Applied minor change

Author: dhondta

.github/workflows/python-package.yml

@@ -32,7 +32,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
     env:
       package: ${{ needs.prepare.outputs.package }}
     steps:

src/exeplot/VERSION.txt

@@ -1 +1 @@
-0.5.4
+0.5.5

src/exeplot/utils.py

@@ -50,7 +50,7 @@ def ngrams_counts(byte_obj: bytes | object, n: int = 1, step: int = 1) -> list[t
         a = np.frombuffer(data := byte_obj if isinstance(byte_obj, bytes) else byte_obj.bytes, dtype=np.uint8)
         l = a.size
         if l < n:
-            return {}
+            return []
         if n == 1:
             counts = {b.to_bytes(1, "big"): int(c) for b, c in \
                       enumerate(np.bincount(np.frombuffer(data, dtype=np.uint8)))}
@@ -68,7 +68,7 @@ def ngrams_counts(byte_obj: bytes | object, n: int = 1, step: int = 1) -> list[t
             if n not in byte_obj._ngram_counts_cache.keys():
                 byte_obj._ngram_counts_cache[n] = counts
             return byte_obj._ngram_counts_cache[n]
-    raise TypeError("Bad input type ; should be a byte sequence or object")
+    raise TypeError(f"Bad input type ; should be a byte sequence or object (got '{type(byte_obj)}')")
 
 
 def ngrams_distribution(byte_obj: bytes | object, n: int = 1, step: int = 1, n_most_common: Optional[int] = None,
@@ -83,7 +83,8 @@ def ngrams_distribution(byte_obj: bytes | object, n: int = 1, step: int = 1, n_m
     :param exclude:       list of specific n-grams to be excluded, no exclusion by default
     :return:              list of n_most_common (n-gram, count) pairs
     """
-    c = ngrams_counts(byte_obj, n, step)
+    if len(c := ngrams_counts(byte_obj, n, step)) == 0:
+        return []
     r = c[:len(c) if n_most_common is None else n_most_common + n_exclude_top + len(exclude or [])]
     if exclude is not None:
         r = [(ngram, count) for ngram, count in r if ngram not in exclude]

tests/test_others.py

@@ -23,7 +23,7 @@ def test_ngrams_functions(self):
         for n in [0, 4]:
             self.assertRaises(ValueError, ngrams_counts, b"abc", n=n)
         self.assertRaises(ValueError, ngrams_counts, b"abc", step=-1)
-        self.assertEqual(ngrams_counts(b"a", n=2), {})
+        self.assertEqual(ngrams_counts(b"a", n=2), [])
         self.assertTrue(isinstance(ngrams_counts(seq := b"\x00" * 4 + os.urandom(120) + b"\xff" * 4), list))
         self.assertTrue(isinstance(ngrams_counts(seq := b"\x00" * 4 + os.urandom(120) + b"\xff" * 4, n=2), list))
         class Test: