seed: curriculum content

1.solar-system/3.strings/02.the-slicer/index.md

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+---
+type: challenge
+title: "The Slicer"
+xp: 50
+duration: 25
+difficulty: 2
+---
+
+# The Slicer
+
+> **[INCOMING — Mission Control, Earth]**
+>
+> Cadet, *slicing* grabs a chunk of a string instead of one character.
+> The syntax is `s[start:end]` — `start` is included, `end` is not.
+>
+> ```python
+> s = "ANDROMEDA"
+> s[0:3]   # "AND"
+> s[3:7]   # "ROME"
+> s[-2:]   # "DA"
+> ```
+>
+> Telemetry packets always arrive in this exact format (length 30):
+>
+> ```
+> TIMESTAMP=YYYY-MM-DDTHH:MM:SSZ
+> ```
+>
+> Implement `extract(header)` that returns a tuple `(date, time)`:
+>
+> - `date` = `YYYY-MM-DD` (10 chars)
+> - `time` = `HH:MM:SS` (8 chars)
+>
+> Figure out which slice positions hold each piece.
+>
+> [END TRANSMISSION]
+
+## Your Task
+
+In `starter/starter.py`, return `(date, time)` extracted with slicing.
+
+## Objectives
+
+- `extract("TIMESTAMP=2026-05-04T14:32:01Z")` → `("2026-05-04", "14:32:01")`
+- Works for any header in the same fixed format

1.solar-system/3.strings/02.the-slicer/starter/starter.py

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+def extract(header):
+    """Extract date and time from a fixed-format packet header.
+
+    Header format (always exactly this shape):
+      TIMESTAMP=YYYY-MM-DDTHH:MM:SSZ
+    Length 30. Example:
+      TIMESTAMP=2026-05-04T14:32:01Z
+
+    Return a tuple (date, time) where:
+      date = "YYYY-MM-DD"  (10 chars)
+      time = "HH:MM:SS"    (8 chars)
+
+    extract("TIMESTAMP=2026-05-04T14:32:01Z")
+      -> ("2026-05-04", "14:32:01")
+    """
+    pass

1.solar-system/3.strings/02.the-slicer/testing/test_solution.py

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+from solution import extract
+
+
+def test_basic():
+    assert extract("TIMESTAMP=2026-05-04T14:32:01Z") == ("2026-05-04", "14:32:01")
+
+
+def test_apollo():
+    assert extract("TIMESTAMP=1969-07-20T13:32:00Z") == ("1969-07-20", "13:32:00")
+
+
+def test_end_of_century():
+    assert extract("TIMESTAMP=2099-12-31T23:59:59Z") == ("2099-12-31", "23:59:59")