Problem 1
What happens if you try to open a file for reading that doesn't exist? What happens if you try to open a file for writing that doesn't exist?
Problem 1
Write a program that carries out the following tasks: Open a file with the name hello.txt. Store the message "Hello, Worlal" in the file. Close the filie. Open the same file again. Read the message into a striwe variable and print it.
Problem 2
What happens if you try to open a file for writing, but the file or device is writeprotected (sometimes called read-only)? Try it out with a short test program.
Problem 4
If a program Woozle is started with the command python woozle.py -0nane=piglet - Ieeyore -v heff.txt a.txt lunp.txt what are the values of argv[0], argv [1], and so on?
Problem 4
Write a program that reads a file containing two columns of floating-point numbers. Prompt the user for the file name. Print the average of each column.
Problem 5
What is the difference between raising an exception and handling an exception?
Problem 5
Write a program that asks the user for a file name and prints the number of characters, words, and lines in that file.
Problem 6
Write a program find. py that searches all files specified on the command line and prints out all lines containing a specified word. For example, if you call python find.py ring report.txt address.txt honework.py then the program might print report. txt: has broken up an international ring of DVD bootleggers that address.tut: Kris Kringle, North Pole address. txt: Homer Sinpson, Springfield honework.py: string = "text" The specificd word is always the first command line argument.
Problem 7
Write a program that checks the spelling of all words in a file. It should read cach word of a file and check whether it is contained in a word list. A word list is available on most Linux systems in the file /usr/share/dict/words. (If you don't have access to a Linux system, your instructor should be able to get you a copy.) The program should print out all words that it cannot find in the word list.
Problem 7
What happens if an exception does not have a matching except clause?
