Python合并列表并去重

有勇气的牛排 562 Python 2024-09-22 21:18:37

1 兩個簡單的案例

A = [1, 3, 2]
B = [3, 4, 5]

C = A + B
print(set(C))
print(list(set(C)))

print(dict.fromkeys(C))
print(list(dict.fromkeys(C)))

Python合并列表并去重

2 萬物節可util

https://www.couragesteak.com/article/481

class UtilList:

    # 合并多个列表 保持原顺序 去重
    @staticmethod
    def merge_list_order(*lists):
        """
        fromkeys 在 Python 3.7 及以上版本中，字典保持插入顺序
        """
        return list(dict.fromkeys(item for lst in lists for item in lst))

    # 合并多个列表 去重 不考虑顺序
    @staticmethod
    def merge_list_unorder(*lists):
        """
        set 使用 哈希表来存储元素
        :param lists:
        :return:
        """
        return list(set(item for lst in lists for item in lst))


A = [1, 3, 2]
B = [3, 4, 5]

# 保持原顺序去重
res_order = UtilList.merge_list_order(A, B)
print("保持原顺序 去重:", res_order)
# 输出: [1, 3, 2, 4, 5]

# 不考虑顺序去重
res_un_order = UtilList.merge_list_unorder(A, B)
print("不考虑顺序 去重:", res_un_order)
# 输出: [1, 2, 3, 4, 5]

<h2><a id="1__0"></a>1 兩個簡單的案例</h2> <pre><div class="hljs"><code class="lang-python">A = [1, 3, 2] B = [3, 4, 5] C = A + B print(set(C)) print(list(set(C))) print(dict.fromkeys(C)) print(list(dict.fromkeys(C))) </code></div></pre> <img src="https://static.couragesteak.com/article/2c1a7ae6d3c9ae205992a5b800b10129.png" alt="Python合并列表并去重" /> <h2><a id="2_util_18"></a>2 萬物節可util</h2> <a href="https://www.couragesteak.com/article/481" target="_blank">https://www.couragesteak.com/article/481</a> <pre><div class="hljs"><code class="lang-python">class UtilList: # 合并多个列表保持原顺序去重 @staticmethod def merge_list_order(*lists): """ fromkeys 在 Python 3.7 及以上版本中，字典保持插入顺序 """ return list(dict.fromkeys(item for lst in lists for item in lst)) # 合并多个列表去重不考虑顺序 @staticmethod def merge_list_unorder(*lists): """ set 使用哈希表来存储元素 :param lists: :return: """ return list(set(item for lst in lists for item in lst)) A = [1, 3, 2] B = [3, 4, 5] # 保持原顺序去重 res_order = UtilList.merge_list_order(A, B) print("保持原顺序去重:", res_order) # 输出: [1, 3, 2, 4, 5] # 不考虑顺序去重 res_un_order = UtilList.merge_list_unorder(A, B) print("不考虑顺序去重:", res_un_order) # 输出: [1, 2, 3, 4, 5] </code></div></pre>

Python合并列表并去重

1 兩個簡單的案例

2 萬物節可util

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