Different Path objects may point to the same file

[airallergy]

@santoshphilip, it is great that eppy starts to support Path objects at some point! One issue I found is that the comparison (==) of two Path objects does not link to the actual files. For instance, Path("/Applications/EnergyPlus-23-1-0/Energy+.idd") == Path("ep23.1/Energy+.idd") will give False, though ep23.1 is a symbolic link to /Applications/EnergyPlus-23-1-0. I am not sure if many would come across this issue (having to deal with different Path objects that point to the same file), but the fix should be fairly simple, just resolving the path at the beginning of the setiddname function.

if isinstance(iddname, Path):
    iddname = iddname.resolve(strict=True)

For reference, the resolve() method of Path objects will 1. make paths absolute and 2. resolve any symlinks.

If this looks good to you, I can send in a quick PR. One thing to consider is whether to set strict=True. This might not be desired if you think it is better to handle file non-existence later on, together with paths that are passed in as str (I did not check where that is, but I assume there is one, or maybe you just give it to open() to throw exceptions)