Fix adding header to text

README.md

@@ -43,10 +43,10 @@ dataset_info:
     dtype: string
   splits:
   - name: train
-    num_bytes: 955323858
+    num_bytes: 973765964
     num_examples: 188297
   download_size: 75369951
-  dataset_size: 955323858
+  dataset_size: 973765964
 - config_name: all
   features:
   - name: file

guitar_tab.py

@@ -165,7 +165,7 @@ class Example:
 
 
 class Builder(datasets.GeneratorBasedBuilder):
-    VERSION = datasets.Version("1.4.0")
+    VERSION = datasets.Version("1.4.1")
 
     def _info(self):
         return datasets.DatasetInfo(
@@ -212,7 +212,7 @@ def _parse_examples(tex: str) -> List[Example]:
     examples = []
     data = {}
 
-    def _parse_track_header(k, v):
+    def _parse_track_header_line(k, v):
         if k == "instrument":
             data['instrument_name'] = INSTRUMENT_MAP.get(int(v), "unknown")
             data['instrument_number'] = int(v)
@@ -222,9 +222,9 @@ def _parse_examples(tex: str) -> List[Example]:
             data['frets'] = int(v)
 
     lines = (l_.strip() for l_ in tex.splitlines() if l_.strip())
-    header_lines = list(itertools.takewhile(lambda l: l != ".", lines))
+    song_header_lines = list(itertools.takewhile(lambda l: l != ".", lines))
 
-    for line in header_lines:
+    for line in song_header_lines:
         assert line.startswith("\\")
         line = line.lstrip("\\")
         kv = line.split(" ", 1)
@@ -243,23 +243,27 @@ def _parse_examples(tex: str) -> List[Example]:
         elif k == "tempo":
             data['tempo'] = int(v)
         else:
-            _parse_track_header(k, v)
+            _parse_track_header_line(k, v)
 
     track_header_lines = []
     track_tex_lines = []
 
-    def _add_example():
+    def _new_example():
         nonlocal data, track_header_lines, track_tex_lines
-        if track_tex_lines:
-            data['track_number'] = (track_number := len(examples) + 1)
-            data['track_name'] = v if v else f"Track {track_number}"
-            data['text'] = (
-                '\n'.join(track_header_lines + [" ".join(track_tex_lines)])
+        data['track_number'] = (track_number := len(examples) + 1)
+        data['track_name'] = v if v else f"Track {track_number}"
+        data['text'] = (
+            '\n'.join(
+                song_header_lines +
+                ["."] +
+                track_header_lines +
+                [" ".join(track_tex_lines)]
             )
-            examples.append(Example(**data))
-            data = {}
-            track_header_lines = []
-            track_tex_lines = []
+        )
+        examples.append(Example(**data))
+        data = {}
+        track_header_lines = []
+        track_tex_lines = []
 
     for line in lines:
         if line.startswith("\\"):
@@ -270,10 +274,13 @@ def _parse_examples(tex: str) -> List[Example]:
                 k = kv[0]
                 v = None
             if k == "track":
-                _add_example()
+                if track_tex_lines:
+                    _new_example()
             else:
-                _parse_track_header(k, v)
+                _parse_track_header_line(k, v)
+            track_header_lines.append(line)
         else:
             track_tex_lines.append(line)
-    _add_example()
+    if track_tex_lines:
+        _new_example()
     return [t for t in examples if t.text]