seed: curriculum content

1.solar-system/3.strings/03.the-methods/starter/starter.py

@@ -0,0 +1,15 @@
+def transform(s):
+    """Apply three string transformations and return them in a dict.
+
+    Keys:
+      "upper" — s.upper()
+      "lower" — s.lower()
+      "clean" — s stripped of leading/trailing whitespace,
+                lowercased, with spaces replaced by underscores
+
+    transform("  Hello World  ") returns:
+      {"upper": "  HELLO WORLD  ",
+       "lower": "  hello world  ",
+       "clean": "hello_world"}
+    """
+    pass