Few Error handling Items for Bitmap Collage and Zero-Byte files.

[ghost]

Adding Exceptions for bitmap collage if not enough files are present with default -WIDTH of 64

            try:
                c_bmp = b"" if not self.pal else self.PALETTE
                if self.btype == self.BIN_CONTAINER:
                    collage_builder = (lambda x, a=self, PAD=len(pad), WIDTH=list(range(w // 64)): b''.join([b''.join([a.bmps[a.STRIPE_WIDTH*(x+1)-1-k][64*PAD*j:64*PAD*(j+1)] for k in WIDTH]) for j in range(64)]))
                else:
                    collage_builder = (lambda x, a=self, PAD=len(pad), WIDTH=list(range(w // 64)): b''.join([b''.join([a.bmps[a.STRIPE_WIDTH*x+k][64*PAD*j:64*PAD*(j+1)] for k in WIDTH]) for j in range(64)]))
                c_bmp += b''.join(map(collage_builder, list(range(h//64))))
                self.b_write(os.path.join(dname, "%s_collage.bmp" % (self.fname)), self.b_export_bmp(w, h, c_bmp))
                self.b_log(sys.stdout, False, 0, "Successfully exported collage file.")
            except IndexError as ie:
                self.b_log(sys.stdout, False, 1, "Not enough files to build collage with default collage -WIDTH of 64")
               
            try:
                c_bmp = b"" if not self.pal else self.PALETTE
                if self.btype == self.BIN_CONTAINER:
                    collage_builder = (lambda x, a=self, PAD=len(pad), WIDTH=list(range(w // 64)): b''.join([b''.join([a.bmps[a.STRIPE_WIDTH*(x+1)-1-k][64*PAD*j:64*PAD*(j+1)] for k in WIDTH]) for j in range(64)]))
                else:
                    collage_builder = (lambda x, a=self, PAD=len(pad), WIDTH=list(range(w // 64)): b''.join([b''.join([a.bmps[a.STRIPE_WIDTH*x+k][64*PAD*j:64*PAD*(j+1)] for k in WIDTH]) for j in range(64)]))
                c_bmp += b''.join(map(collage_builder, list(range(h//64))))
                self.b_write(os.path.join(dname, "%s_collage.bmp" % (self.fname)), self.b_export_bmp(w, h, c_bmp))
                self.b_log(sys.stdout, False, 0, "Successfully exported collage file.")
            except IndexError as ie:
                self.b_log(sys.stdout, False, 1, "Not enough files to build collage with default collage -WIDTH of 64")

Add in an exception and skip for zero byte files in Argparse Options:

    # Process all files in a directory
    elif os.path.isdir(args.src):
        sys.stdout.write("[+++] Processing a directory...%s" % (os.linesep))
        src_files = []
        for root, dirs, files in os.walk(args.src):
            for f in files:
                if f.rsplit(".", 1)[-1].upper() in ["BIN", "BMC"]:
                    file_path = os.path.join(root, f)
                    file_size = os.path.getsize(file_path)
                    if file_size > 0:
                        if args.verbose:
                            sys.stdout.write("[---] File '%s' has been found.%s" % (file_path, os.linesep))
                        src_files.append(os.path.join(root, f))
                    else:
                        sys.stdout.write("[!!!] File '%s' is zero bytes, skipping file.%s" % (file_path, os.linesep))
        if len(src_files) == 0:
            sys.stderr.write("No suitable files were found under '%s' directory.%s" % (args.src, os.linesep))
            exit(-1)

    # Process a single file
    elif not os.path.isfile(args.src):
        sys.stderr.write("Invalid -s/--src parameter; use -h/--help for help.%s" % (os.linesep))
        exit(-1)
    else:
        file_size = os.path.getsize(args.src)
        if file_size > 0:
            sys.stdout.write("[+++] Processing a single file: '%s'.%s" % (args.src, os.linesep))
            src_files = [args.src]
        else:
            sys.stdout.write("[!!!] File '%s' is Zero-Bytes.%s" % (args.src, os.linesep))
    # Import, process, export, and flush each file
    print("[+++] Files for processing:", str(src_files))