AgendaPipVirtualenvFlaskGunicProcedureSetp 1 Install Pip
Install Pip for package management.Pip is a popular and effective tool for package management.
$ easy_install pip
To access the best practice, you can specify the version of easy_install like “easy_install-2.6 pip”, since our system has included various python interpreter versions.
Setp 2 Install Virualenv
Install Virtualenv by pip.To avoid our system env being contaminated by the current project.
$ pip install virtualenv
Then you can create an virtual environment for the current project.
$ virtualenv .env
Now, you must activate this virtual environment to use custom python interpreters.
$ source .env/bin/activate(.env)$
When you finish your code. you can deactivate virtual env to back to original python interpreters.
(.env)$ deactivate$
Step 3 Install Flask
Install Flask by pip.Flask is a micro web development framework for Python. It’s effective and not too bloat like django.shell$ pip install flask
Let’s create a simple web page.
(.env)$ cat >> main.py << EOF> from flask import Flask> app = Flask(__name__)> > @app.route("/")> def hello():> return "Hello World!"> > if __name__ == "__main__":> app.run()> EOF(.env)$ python main.py * Running on http://127.0.0.1:5000/
Now, you can view this page at http://127.0.0.1:5000/.
Step 4 Install Gunicorn
The development of web server is always a tricky issue in web development. Fortunately, in python there are a few tools including Gunicorn to help you finish it efficiently.
(.env)$ pip install gunicorn(.env)$ gunicorn main:app2013-01-05 14:52:41 [84334] [INFO] Starting unicorn 0.16.12013-01-05 14:52:41 [84334] [INFO] Listening at: http://127.0.0.1:8000 (84334)2013-01-05 14:52:41 [84334] [INFO] Using worker: sync2013-01-05 14:52:41 [84335] [INFO] Booting worker with pid: 84335
Conclusion
The complexity of web development builds it a high threshold. Even a practice like “Hello World” has involved network, http protocol, browser, HTML etc.These frameworks and tools can let us focus on logic layouts, finishing our missions quickly and efficiently.
PipVirtualenvFlaskGunicorn
