes, it is built-in with Python as a database. We don’t have to install any extensions. Inside the Python view, we can import SQLite. There we can write SQL queries to interact with a database. Generally, the Python Flask developers use Flask-SQLAlchemy, which makes the SQL queries easier. It has one ORM, which helps to interact with the SQLite database.

问题 15. Can you briefly talk about the Flask template engine?

The Flask template engine allows developers to create HTML templates with placeholders for dynamic data. Actually, a template is a file that contains two types of data, one is static and another is dynamic. Mostly this dynamic template is popular because the data is in run time. Flask allows the Jinja2 template engine to be used mostly as a template engine. Flask’s render_template method needs parameters and their values.