4.9小节完成！

cookbook/c04/p09_iter_permutation.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+# -*- encoding: utf-8 -*-
+"""
+Topic: 排列组合迭代
+Desc : 
+"""
+from itertools import permutations
+from itertools import combinations
+from itertools import combinations_with_replacement
+
+
+def iter_permutation():
+    """排列组合"""
+
+    items = ['a', 'b', 'c']
+
+    # 全排列
+    for p in permutations(items):
+        print(p)
+
+    # 指定长度
+    for p in permutations(items, 2):
+        print(p)
+
+    # 组合
+    for c in combinations(items, 3):
+        print(c)
+
+    # 可重复组合
+    for c in combinations_with_replacement(items, 3):
+        print(c)
+
+if __name__ == '__main__':
+    iter_permutation()