import os def process_dir(p, indent): for item in os.listdir(path): if os.path.isfile("{0}/{1}".format(path, item)): print("\t"*indent, item) elif os.path.isdir("{0}/{1}".format(path,...

import os

 
def process_dir(p, indent):
    for item in os.listdir(path): 
        if os.path.isfile("{0}/{1}".format(path, item)):
            print("\t"*indent, item)
        elif os.path.isdir("{0}/{1}".format(path, item)):
            print("\t"*indent, "\x1b[1;31m{}\x1b[0;0m".format(item))
            process_dir("{0}/{1}".format(path, item), indent+1)
        else:
            print("Not a file or directory")

path=input("Enter a valid system path: ")
print("\x1b[1;31m{}\x1b[0;0m".format(path))
process_dir(path, 1)

1. Figure out what the program is trying to do.
1. Add meaningful comments that tell what the program is doing.
2. There is a bug in this program that causes it to work incorrectly; find the bug, and fix it
c. Put in some error detection code so that the program will not be able to crash

Expert Solution

import os

 
def process_dir(p, indent):
    for item in os.listdir(p): 
        if os.path.isfile("{0}/{1}".format(p, item)):
            print("\t"*indent, item)
        elif os.path.isdir("{0}/{1}".format(p, item)):
            print("\t"*indent, "\x1b[1;31m{}\x1b[0;0m".format(item))
            process_dir("{0}/{1}".format(p, item), indent+1)
        else:
            print("Not a file or directory")

path=input("Enter a valid system path: ")
print("\x1b[1;31m{}\x1b[0;0m".format(path))
process_dir(path, 1)

1. The program is trying to print all the files in a given path by going through all the subdirectories of that location.

2. The error was that inside the function we were using "path" which is declared outside and already has a value of original path which causes the program to recursively call the same path again and again thus causing it to crash.

Instead of that I just used the local path "p" of the directory.

3. Error detection:

import os

 
def process_dir(p, indent):
        try:
            for item in os.listdir(p): 
                if os.path.isfile("{0}/{1}".format(p, item)):
                    print("\t"*indent, item)
                elif os.path.isdir("{0}/{1}".format(p, item)):
                    print("\t"*indent, "\x1b[1;31m{}\x1b[0;0m".format(item))
                    process_dir("{0}/{1}".format(p, item), indent+1)
                else:
                    print("Not a file or directory")
        except Exception as e:
                print("The program exited with the following message:\n"+str(e))

path=input("Enter a valid system path: ")
print("\x1b[1;31m{}\x1b[0;0m".format(path))
process_dir(path, 1)

venereology answered 2 months ago

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