Changed to byte.split

Author: Casey1022

pyconus-2026-tutorial

@@ -0,0 +1 @@
+Subproject commit 349122da821fd0f69f7fc330af0a938d92b58ecb

rounds/1_histogram/solution.py

@@ -4,11 +4,22 @@
 passes out of the box. Replace the body of ``compute_histogram`` with your
 own faster implementation.
 """
-
-
+import numpy as np
+ 
 def compute_histogram(path: str) -> dict[bytes, int]:
+
     """Frequency of every 2-byte bigram in the file at ``path``."""
-    # TODO: remove this delegation and write your own implementation here.
-    from .baseline import compute_histogram as _baseline
 
-    return _baseline(path)
+    data = np.fromfile(path, dtype=np.uint8)
+
+    if len(data) < 2:
+
+        return {}
+
+    bigrams = (data[:-1].astype(np.uint16) << 8) | data[1:]
+
+    counts = np.bincount(bigrams, minlength=65536)
+
+    return {bytes([idx >> 8, idx & 0xFF]): int(count) for idx, count in enumerate(counts) if count > 0}
+
+ 

rounds/3_dna/solution.py

@@ -8,7 +8,7 @@
 from .baseline import find_matches as _baseline
 
 
-def find_matches(fasta_path: str, pattern: bytes) -> list[tuple[str, list[int]]]:
+def find_matches(fasta_path: str, pattern: bytes.split) -> list[tuple[str, list[int]]]:
     """Find every FASTA record whose sequence contains ``pattern``.
 
     Returns ``[(record_id, [positions...]), ...]`` in file order.