Add the section of selection sort. (#513)

codes/python/chapter_sorting/selection_sort.py

@@ -0,0 +1,26 @@
+"""
+File: selection_sort.py
+Created Time: 2023-05-22
+Author: Krahets (krahets@163.com)
+"""
+
+
+def selection_sort(nums: list[int]):
+    """选择排序"""
+    n = len(nums)
+    # 外循环：未排序区间为 [i, n-1]
+    for i in range(n - 1):
+        # 内循环：找到未排序区间 [i, n-1] 中的最小元素
+        k = i
+        for j in range(i + 1, n):
+            if nums[j] < nums[k]:
+                k = j  # 更新最小元素
+        # 将该最小元素与未排序区间的首个元素交换
+        nums[i], nums[k] = nums[k], nums[i]
+
+
+"""Driver Code"""
+if __name__ == "__main__":
+    nums = [4, 1, 3, 1, 5, 2]
+    selection_sort(nums)
+    print("选择排序完成后 nums =", nums)