Setp 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
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
Flask is a micro web development framework for Python. It's effective and not too bloat like django.
$ 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
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:app 2013-01-05 14:52:41  [INFO] Starting unicorn 0.16.1 2013-01-05 14:52:41  [INFO] Listening at: http://127.0.0.1:8000 (84334) 2013-01-05 14:52:41  [INFO] Using worker: sync 2013-01-05 14:52:41  [INFO] Booting worker with pid: 84335
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.