Prevent Code Errors?

[Matt Tacular]

Here is my code:

# search for a file, and show all files found in that file's directory
# delete them if wanted
 
import os
import pickle
 
def file_find(folder):
    """search for a filename fname starting in folder"""
    for root, dirs, files in os.walk(folder):
        for file in files:
            # make search case insensitive
            if fname.lower() == file.lower():
                return os.path.join(root)
    return None
 
# file to search for ...
fname = raw_input("File? ")
# folder to start search ...
folder = raw_input("Directory? ")
 
result = file_find(folder)
 
if result:
    print "File found -->", result
    print "\n===============================\nFollowing are the files in the same directory\n===============================\n" 
    directory = result

    allfiles = [] #store all files found
    for root,dir,files in os.walk(directory):
            filelist = [ os.path.join(root,fi) for fi in files ] 
            for f in filelist: 
                  allfiles.append(f)
            
    fileAmount = len(allfiles)
            
    for i in allfiles:
            print "file ", i

    print "\n===============================\n"


    counter = 0
    while counter != fileAmount:

        showFile = allfiles[counter]

        counter += 1

        if counter == fileAmount:
            break
        
    deleteFiles = raw_input("Delete whole list? (y/n): ")

    if deleteFiles == "Y" or deleteFiles == "y":

        print "Sure?"
        positive = raw_input("To delete, type: 'delete', to not delete, type anything else... ")
        if positive == "delete" or positive == "Delete":

            counter = 0
            while counter != fileAmount:

                hostageFile = allfiles[counter]

                os.remove(hostageFile)

                counter += 1

                print "deleted",counter,"files..."

                if counter == fileAmount:
                    break
            raw_input("")

        else:
            print "NO files deleted..."
            raw_input("")    

    else:
        print "NO files deleted..."
        raw_input("")
        
else:
    print "File %s not found" % fname
    raw_input("")

But when it is trying to delete a directory with files that wont be easily deleted, it errors and closes.

I would like to add to the code a way to tell it to skip files that don't want to be deleted, and continue deleteing other files.

[sneekula]

Sounds like hard program to play around with. You could really do some damage to files in your hard drive!

[Matt Tacular]

Yes, yes you can. It has a purpose though, my computer teacher likes to mess up the games kids install in the lab, give them a challenge if they want to play, and I made this program which he can use to sometimes delete the map files or whatnot, and since it searches for a file, even if they try to hide the game, that won't help, but sometimes it will error and just stop, I want it to skip the file it can't delete and continue on.

[Matt Tacular]

Is there no way to do this?

[Zonr_0]

I don't have much time, so I can only really post this much. Take a look at Mouche's scheduling program:

def add_address(self):
    try:
        self.address = schedule_data[0][3]
    except IndexError:
        pass
    try:
        self.city = schedule_data[0][4]
    except IndexError:
        pass
    try:
        self.state = schedule_data[0][5]
    except IndexError:
        pass
    try:
        self.zip = schedule_data[0][6]
    except IndexError:
        pass

IndexError can be replaced with whatever type of error you're trying to catch. Hopefully somebody else with more time can explain this more fully. :)

[Mouche]

Here is a list of all the built-in errors to "except" using the try-except statements:
http://www.python.org/doc/2.4.1/lib/module-exceptions.html

But, the easiest thing to do is run your code in a way that you can see the traceback errors. It will say something like "IndexError." Then just write whatever you want to do under the "try:" and then below it write an "except IndexError:", which executes if the code under the "try:" gets an error. Like Zonr said, you replace "IndexError" in my example with whatever error is shown by the traceback errors.

[sneekula]

The module shutil has functions for deleting whole directory trees.