Of course! Using Python 3.5.2 with Eclipse is a classic setup, often done with the PyDev plugin. While this version of Python is quite old (released in 2025), it's still possible to set up and use.

Here is a comprehensive, step-by-step guide to get you started.

Overview of the Process

1. Prerequisites: Ensure you have Java installed (Eclipse is a Java application).
2. Install Eclipse: Download and install a compatible version of Eclipse IDE for Java Developers.
3. Install PyDev: Add the PyDev plugin to your Eclipse installation.
4. Configure PyDev for Python 3.5.2: Tell PyDev where to find your Python 3.5.2 interpreter.
5. Create a Project and Run Code: Put it all together to write and execute a simple Python script.

Step 1: Prerequisites

• Java Runtime Environment (JRE): Eclipse requires a JRE to run. If you don't have it, download it from the official Oracle Java SE Downloads page (Java 8 is a stable and common choice for older Eclipse versions). You can check if you have it by opening a terminal or command prompt and typing java -version.
• Python 3.5.2: You must have Python 3.5.2 installed on your system.
  • Windows: Download the installer from the Python 3.5.2 release page on the Python Archive. Make sure to check the box "Add Python 3.5 to PATH" during installation.
  • macOS: You can use Homebrew: brew install python@3.5. Or download from the same archive link above.
  • Linux: Use your distribution's package manager. For example, on Ubuntu/Debian:

    # You may need to add a PPA for older Python versions
    sudo add-apt-repository ppa:deadsnakes/ppa
    sudo apt-get update
    sudo apt-get install python3.5

  • Verify Installation: Open a terminal and type python3.5 --version. It should return Python 3.5.2.

Step 2: Install Eclipse

1. Go to the Eclipse IDE for Java Developers download page.
2. Important: You need an Eclipse version that was current around the time Python 3.5.2 was released. A good choice is Eclipse Mars.2 (4.5.2) or Eclipse Neon (4.6). These are old but stable and work well with older PyDev versions.
3. Download the appropriate package for your operating system (e.g., "Eclipse IDE for Java Developers 64 bit").
4. Extract the downloaded .zip file to a location of your choice (e.g., C:\ on Windows or /opt/ on Linux). There is no installer; you just run the eclipse.exe (or eclipse) file.

Step 3: Install the PyDev Plugin

1. Launch the Eclipse application you just extracted.
2. When asked to select a workspace, choose or create a folder where you want to store your Eclipse projects.
3. Go to Help -> Install New Software....
4. In the "Work with" field, enter the PyDev update site URL:

   http://pydev.org/updates

5. Click Add... to add a new repository.
   • Name: PyDev
   • Location: http://pydev.org/updates
   • Click OK.
6. Eclipse will take a moment to load the available software. Expand the PyDev tree in the list below.
7. Check the box next to PyDev and click Next >.
8. Review the details and click Next > again to accept the license terms.
9. Click Finish.
10. The installation will proceed. Eclipse may ask you to restart. Click Yes to restart.

Step 4: Configure PyDev for Python 3.5.2

This is the most critical step. You must tell PyDev where your Python interpreter is located.

1. After restarting, go to Window -> Preferences.
2. In the Preferences window, navigate to PyDev -> Interpreter - Python.
3. Click the New... button on the right.
4. A "Select Interpreter" dialog will appear.
   • Interpreter Name: Give it a descriptive name, like Python 3.5.2.
   • Interpreter Executable: This is the path to your python.exe or python executable.
     • Windows: If you checked "Add Python to PATH", you can type python in the "Interpreter Executable" field, and Eclipse should find it. If not, browse to it, typically C:\Python35\python.exe.
     • macOS/Linux: It's often /usr/local/bin/python3.5 or /usr/bin/python3.5. You can find the exact path by typing which python3.5 in your terminal.
5. Click OK. PyDev will now analyze your interpreter. This can take a minute or two. It will find all the standard library modules.
6. Once it's done, you will see your new interpreter in the list. Make sure the checkbox next to Python 3.5.2 is checked.
7. Click Apply and Close.

Step 5: Create a Project and Run Code

Now you're ready to code!

1. Go to File -> New -> PyDev Project.

   
   （图片来源网络，侵删）

2. Project name: Give your project a name (e.g., MyPyDevProject).

3. Ensure "Use default" is selected for the interpreter. This should automatically pick the Python 3.5.2 interpreter you just configured.

4. Click Finish.

5. Eclipse will create your project. It might open a "PyDev Perspective" which is a layout optimized for Python development.

6. Right-click on your project in the "Project Explorer" on the left.

7. Go to New -> PyDev Module.

8. Module name: Give your file a name (e.g., hello_world). Do not include a .py extension.

9. Click Finish.

10. A new file named hello_world.py will be created and opened. Type some code:

    # This is a comment in Python 3.5.2
    def greet(name):
        """This is a docstring."""
        print("Hello, {}!".format(name))
        return True
    if __name__ == "__main__":
        user_name = input("Please enter your name: ")
        greet(user_name)

11. Run the code:

    • Right-click anywhere inside the editor.
    • Go to Run As -> Python Run.
    • The "Console" view at the bottom of the screen will appear, and you can interact with your program.

Troubleshooting Common Issues

• Problem: ImportError: No module named 'tkinter'

  • Cause: The tkinter GUI library, which comes with Python, might not have been installed correctly.
  • Solution: On Windows, you may need to re-run the Python installer and ensure "tcl/tk and IDLE" is selected. On Linux, install it with your package manager (e.g., sudo apt-get install python3.5-tk).

• Problem: PyDev can't find a library you installed (e.g., pip install requests).

  • Cause: PyDev's index might be out of date.
  • Solution: Right-click on your project -> PyDev -> Refresh Libs. If that doesn't work, you can force a rebuild of the project's path: Right-click project -> Build Path -> Configure Build Path... -> Libraries tab -> Select the interpreter -> Edit -> click "Refresh" button.

• Problem: The "Run As" menu is missing or doesn't have "Python Run".

  • Cause: You might have a syntax error in your file, or PyDev is not recognizing the file as a Python script.
  • Solution: Check for syntax errors in the editor (red underlines). Ensure your file has a .py extension and that PyDev is the default editor for it (Right-click file -> Open With -> PyDev Editor).

Important Considerations for Python 3.5.2

• Security: Python 3.5.2 is end-of-life and no longer receives security updates. It should not be