PYTHON PROGRAMMING:

(Tkinter: Count the occurrences of each letter) Revise the preceding exercise to display a histogram for the result, as shown in Figure 14.6. You need to display a message in a message box if the URL does not exist. 76 Occurrence of letters in a Histogram from URL a z b c d e f g h i j k l m n o p q r Enter a URL: http://cs.armstrong.edu/Tiang/data/Lincoln.tid s t u v w x y Show Result FIGURE 14.6 The program lets the user enter a URL for a file and displays the occurrence counts of the letters in a histogram. (Tkinter: Count the occurrences of each letter) Revise the preceding exercise to display a histogram for the result, as shown in Figure 14.6. You need to display a message in a message box if the URL does not exist. 76 Occurrence of letters in a Histogram from URL a z b c d e f g h i j k l m n o p q r Enter a URL: http://cs.armstrong.edu/Tiang/data/Lincoln.tid s t u v w x y Show Result FIGURE 14.6 The program lets the user enter a URL for a file and displays the occurrence counts of the letters in a histogram