Which programming language do you need to learn to understand the Django framework?

Django is a high-level web framework based on the Python programming language. If you want to learn the Django framework, then you need to master the Python programming language. Python is an elegant, clear, easy-to-read and write programming language. Django takes advantage of Python to implement simple yet powerful web applications.

The following is a simple Python sample code to print the "Hello, World!" message on the console:

print("Hello, World!")

The best way to learn Python is through learning resources on the Internet. This includes official documentation and online tutorials. The official Python documentation is detailed and well-structured, which makes learning Python easier.

To learn the Django framework, we recommend that you understand the following Python concepts:

1. Variables: Variables are values ​​stored in computer memory. Python variables are assigned using the equal sign (=).

# 声明变量
message = "Hello, World!"
# 打印变量
print(message)

2. Data types: There are many data types in Python, including strings, integers, floating point numbers, Boolean values, and lists. The data type of a variable is determined by the value.

# 字符串
message = "Hello, World!"
# 整数
age = 25
# 浮点数
height = 1.78
# 布尔值
is_student = True
# 列表
my_list = [1, 2, 3, 4, 5]

3. Function: A function is a reusable block of code that accepts input and returns output. Functions are defined by the def keyword.

# 函数定义
def greet(name):
    print("Hello, " + name + "!")
# 调用函数
greet("Alice")

4. Conditional statements: Python uses if statements to perform different operations based on the true or false value of the expression result.

# 条件语句
number = 10
if number > 0:
    print("The number is positive.")
elif number < 0:
    print("The number is negative.")
else:
    print("The number is zero.")

5. Loops: Python uses loop statements to execute a sequence of code multiple times.

# for循环
my_list = [1, 2, 3, 4, 5]
for number in my_list:
    print(number)
# while循环
number = 1
while number <= 5:
    print(number)
    number += 1

After learning Python, you can start learning the Django framework. Django is a web framework based on the MVC pattern, which provides many powerful tools and libraries to help you build web applications quickly and easily. Here is an example of a simple Django application:

# 引入必要的Django模块和库
from django.http import HttpResponse
from django.urls import path

# 视图函数定义
def hello(request):
    return HttpResponse("Hello, World!")

# URL映射
urlpatterns = [
    path('hello/', hello),
]

# 启动应用程序
if __name__ == "__main__":
    # 启动Django服务器
    from django.core.management import execute_from_command_line
    execute_from_command_line(['manage.py', 'runserver'])

In the above example, the view function defines a simple response that returns the "Hello, World!" string. URL mapping uses the path() method to associate URL paths with view functions. Finally, the code that starts the application uses Django's execute_from_command_line() method to start the server.

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