Python study notes --Day09

Python study notes --Day09

Django simple entry

Introduction to Django

Django is an open source Web application framework written in Python. MTC mode using a frame, i.e. the model M, and template view V T. It was originally to be open for Lawrence Publishing Group's management to some content-based news website, that is CMS (content management system software). It was released in July 2005 under the BSD license.

installation

By pip installation, execution

pip install Django

You can also specify the version of Django installation

pip install django==2.1.5

View django version of the following command

python -m django --version

Or another way

django-admin --version

In fact, there is a third way

C:\>python
>>> import django
>>> django.get_version()

The amount, there is a way, but this is dependent libraries and View installed version by pip

pip freeze
pip list

Project Creation

Creating a project

django-admin startproject 项目名

You will get a django project, the project directory as follows

- manage.py
- test_django
	- __init__.py
	- settings.py
	- urls.py
	- wsgi.py

__init__.pyIt is an empty file that explains test_django is a Python package, settings.pyDjango project's overall profile, urls.pyurl profile, like a "directory", wsgi.pyPython server gateway interface, manage.pyDjango project file management, and project interact command line toolset inlet.

In Django, each module uses a django application to develop. A project is composed by a number of applications, each application will complete their specific function. Create an application :

python manage.py startapp 应用名

Note : To enter the project directory and then create the application.

The following application directory

- migrations
	- __init__.py
- __init__.py
- admin.py
- apps.py
- models.py
- tests.py
- views.py

After the re-configuration is required for registration. Modify settings.pythe INSTALLED_APPS configuration items.

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'a_test', # 注册刚刚建立的应用
]

The project started as a web server command

python manage.py runserver [ip:port]

The above ip and port are optional, you can specify which runs ip address and port.

After that, the browser access localhost:8000can see our Django default welcome page.

The install worked successfully! Congratulations!

However, to be reminded that this server just put Django's own server for development and testing, not production-level server, the server will not be used anywhere in a production environment and relevant. And when you modify the code to make the code to take effect, it does not require frequent re-start the server because it will need in the case of each of the access requests overloads Python code. But sometimes still need to manually restart the server, such as adding new files.
Command prompt Ctrl + Cshut down the server.

Modify settings.pythe time zone and language

# 设置语言代码
LANGUAGE_CODE = 'zh-hans'
# 设置时区
TIME_ZONE = 'Asia/Shanghai'

And then refresh the page and found no change?

Epilogue

Today write this now, sort of little, a little tired, and then continue to operate Django back tomorrow.
If you find my articles where there is an error or have any good ideas can contact me, we study together progress together, my email address is [email protected]

let’s do more of those!