It looks like you’re 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.