some changing

test4.py

@@ -0,0 +1,19 @@
+from os import walk
+
+f = []
+print(f'{f}\n----------------')
+for filenames in walk('audio'):
+    f.extend(filenames)
+    break
+print(f'{f}\n----------------')
+
+
+f = f[2]
+
+print(f)
+print(type(f))
+
+i = 100
+print(i)
+i = i * 4
+print(i)