file – Python – IOError: [Errno 13] Permission denied:

file – Python – IOError: [Errno 13] Permission denied:

Just Close the opened file where you are going to write.

It looks like youre trying to replace the extension with the following code:

if (myFile[-4:] == .asm):
    newFile = myFile[:4]+.hack

However, you appear to have the array indexes mixed up. Try the following:

if (myFile[-4:] == .asm):
    newFile = myFile[:-4]+.hack

Note the use of -4 instead of just 4 in the second line of code. This explains why your program is trying to create /Use.hack, which is the first four characters of your file name (/Use), with .hack appended to it.

file – Python – IOError: [Errno 13] Permission denied:

You dont have sufficient permissions to write to the root directory. See the leading slash on the filename?