Eclipse IDE is a wonderful piece of free IDE software and Python is the language that makes many programmers very “excited” – so why not bring them together? Python is also a great programming language for new programmers.
Eclipse IDE added full functionality for Python developers through PyDev. For existing Eclipse users, PyDev can be added as an add-on. Alternatively, a version of Eclipse with PyDev pre-installed can be downloaded from the Eclipse download page. For more information on how to install and set up Eclipse IDE, see Eclipse IDE for web developers for more information.
Installing Python on your computer
For PyDev to function, Python needs to be installed on your PC.
By default, some computers come pre-installed with Python, which will usually be Python 2.x. Python 2 is considered legacy, which means it is no longer maintained or supported. Python 2 and Python 3 are very similar, but does have small differences when it comes to some commands. Python 2 code cannot be executed in Python 3 and vice versa. While setting up the IDE, the version of Python installed (2 or 3) needs to be known. By repeating the installation process, multiple versions of Python can be installed on the same computer.
Taking this into consideration, the desired version of Python (version 2.x or 3.x) can be obtained from www.python.org. To add Python to PATH (recommended), make sure to click the Add Python to PATH checkbox. Simply use the Install Now option. All the other installation settings can be left to their defaults.
After the installation is finished, click on the Close button and move onto installing PyDev for Eclipse.
Installing PyDev for Eclipse
PyDev is installed onto Eclipse the same way any other Eclipse add-on is installed. A working version of Python needs to be installed first (see earlier).
- In the Eclipse Workbench choose Help > Install New Software
- Click on the Available Software Sites link and click on the Add… button.
- For the name use any name (e.g., “PyDev”)
- For the location use
http://pydev.org/updates, then click OK and OK again to go back to the Install screen.
- Under Work with: type “pydev” and select the first PyDev entry > Next
- Click Next, Next, read and accept the license, Finish
- If Eclipse asks whether to trust the PyDev certificate, agree.
- When the install is complete, allow Eclipse to restart.
Setting up the Eclipse, Python Interpreter
The Python interpreter is basically a program, that knows how to execute Python code. It will interpret, or translate, Python instructions into instructions that a computer can understand. After the required version of Python (version 2.x or version 3.x) has been installed, the following steps are needed to set up the Python interpreter in Eclipse (note the small differences between Python 2.x and 3.x):
- Start > All Programs and search for the Python version installed
- In the Python menu directory, right-click on ‘Python (command line)’ when using Python version 2.x, or right-click on ‘Python’ when using Python version 3.x
- Select Properties
- In the Shortcut tab, copy the target directory line (Right-click, copy).
- In the Eclipse Workbench, choose Window > Preferences
- Click on PyDev > Interpreters > Python Interpreter
- In the top box, click on New… and copy the target directory from the Start Menu to the Interpreter Executable field
- Make sure the line ends with python.exe, give it a name (i.e. Python x) and press OK, then OK again.
Creating a project with PyDev and Eclipse
To create a new Python project:
- File > New > Project
- In the Wizard, click on Pydev to expand it, select Pydev Project and click Next.
- Give the project a name.
- Make sure the grammar version matches the installed version of Python and the Interpreter is the one just set up.
- If asked to include the Pydev Perspective, say yes.
After creating a Pydev project, the PyDev Package Explorer will be available in the Eclipse Perspectives area (top right corner of the Eclipse Workbench). To start working in a Pydev project, make sure to be in this perspective (by clicking on the perspective icon).
To test Eclipse’s new Python environment, get started with “Hello, World”. The main file types to be used when programming in Python is Python files. Python files have
.py as its extension. To create a new
.py file, right-click on the Pydev Project > New > File, and name the file
#!/usr/bin/python print "Hello, World!"and for Python 3.x use:
#!/usr/bin/python3 print("Hello, World!")
Save the file and click on run (the green play triangle sign). Choose Python Run. If all is in order the result should show in the Eclipse Console (on the bottom of the screen).