fix printing and add option to hide unused instruments

stt.py

@@ -42,9 +42,10 @@ def commandline():
     # option without argument via 'store_true'
     parser.add_argument("-V", "--version", help="show program version", action="store_true")
     # option with argument
-    parser.add_argument("--width", "-w", help="set output width in measures")
+    parser.add_argument("--width", "-w", help="set output width in measures (default: 2)")
     parser.add_argument("--input", "-i", help="set input file")
     parser.add_argument("--url", "-u", help="set input url")
+    parser.add_argument("--exclude", "-x", help="exclude unused instruments", action="store_true")
 
     # read arguments from the command line
     args = parser.parse_args()
@@ -56,6 +57,8 @@ def commandline():
     # check for --width
     if args.width:
         print("set output width to %s" % args.width)
+    else:
+        args.width = 2
     if args.url:
         print("url not handled yet %s" % args.width)
     if args.input and args.url:
@@ -108,6 +111,18 @@ def parse_instruments(jsondata):
 # That'll make for easy printing
 
 
+    used_instr = {
+        "Cr": False,
+        "Hh": False,
+        "Ri": False,
+        "HT": False,
+        "MT": False,
+        "Sn": False,
+        "FT": False,
+        "Bd": False,
+        "Hf": False
+    }
+
     instruments = {
         "Cr": [],
         "Hh": [],
@@ -145,17 +160,30 @@ def parse_instruments(jsondata):
                     #print(measurecnt, inst, count)
                     if inst != None:
                         instruments[inst][-1][count] = marker
+                        used_instr[inst] = True
                     else:
                         print("Unhandled: " + note + " in measure " + str(measurecnt+1))
                         print("Add: " + str(( note["string"] * 1000 ) + note["fret"]) + " to lookuptable")
             count += skip
 
-    return instruments
+    return instruments, used_instr
 
-def print_instruments(instruments):
+def print_instruments(instruments, used_instr):
+    measuresnr = len(instruments["Cr"])
+    width = int(args.width)
+
+    rows = ( measuresnr / width )
+    count = 0
+    while count < measuresnr:
         for instr in ["Cr", "Hh", "Ri", "HT", "MT", "Sn", "FT", "Bd", "Hf"]:
-        for i in range(len(instruments["Cr"])):
-            print(instr + " " + "".join(instruments[instr][i]))
+            if not args.exclude or used_instr[instr]:
+                sys.stdout.write(instr + " |")
+                for i in range(count, count+width):
+                    if i < measuresnr:
+                        sys.stdout.write("".join(instruments[instr][i]) + "|")
+                print("")
+        print("")
+        count += width
 
 args = commandline()
 
@@ -165,6 +193,5 @@ with open(args.input, 'r') as content_file:
 jsondata = get_json(content)
 print_meta(jsondata)
 
-instr = parse_instruments(jsondata)
-print_instruments(instr)
-
+instr, used_instr = parse_instruments(jsondata)
+print_instruments(instr, used_instr)