Getting Started

Introduction to Python Programming 2 – Getting Started Josef van Genabith (Stefan Thater) Dept. of Language Science & Technology Universität des Saarlandes SS 2020 The command line • aka terminal, terminal emulator, shell, ... • a special program that you can use to interact with the operating system ‣ start programs ‣ request information about programs ‣ terminate (“kill”) programs ‣ … 2 Hello, World! • Use your favorite text editor to create a file called hello.py containing the following python code. print("Hello, World!") • Open a terminal and go to the same directory where you put the file. You can navigate using the cd command. • Run the program from the command line using the command: ‣ python3 hello.py 3 Integrated Developing Environments IDE • Software tools for programmers • Components: ‣ Source Code Editor ‣ Compiler / Interpreter ‣ Build Automation Tools ‣ Debugger • Facilitates software development 4 Python IDEs • IDLE (comes with Python, simple) • iPython Notebook (easy code-block execution) • PyCharm (full IDE, recommended) • Eclipse (powerful IDE, uses plugins: PyDev) • NetBeans ... • In this course, we introduce IDLE, Notebook and PyCharm. You are free to use any other IDE, but don’t expect us to know everything about them! 5 IDLE 6 IDLE • Click File > New Window. This opens a new source code file. Enter some source code. ‣ e.g. print("Source Code says Hello!") • Save the file as hello.py: File > Save ‣ Make sure to always add “.py” explicitly when saving files! • Syntax Highlighting: shows keywords / strings / ... in different colors. • Click Run > Run Module (F5) ‣ Results of running your source code file will show up in the Python Shell. 7 PyCharm • Start PyCharm. • Create a new project: enter the folder name for your project. • Right-click your new project. → New → Python file → enter hello as the filename. • PyCharm will create a file called hello.py • Enter print("Source Code says Hello!") • Save the file using Ctrl+s • Run your program using Alt+Shift+F10/X 8.

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Introduction to Eclipse and PyDev Fall 2021 Page 1 of 6 Introduction to Eclipse and PyDev We will be using Eclipse PyDev plugin in this course to create and run Python programs. Eclipse is a platform that can be used for application development tasks using different languages, including Java and Python. A separate handout describes how to install Eclipse and its Python plugin - PyDev. This handout will take you through the process of creating and running a Python program. Specifying the Eclipse workspace When you start Eclipse, you will be asked to specify the directory in which to store your projects. By default, on Windows, it creates a folder called eclipse-workspace in your personal folder Use this directory or another of your choice. To switch the workspace to a different folder, after starting Eclipse, go to File > Switch Workspace and select the desired folder. Creating a new PyDev project To create and run a Python program in Eclipse, you must form a project for it: 1. Create a new PyDev Project by selecting File > New > Project>PyDev > PyDev Project. This will open the PyDev Project dialog window (see Error! Reference source not found.) 2. In the dialog window: • Enter a project name of your choice into the Project name field. 3. In the PyDev Project dialog box ( Figure 1), make sure the right interpreter is selected (To make sure python version 3 is selected, click on Configure the interpreter not listed link verifying that the selected interpreter’s location should be within anaconda3 installation, i.e. mention anaconda3 in the path (Figure 2) ) Click on Finish.
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