Introduction to the load function in Flask 3.0
Hello friends! Today we want to discuss one of the useful functions in the Flask 3.0 framework. One of the areas where we interact with Flask in web projects is the process of loading and managing data. The load() function is one of these functions that helps us to easily load data from a file or database and utilize it in our projects.
When using Flask, we usually need to easily access the data available in our database or files. The load() function makes our job in this area easy. With the help of this function, we can quickly load the necessary data and display it on web pages.
Let's take a look at the following code to see how we can use load() in Flask 3.0. Keep in mind that using this function alongside the concept of context in Flask is very important and essential.
Here is a simple example that utilizes the load() function. After viewing the code, I will provide explanations for each part of it.
from flask import Flask, request, render_template
app = Flask(__name__)
@app.route('/data')
def get_data():
data = load_data_from_file() # Loading data from a file
return render_template('data.html', data=data) # Displaying data in the template
def load_data_from_file():
with open('data.json') as f:
return json.load(f) # Loading JSON data
if __name__ == '__main__':
app.run(debug=True)
Code Explanation
Line 1:
from flask import Flask, request, render_templateThis line imports the necessary modules from the Flask framework into our application.
Line 3:
app = Flask(__name__)Here we create an instance of the Flask application.
Line 5:
@app.route('/data')Using the
route decorator, we define a route for our application that corresponds to the URL '/data'.Line 6:
def get_data():Here we define a function called
get_data that is responsible for loading the data.Line 7:
data = load_data_from_file()This line calls a helper function to load the data from a file.
Line 8:
return render_template('data.html', data=data)We send the loaded data to the
data.html template for display on web pages.Line 10:
def load_data_from_file():This function
load_data_from_file is defined for loading data from a file.Line 11:
with open('data.json') as f:The file
data.json is opened to read the data.Line 12:
return json.load(f)The read data is loaded as JSON and returned.
Line 14:
if __name__ == '__main__':This line allows us to run the application in development mode.
Line 15:
app.run(debug=True)This command starts our application with debug mode enabled, allowing us to easily identify any potential issues.