Cleaner code, it works pretty fine

Program/app.py

@@ -0,0 +1,158 @@
+import os
+import shutil
+from pathlib import Path
+from mutagen.id3 import ID3, TBPM, ID3NoHeaderError
+from datetime import datetime
+from collections import defaultdict
+import configparser
+import sys
+import librosa
+
+GROUP_SIZE = 5
+
+def load_config():
+    config_path = Path("config.ini")
+    default_config_path = Path("def_config.ini")
+
+    if not config_path.exists():
+        if default_config_path.exists():
+            shutil.copy(default_config_path, config_path)
+            print("config.ini created from def_config.ini with default settings.")
+        else:
+            print("Error: def_config.ini not found! Please create it and rerun.")
+            sys.exit(1)
+
+    default_config = configparser.ConfigParser()
+    default_config.read(default_config_path)
+
+    user_config = configparser.ConfigParser()
+    user_config.read(config_path)
+
+    merged_config = configparser.ConfigParser()
+    merged_config.read_dict(default_config)
+    merged_config.read_dict(user_config)
+
+    return merged_config
+
+def analyze_bpm_librosa(file_path):
+    try:
+        y, sr = librosa.load(file_path, mono=True)
+        tempo, _ = librosa.beat.beat_track(y=y, sr=sr)
+        return int(round(float(tempo)))
+    except Exception as e:
+        print(f"Error analyzing BPM for {file_path.name}: {e}")
+        return None
+
+def write_bpm_tag(file_path, bpm):
+    try:
+        try:
+            tags = ID3(file_path)
+        except ID3NoHeaderError:
+            tags = ID3()
+
+        tags.delall("TBPM")
+        tags.add(TBPM(encoding=3, text=str(bpm)))
+        tags.save(file_path)
+        print(f"Written BPM={bpm} to {file_path.name}")
+    except Exception as e:
+        print(f"Failed to write BPM tag for {file_path.name}: {e}")
+
+def get_bpm(file_path):
+    try:
+        tags = ID3(file_path)
+        bpm_tag = tags.get("TBPM")
+        if bpm_tag:
+            return int(float(bpm_tag.text[0]))
+    except Exception:
+        pass
+    return None
+
+def split_evenly(lst, n):
+    k, m = divmod(len(lst), n)
+    return [lst[i*k + min(i, m):(i+1)*k + min(i+1, m)] for i in range(n)]
+
+def main():
+    config = load_config()
+
+    CD_SIZE = config.getint("Settings", "SplitFolderMB") * 1024 * 1024
+    bWriteNonPresentBPM = config.getboolean("Settings", "bWriteNonPresentBPM")
+    bCheckAllTracksBPM = config.getboolean("Settings", "bCheckAllTracksBPM")
+
+    run_date = datetime.now().strftime("%Y-%m-%d_%H%M%S")
+
+    source_input = input("Drag and drop your music folder here, then press Enter: ").strip().strip('"')
+    source_media_path = Path(source_input)
+
+    if not source_media_path.exists() or not source_media_path.is_dir():
+        print(f"Error: {source_media_path} is not a valid directory.")
+        sys.exit(1)
+
+    all_tracks = []
+    for file in source_media_path.rglob("*.mp3"):
+        bpm = get_bpm(file)
+
+        if bpm is None and bWriteNonPresentBPM:
+            bpm = analyze_bpm_librosa(file)
+            if bpm is not None:
+                write_bpm_tag(file, bpm)
+
+        elif bpm is not None and bCheckAllTracksBPM:
+            new_bpm = analyze_bpm_librosa(file)
+            if new_bpm is not None and new_bpm != bpm:
+                bpm = new_bpm
+                write_bpm_tag(file, bpm)
+
+        size = file.stat().st_size
+        if bpm is None:
+            bpm_range = "[Unknown BPM]"
+        else:
+            bpm_range = f"{(bpm // GROUP_SIZE) * GROUP_SIZE}-to-{((bpm // GROUP_SIZE) * GROUP_SIZE) + GROUP_SIZE - 1}"
+        all_tracks.append({"file": file, "size": size, "bpm_range": bpm_range})
+
+    if not all_tracks:
+        print("No MP3 files found.")
+        sys.exit(0)
+
+    parent = source_media_path.parent
+    folder_name = source_media_path.name
+    dest_media_path = parent / f"[CDs-{run_date}]{folder_name}"
+    dest_media_path.mkdir(parents=True, exist_ok=True)
+
+    total_size = sum(t["size"] for t in all_tracks)
+    num_cds = max(1, (total_size + CD_SIZE - 1) // CD_SIZE)
+
+    print(f"Total size: {total_size / 1024**2:.2f} MB, splitting into {num_cds} CDs")
+
+    bpm_groups = defaultdict(list)
+    for track in all_tracks:
+        bpm_groups[track["bpm_range"]].append(track)
+
+    for bpm_range in bpm_groups:
+        bpm_groups[bpm_range].sort(key=lambda x: x["file"].name)
+
+    bpm_chunks = {}
+    for bpm_range, tracks in bpm_groups.items():
+        bpm_chunks[bpm_range] = split_evenly(tracks, num_cds)
+
+    cd_contents = [[] for _ in range(num_cds)]
+
+    for bpm_range in bpm_chunks:
+        for i, chunk in enumerate(bpm_chunks[bpm_range]):
+            cd_contents[i].extend(chunk)
+
+    for i, tracks in enumerate(cd_contents, start=1):
+        cd_folder = dest_media_path / f"CD-{i:02}"
+        cd_folder.mkdir(parents=True, exist_ok=True)
+        size_accum = 0
+        for track in tracks:
+            bpm_subfolder = cd_folder / track["bpm_range"]
+            bpm_subfolder.mkdir(parents=True, exist_ok=True)
+            shutil.copy(track["file"], bpm_subfolder / track["file"].name)
+            size_accum += track["size"]
+        print(f"[WRITE] CD-{i:02}: {len(tracks)} tracks, approx {size_accum / 1024**2:.2f} MB")
+
+    print("\n✓ Done!")
+
+if __name__ == "__main__":
+    main()
+

Program/def_config.ini

@@ -0,0 +1,4 @@
+[Settings]
+bWriteNonPresentBPM = False
+bCheckAllTracksBPM = False
+SplitFolderMB = 695