Question

Write a python program to handle data from/to files (open, read/write, delete to handle data). It uses exception handling – try and except to catch and handle exceptions.

Answer 1

 import os def read_file( filename ): print("* We are in reading section "+filename) try: f = open(filename, "r") print(f.read()) f.close() except: print("* something is not working with read files") def write_file(filename): print("* We are in writing section "+filename) try: f = open(filename, "a") content = input("* Enter the content that you would like to add to the file:") f.write(content) f.close() except: print("* something is not working with write files") def delete_file(filename): print("* We are in deleting section "+filename) try: if os.path.exists(filename): os.remove(filename) print("file file is removed") else: print("file doesn't exist") except: print("something is not working with delete files") mode = int(input("* What would you like to do? Press 1 to Read, Press 2 to Write, Press 3 to Delete ")) print("* You chose the mode as : ", mode) filename = input("* Enter the filename: ") print("* You mentioned the filename as : "+filename) if (mode == 1): read_file(filename) elif (mode == 2): write_file(filename) elif (mode == 3): delete_file(filename) else: print("* this is not a valid option, please try again") 

Raw Code:

import os

def read_file( filename ):

    print("* We are in reading section "+filename)

    try:

        f = open(filename, "r")

        print(f.read())

        f.close()

    except:

        print("* something is not working with read files")

def write_file(filename):

    print("* We are in writing section "+filename)

    try:

        f = open(filename, "a")

        content = input("* Enter the content that you would like to add to the file:")

        f.write(content)

        f.close()

    except:

        print("* something is not working with write files")

def delete_file(filename):

    print("* We are in deleting section "+filename)

    try:

        if os.path.exists(filename):

            os.remove(filename)

            print("file file is removed")

        else:

            print("file doesn't exist")

    except:

        print("something is not working with delete files")

mode = int(input("* What would you like to do? Press 1 to Read, Press 2 to Write, Press 3 to Delete "))

print("* You chose the mode as : ", mode)

filename = input("* Enter the filename: ")

print("* You mentioned the filename as : "+filename)

if (mode == 1):

    read_file(filename)

elif (mode == 2):

    write_file(filename)

elif (mode == 3):

    delete_file(filename)

else:

    print("* this is not a valid option, please try again")

    

Output

PS C:\Users\ e\Desktop\newpro> python . \python_content.py * What would you like to do? Press 1 to Read, Press 2 to Write, Press 3 to Delete 1 * You chose the mode as : 1 * Enter the filename: newfile.txt * We are in reading section newfile.txt content of the file is PS C:\Usersla =\Desktop\newpro> python . \python_content.py * What would you like to do? Press 1 to Read, Press 2 to Write, Press 3 to Delete 2 * You chose the mode as : 2 * Enter the filename: newfile.txt * We are in writing section newfile.txt * Enter the content that you would like to add to the file:This new content we have added to the fi PS C:\Users a\Desktop\newpro> python . \python_content.py * What would you like to do? Press 1 to Read, Press 2 to Write, Press 3 to Delete 1 * You chose the mode as : 1 * You mentioned the filename as : newfile.txt * We are in reading section newfile.txt content of the file is this new content we have added to the file

PS C:\Users \Desktop\newpro> python . \python_content.py * What would you like to do? Press 1 to Read, Press 2 to Write, Press 3 to Delete 3 * You chose the mode as : 3 * Enter the filename: newfile.txt * You mentioned the filename as : newfile.txt * We are in deleting section newfile.txt

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