combine usage

.gitignore

@@ -1 +1,2 @@
-rename.sh
+*__pycache__*
+test.*

README.md

@@ -463,49 +463,17 @@ Based on the aforementioned original dataset, after data processing, we construc
 | Total duration(s) | `2851.6933333333354` | `3247.941395833335` | `3247.941395833335` |
 
 ## Usage
-### Default Subset
 ```python
 from datasets import load_dataset
 
-ds = load_dataset("ccmusic-database/pianos", name="default")
-for item in ds["train"]:
-    print(item)
-
-for item in ds["validation"]:
-    print(item)
-
-for item in ds["test"]:
-    print(item)
-```
-
-### 8-class Subset
-```python
-from datasets import load_dataset
-
-ds = load_dataset("ccmusic-database/pianos", name="8_class")
-for item in ds["train"]:
-    print(item)
-
-for item in ds["validation"]:
-    print(item)
-
-for item in ds["test"]:
-    print(item)
-```
-
-### Eval Subset
-```python
-from datasets import load_dataset
-# 8-class label
-ds = load_dataset("ccmusic-database/pianos", name="eval")
-for item in ds["train"]:
-    print(item)
-
-for item in ds["validation"]:
-    print(item)
-
-for item in ds["test"]:
-    print(item)
+ds = load_dataset(
+    "ccmusic-database/pianos",
+    name="default",  # default / 8_class / eval
+    split="train",  # train / validation / test
+    cache_dir="./__pycache__",
+)
+for i in ds:
+    print(i)
 ```
 
 ## Maintenance