更新

Python-100-Days/Day01-15/Day07/set1.py

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+"""
+
+定义和使用集合
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-06
+
+"""
+
+
+def main():
+    set1 = {1, 2, 3, 3, 3, 2}
+    print(set1)
+    print('Length =', len(set1))
+    set2 = set(range(1, 10))
+    print(set2)
+    set1.add(4)
+    set1.add(5)
+    set2.update([11, 12])
+    print(set1)
+    print(set2)
+    set2.discard(5)
+    # remove的元素如果不存在会引发KeyError
+    if 4 in set2:
+        set2.remove(4)
+    print(set2)
+    # 遍历集合容器
+    for elem in set2:
+        print(elem ** 2, end=' ')
+    print()
+    # 将元组转换成集合
+    set3 = set((1, 2, 3, 3, 2, 1))
+    print(set3.pop())
+    print(set3)
+
+
+if __name__ == '__main__':
+    main()