minor fixes

Author: zStupan

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ['3.9', '3.10']
+        python-version: ['3.9', '3.10', '3.11', '3.12']
     defaults:
       run:
         shell: bash

examples/run.py

@@ -1,9 +1,5 @@
-import numpy as np
 from fireflyalgorithm import FireflyAlgorithm
-
-
-def sphere(x):
-    return np.sum(x ** 2)
+from fireflyalgorithm.problems import sphere
 
 
 FA = FireflyAlgorithm()

fireflyalgorithm/problems.py

@@ -56,7 +56,7 @@ def katsuura(x):
     dim = len(x)
     k = np.atleast_2d(np.arange(1, 33)).T
     i = np.arange(0, dim * 1)
-    inner = np.round(2**k * x) * (2 ** (-k))
+    inner = np.round(2**k * x) * (2.0 ** (-k))
     return np.prod(np.sum(inner, axis=0) * (i + 1) + 1)
 
 
@@ -165,7 +165,9 @@ def schaffer4(x):
 
 def schwefel(x):
     dim = len(x)
-    return 418.9829 * dim - np.sum(x * np.sin(np.sqrt(np.abs(x))))
+    return 418.982887272433799807913601398 * dim - np.sum(
+        x * np.sin(np.sqrt(np.abs(x)))
+    )
 
 
 def schwefel21(x):