Python Installation and PyCharm Basics Joan Boone - - PowerPoint PPT Presentation

Python Installation and PyCharm Basics

Joan Boone

jpboone@email.unc.edu

Fall 2019

INLS 560

Programming for Information Professionals

Download Python Interpreter

Go to the Python downloads page and select the version for your operating system (Windows, Mac, Linux)

Install Python Interpreter

• Select the downloaded file to start the installation.
• Important! Remember the directory where Python is installed

– 'Install Now' picks a default directory – 'Customize installation' lets you specify the directory location

If installation is successful, you should see this message

Install PyCharm

Go to PyCharm download page and select the FREE Community Edition

Install PyCharm

Run the installation program

Install PyCharm

Using PyCharm: Create a project

Using PyCharm: Create a project

• First, using File Explorer (Windows), or Finder (Mac), create a directory for

your projects, e.g., PyCharm_Projects

• Name your project, e.g., INLS560
• Specify the Python Interpreter you will use for your projects

Click to navigate to interpreter location

Specify the Python interpreter to use

• Select System Interpreter
• Ensure that the Interpreter field refers to the Python interpreter

that you just installed. Click OK.

Click to navigate to interpreter location

Using PyCharm: Create a project

Initial project structure for INLS560

• Folder for your project
• Folder with External Libraries

Create a Python Program

• Select INLS560, and

right-click for the context menu

• Select New > Python

File, and enter HelloWorld as file name

Create and run your program

• Enter print(“Hello World!”) in the Editor
• Select HelloWorld.py and select Run from context menu; or, select Run icon
• Output is displayed in the Run Window in the bottom pane

Default Window Layout

• View > Tool Windows to modify layout
• Window > Restore Default Layout to restore original, default layout

Project View Tool Window Editor

Using PyCharm Debugger (OPTIONAL)

PyCharm documentation on Debugging

Steps to debug your program

• Set breakpoints in your code. A breakpoint is associated with a

statement in your program. When your program runs in debug mode, the debugger will pause when the statement is reached so you can examine program data

– You set breakpoints by clicking in the left gutter area next to the

statement that you want to pause at when the program is running.

– You can toggle the breakpoint on/off by clicking the red circle in

the gutter area.

• Run your program using the debugger
• Examine program data in Variables pane
• You can execute your program step-by-step (line at a time), or

resume execution so it runs until the next breakpoint

Using the PyCharm Debugger

# 1 Set a breakpoint by clicking in left margin # 2 Run debugger # 3 Examine program variables # 4 Resume execution until the next breakpoint is reached 'Step Over' (or line by line) execution (optional)