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12.10 LAB: Working with Files This exercise is designed to give you experience looping over files and making decisions based on their contents. The program asks the user for three pieces of information • A text file to open A letter to search for • A position to look in The program counts how many words have the given character in the correct position. For example, the previous sentence contains 5 words with 'o' in position 1. Your program must check for errors. If an error is encountered, call sys.exit(0) after printing a message. If the file cannot be opened, then print an error. (Hint: Use a try/except with OSError) Welcome to Book Analyzer v0.1 Enter File Name to Read: fake_name.txt Error: Could Not Open File. Print an error if something other then a single letter is given to search for Enter File Name to Read: modest.txt Letter to search for: A Bad Input Error: A single letter is required. Print an error if the third input is not a number. Welcome to Book Analyzer v0.1 Enter File Name to Read: modest.txt Letter to search for: Enter Position (0 for first letter): Two Error: A number is required. If all inputs are good, then you can read the file. Get each word out of the file and check it against the inputs. Count how many words appear with the character given in the correct location. Welcome to Book Analyzer v0.1 Enter File Name to Read: modest.txt Letter to search for: Enter Position (0 for first letter): 1 There are 853 words with h in position 1 You should count both the upper and lower case versions of a letter. If the user enters a, then mean count both A and a. You can use str_var lower() to make a string lowercase. The two files are: modest.txt and poe.txt

12.10 LAB: Working with Files This exercise is designed to give you experience looping over files and making decisions based on their contents. The program asks the user for three pieces of information • A text file to open A letter to search for • A position to look in The program counts how many words have the given character in the correct position. For example, the previous sentence contains 5 words with 'o' in position 1. Your program must check for errors. If an error is encountered, call sys.exit(0) after printing a message. If the file cannot be opened, then print an error. (Hint: Use a try/except with OSError) Welcome to Book Analyzer v0.1 Enter File Name to Read: fake_name.txt Error: Could Not Open File. Print an error if something other then a single letter is given to search for Enter File Name to Read: modest.txt Letter to search for: A Bad Input Error: A single letter is required. Print an error if the third input is not a number. Welcome to Book Analyzer v0.1 Enter File Name to Read: modest.txt Letter to search for: Enter Position (0 for first letter): Two Error: A number is required. If all inputs are good, then you can read the file. Get each word out of the file and check it against the inputs. Count how many words appear with the character given in the correct location. Welcome to Book Analyzer v0.1 Enter File Name to Read: modest.txt Letter to search for: Enter Position (0 for first letter): 1 There are 853 words with h in position 1 You should count both the upper and lower case versions of a letter. If the user enters a, then mean count both A and a. You can use str_var lower() to make a string lowercase. The two files are: modest.txt and poe.txt

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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12.10 LAB: Working with Files This exercise is designed to give you experience looping over files and making decisions based on their contents. The program asks the user for three pieces of information. • A text file to open • A letter to search for • A position to look in The program counts how many words have the given character in the correct position. For example, the previous sentence contains 5 words with 'o' in position 1. Your program must check for errors. If an error is encountered, call sys.exit(0) after printing a message. If the file cannot be opened, then print an error. (Hint: Use a try/except with OSError) Welcome to Book Analyzer v0.1 Enter File Name to Read: fake_name.txt Error: Could Not Open File. Print an error if something other then a single letter is given to search for. Enter File Name to Read: modest.txt Letter to search for: A Bad Input Error: A single letter is required. Print an error if the third input is not a number. Welcome to Book Analyzer v0.1 Enter File Name to Read: modest.txt Letter to search for: a Enter Position (0 for first letter): Two Error: A number is required. If all inputs are good, then you can read the file. Get each word out of the file and check it against the inputs. Count how many words appear with the character given in the correct location. Welcome to Book Analyzer v0.1 Enter File Name to Read: modest.txt Letter to search for: h Enter Position (0 for first letter): 1 There are 853 words with h in position 1 You should count both the upper and lower case versions of a letter. If the user enters a, then mean count both A and a. You can use str_var.lower() to make a string lowercase. The two files are: modest.txt and poe.txt 459058.3161708.qx3zqy7
Transcribed Image Text:12.10 LAB: Working with Files This exercise is designed to give you experience looping over files and making decisions based on their contents. The program asks the user for three pieces of information. • A text file to open • A letter to search for • A position to look in The program counts how many words have the given character in the correct position. For example, the previous sentence contains 5 words with 'o' in position 1. Your program must check for errors. If an error is encountered, call sys.exit(0) after printing a message. If the file cannot be opened, then print an error. (Hint: Use a try/except with OSError) Welcome to Book Analyzer v0.1 Enter File Name to Read: fake_name.txt Error: Could Not Open File. Print an error if something other then a single letter is given to search for. Enter File Name to Read: modest.txt Letter to search for: A Bad Input Error: A single letter is required. Print an error if the third input is not a number. Welcome to Book Analyzer v0.1 Enter File Name to Read: modest.txt Letter to search for: a Enter Position (0 for first letter): Two Error: A number is required. If all inputs are good, then you can read the file. Get each word out of the file and check it against the inputs. Count how many words appear with the character given in the correct location. Welcome to Book Analyzer v0.1 Enter File Name to Read: modest.txt Letter to search for: h Enter Position (0 for first letter): 1 There are 853 words with h in position 1 You should count both the upper and lower case versions of a letter. If the user enters a, then mean count both A and a. You can use str_var.lower() to make a string lowercase. The two files are: modest.txt and poe.txt 459058.3161708.qx3zqy7
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