Python Programming for Raspberry Pi, Sams Teach Yourself in 24 Hours

4: 5: Please enter the divisor: 4 6: 7: The result is: 0.75 8: pi@raspberrypi ~ $ 9: pi@raspberrypi ~ $ python3 py3prog/script17 ...

Click here to view code image 1: pi@raspberrypi ~ $ cat py3prog/script1702.py 2: # script1702 - Properly handle Division Errors ...

1: pi@raspberrypi ~ $ python3 py3prog/script1702.py 2: 3: Please enter number to divide: 3 4: 5: Please enter the divisor: 4 6: ...

4: # 5: ##################################################### 6: # 7: ################## Functions ######################## 8: # ...

However, when an exception is raised, Python looks at the except statements within the try except statement block in the order i ...

Please enter number to divide: 3 Please enter the divisor: ^C Script terminating.... pi@raspberrypi ~ $ The final three tests on ...

Click here to view code image else: print () print ("Data entered successfully") The optional finally statement is located at th ...

Type all the information from script1704.py shown below. Take your time and avoid any typographical errors: Click here to view ...

Enter. At the Please enter file to open: prompt, type testfile and press Enter. This should complete successfully, and you shoul ...

the as variable statement into the variable open_error, an exception must be named. Using the overall base group Exception means ...

Please enter file to open: nofile File nofile not found Script terminating... pi@raspberrypi ~ $ Open the script1704.py script ...

traceback messages that are displayed in the various listings. What kind of try except statement blocks would you write for each ...

often desirable for each exception to have its own except statement block. exception; traceback Answer b is correct. A final ...

Part IV: Graphical Programming HOUR 18 GUI Programming HOUR 19 Game Programming ...

Hour 18. GUI Programming What You’ll Learn in This Hour: The basics of GUI programming GUI Python libraries Exploring the tkinte ...

TABLE 18.1 Window Widgets Each widget has its own set of properties that define how it appears in the program window and how to ...

A lot of people have worked hard to simplify GUI programming in the Python environment. Standard library packages help you creat ...

root.title('This is a test window') root.geometry('300x100') After you set these methods, you need to use the mainloop() method, ...

FIGURE 18.1 A default Tk window with no widgets. Congratulations! You’ve just written a Python GUI program! There aren’t any wid ...

window. LISTING 18.2 The script1802.py File Click here to view code image #!/usr/bin/python3 from tkinter import * class Applica ...