![\"\"](\"https:\/\/softasia.jp\/blog\/wp-content\/uploads\/2025\/07\/SOFT_ASIA_\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1-4-300x169.png\")
<\/p>\n<\/p>\n
<\/p>\n
Python\u306b\u306f\u591a\u5f69\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u4e2d\u3067\u3082\u300c\u91cd\u8907\u3092\u306a\u304f\u3057\u305f\u3044<\/span>\u300d\u300c\u52b9\u7387\u3088\u304f\u30c7\u30fc\u30bf\u3092\u7ba1\u7406\u3057\u305f\u3044<\/span>\u300d\u300c\u96c6\u5408\u6f14\u7b97\u3092\u884c\u3044\u305f\u3044<\/span>\u300d<\/strong>\u3068\u3044\u3046\u5834\u9762\u3067\u5f37\u529b\u306b\u6d3b\u8e8d\u3059\u308b\u306e\u304cset\uff08\u30bb\u30c3\u30c8\uff09\u578b\u3067<\/strong><\/span>\u3059\u3002\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u51e6\u7406\u3084\u9ad8\u901f\u691c\u7d22\u306b\u9069\u3057\u3066\u304a\u308a\u3001\u30b7\u30f3\u30d7\u30eb\u306a\u304c\u3089\u5b9f\u52d9\u3067\u975e\u5e38\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/span><\/p>\n <\/p>\n \u672c\u8a18\u4e8b\u3067\u306f\u3001Python\u306eset\u578b\u306b\u3064\u3044\u3066\u3001\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u5fdc\u7528\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3001\u3055\u3089\u306b\u306f\u696d\u52d9\u30b7\u30fc\u30f3\u3067\u6d3b\u304b\u305b\u308b\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u307e\u3067\u5fb9\u5e95\u7684\u306b\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u521d\u5fc3\u8005\u306f\u3082\u3061\u308d\u3093\u3001Python\u7d4c\u9a13\u8005\u3067\u3082\u77e5\u8b58\u3092\u518d\u6574\u7406\u3057\u305f\u3044\u65b9\u306b\u304a\u3059\u3059\u3081\u306e\u5185\u5bb9\u3067\u3059\u3002<\/span><\/p>\n <\/p>\n \u76ee\u6b21<\/p> <\/p>\n Python\u306eset\u578b\u306f\u3001\u30ea\u30b9\u30c8\u3084\u30bf\u30d7\u30eb\u3068\u4e26\u3076\u300c\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u578b\u300d\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u3072\u3068\u3064<\/strong><\/span>\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/p>\n <\/p>\n <\/p>\n fruits = {“apple”, “banana”, “orange”, “apple”}<\/span><\/p>\n print(fruits)\u00a0 # \u51fa\u529b: {‘banana’, ‘orange’, ‘apple’}<\/span><\/p>\n <\/p>\n \u3053\u306e\u3088\u3046\u306b\u3001\u91cd\u8907\u3057\u3066\u3044\u305f”apple”\u304c1\u3064\u306b\u307e\u3068\u3081\u3089\u308c\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/span><\/p>\n <\/p>\n \u7279\u5fb4<\/b><\/b><\/p>\n<\/td>\n list<\/b><\/b><\/p>\n<\/td>\n tuple<\/b><\/b><\/p>\n<\/td>\n set<\/b><\/b><\/p>\n<\/td>\n<\/tr>\n \u91cd\u8907<\/strong><\/p>\n<\/td>\n \u8a31\u5bb9\u3055\u308c\u308b<\/p>\n<\/td>\n \u8a31\u5bb9\u3055\u308c\u308b<\/p>\n<\/td>\n \u8a31\u5bb9\u3055\u308c\u306a\u3044<\/p>\n<\/td>\n<\/tr>\n \u9806\u5e8f<\/strong><\/p>\n<\/td>\n \u4fdd\u6301\u3055\u308c\u308b<\/p>\n<\/td>\n \u4fdd\u6301\u3055\u308c\u308b<\/p>\n<\/td>\n \u4fdd\u6301\u3055\u308c\u306a\u3044<\/p>\n<\/td>\n<\/tr>\n \u5909\u66f4<\/strong><\/p>\n<\/td>\n \u53ef\u80fd\uff08\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\uff09<\/p>\n<\/td>\n \u4e0d\u53ef\uff08\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\uff09<\/p>\n<\/td>\n \u53ef\u80fd\uff08\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\uff09<\/p>\n<\/td>\n<\/tr>\n \u4e3b\u306a\u7528\u9014<\/strong><\/p>\n<\/td>\n \u4e26\u3079\u3089\u308c\u305f<\/p>\n \u30c7\u30fc\u30bf\u306e\u64cd\u4f5c<\/p>\n<\/td>\n \u5909\u66f4\u3057\u306a\u3044<\/p>\n \u30c7\u30fc\u30bf\u306e\u4fdd\u6301<\/p>\n<\/td>\n \u91cd\u8907\u306e\u306a\u3044<\/p>\n \u30c7\u30fc\u30bf\u7ba1\u7406\u30fb\u96c6\u5408\u6f14\u7b97<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n <\/p>\n \u4f8b\u3048\u3070\u3001\u9806\u5e8f\u4ed8\u304d\u3067\u5c65\u6b74\u3084\u30bf\u30b9\u30af\u3092\u6271\u3044\u305f\u3044\u5834\u5408\u306flist<\/strong><\/span>\u3092\u3001\u56fa\u5b9a\u3055\u308c\u305f\u8a2d\u5b9a\u5024\u306e\u4fdd\u6301\u306b\u306ftupl<\/strong>e<\/strong><\/span>\u3092\u3001\u91cd\u8907\u306e\u306a\u3044\u30c7\u30fc\u30bf\u6bd4\u8f03\u3084\u691c\u7d22\u3092\u884c\u3044\u305f\u3044\u5834\u5408\u306fset<\/strong><\/span>\u3092\u9078\u3076\u3068\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n <\/p>\n \u2460 \u6ce2\u304b\u3063\u3053\u3092\u4f7f\u3046<\/b><\/p>\n my_set = {1, 2, 3}<\/span><\/p>\n <\/p>\n \u2461 set()\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u4f7f\u3046<\/b><\/p>\n my_set = set([1, 2, 3, 3])<\/span>\u00a0 # \u30ea\u30b9\u30c8\u3084\u30bf\u30d7\u30eb\u304b\u3089\u4f5c\u6210\u53ef\u80fd<\/span><\/p>\n <\/p>\n \u2462 \u7a7a\u306eset\u306e\u4f5c\u6210<\/b><\/p>\n \u7a7a\u306e\u4e2d\u304b\u3063\u3053{}\u306f\u7a7a\u306e\u8f9e\u66f8\u306b\u306a\u308b\u306e\u3067\u3001\u7a7a\u306eset\u3092\u4f5c\u308b\u306b\u306f\u5fc5\u305aset()\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002<\/span><\/p>\n empty_set = set()<\/span><\/p>\n <\/p>\n \u2463 \u30ea\u30b9\u30c8\u3084\u30bf\u30d7\u30eb\u304b\u3089\u5909\u63db<\/b><\/p>\n my_list = [1, 2, 2, 3]<\/span><\/p>\n my_set = set(my_list)<\/span><\/p>\n print(my_set)\u00a0<\/span> # \u7d50\u679c: {1, 2, 3}<\/span><\/p>\n my_tuple = (1, 2, 2, 3)<\/span><\/p>\n my_set = set(my_tuple)<\/span><\/p>\n print(my_set)\u00a0<\/span> # \u7d50\u679c: {1, 2, 3}<\/span><\/p>\n <\/p>\n <\/p>\n \u8981\u7d20\u306e\u8ffd\u52a0\u3068\u524a\u9664<\/b><\/p>\n my_set = {1, 2, 3}<\/span><\/p>\n my_set.add(4)\u00a0<\/span> # \u8ffd\u52a0<\/span><\/p>\n print(my_set)\u00a0 # {1, 2, 3, 4}<\/span><\/p>\n my_set.remove(2)\u00a0<\/span> # \u5b58\u5728\u3059\u308b\u8981\u7d20\u3092\u524a\u9664<\/span><\/p>\n my_set.discard(5)\u00a0<\/span> # \u5b58\u5728\u3057\u306a\u3044\u8981\u7d20\u3067\u3082\u30a8\u30e9\u30fc\u306a\u3057<\/span><\/p>\n print(my_set)\u00a0<\/span> # {1, 3, 4}<\/span><\/p>\n <\/p>\n \u8981\u7d20\u306e\u5b58\u5728\u78ba\u8a8d<\/b><\/p>\n print(3 in my_set)\u00a0<\/span> # True<\/span><\/p>\n print(10 in my_set)\u00a0<\/span> # False<\/span><\/p>\n <\/p>\n <\/p>\n \u548c\u96c6\u5408\uff08union\uff09<\/b><\/p>\n a = {1, 2, 3}<\/span><\/p>\n b = {3, 4, 5}<\/span><\/p>\n print(a | b)\u00a0<\/span> # {1, 2, 3, 4, 5}<\/span><\/p>\n <\/p>\n \u7a4d\u96c6\u5408\uff08intersection\uff09<\/b><\/p>\n a = {1, 2, 3}<\/span><\/p>\n b = {3, 4, 5}<\/span><\/p>\n print(a & b)\u00a0<\/span> # {3}<\/span><\/p>\n <\/p>\n \u5dee\u96c6\u5408\uff08difference\uff09<\/b><\/p>\n a = {1, 2, 3}<\/span><\/p>\n b = {3, 4, 5}<\/span><\/p>\n print(a – b)<\/span>\u00a0 # {1, 2}<\/span><\/p>\n <\/p>\n \u5bfe\u79f0\u5dee\uff08symmetric_difference\uff09<\/b><\/p>\n a = {1, 2, 3}<\/span><\/p>\n b = {3, 4, 5}<\/span><\/p>\n print(a ^ b)\u00a0<\/span> # {1, 2, 4, 5}<\/span><\/p>\n <\/p>\n \u3053\u308c\u3089\u306f\u305d\u308c\u305e\u308c.union(), .intersection(), .difference(), .symmetric_difference()\u3068\u3044\u3063\u305f\u30e1\u30bd\u30c3\u30c9\u5f62\u5f0f\u3067\u3082\u8a18\u8ff0\u53ef\u80fd<\/strong><\/span>\u3067\u3059\u3002<\/span><\/p>\n <\/p>\n Web\u30b9\u30af\u30ec\u30a4\u30d4\u30f3\u30b0\u3084\u30ed\u30b0\u96c6\u8a08\u306a\u3069\u3001\u540c\u3058\u30c7\u30fc\u30bf\u304c\u4f55\u5ea6\u3082\u73fe\u308c\u308b\u5834\u5408\u306bset\u304c\u6709\u52b9\u3067\u3059\u3002<\/strong><\/span><\/p>\n <\/p>\n emails = [“a@example.com”, “b@example.com”, “a@example.com”]<\/span><\/p>\n unique_emails = list(set(emails))<\/span><\/p>\n print(unique_emails)<\/span>\u00a0 # [‘a@example.com’, ‘b@example.com’]<\/span><\/p>\n <\/p>\n \u30ea\u30b9\u30c8\uff08list\uff09\u3068\u6bd4\u8f03\u3057\u3066\u3001set\u306ein\u6f14\u7b97\u5b50\u306f\u5e73\u5747\u7684\u306b\u9ad8\u901f\u3067\u3059\u3002<\/strong><\/span><\/p>\n <\/p>\n import time<\/span><\/p>\n items = list(range(1000000))<\/span><\/p>\n target_set = set(items)<\/span><\/p>\n start = time.time()<\/span><\/p>\n print(999999 in target_set)<\/span><\/p>\n print(“set\u691c\u7d22\u6642\u9593\uff1a”, time.time() – start)<\/span><\/p>\n <\/p>\n \u30ea\u30b9\u30c8\u691c\u7d22\u3088\u308a\u3082\u306f\u308b\u304b\u306b\u77ed\u6642\u9593\u3067\u6e08\u3080\u305f\u3081\u3001\u691c\u7d22\u5bfe\u8c61\u304c\u6570\u4e07\u4ef6\u4ee5\u4e0a\u3042\u308b\u5834\u5408\u306fset\u3078\u306e\u5909\u63db\u304c\u5f37\u304f\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/span><\/p>\n <\/p>\n list1 = [1, 2, 3, 4]<\/span><\/p>\n list2 = [3, 4, 5, 6]<\/span><\/p>\nset\u3068\u306f\uff1f\u7279\u5fb4\u3068\u57fa\u672c\u69cb\u6587<\/span><\/span><\/h2>\n
![\"\"](\"https:\/\/softasia.jp\/blog\/wp-content\/uploads\/2025\/07\/SOFT-_ASIA-19-300x200.png\")
<\/p>\nset\u306e\u7279\u5fb4<\/span><\/span><\/h3>\n
\n
list\u3084tuple\u3068\u306e\u9055\u3044<\/span><\/span><\/h3>\n
\n\n
\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n set\u306e\u4f5c\u6210\u65b9\u6cd5<\/span><\/span><\/h3>\n
set\u306e\u57fa\u672c\u64cd\u4f5c<\/span><\/span><\/h2>\n
![\"\"](\"https:\/\/softasia.jp\/blog\/wp-content\/uploads\/2025\/07\/SOFT-_ASIA-20-300x200.png\")
<\/p>\n\u96c6\u5408\u6f14\u7b97\u306e\u57fa\u672c<\/span><\/span><\/h2>\n
![\"\"](\"https:\/\/softasia.jp\/blog\/wp-content\/uploads\/2025\/07\/SOFT-_ASIA-21-300x200.png\")
<\/p>\n\u5b9f\u52d9\u3067\u5f79\u7acb\u3064set\u306e\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/span><\/span><\/h2>\n
![\"\"](\"https:\/\/softasia.jp\/blog\/wp-content\/uploads\/2025\/07\/SOFT-_ASIA-22-300x200.png\")
<\/p>\n<\/h3>\n
\u91cd\u8907\u30c7\u30fc\u30bf\u306e\u524a\u9664<\/span><\/span><\/h3>\n
\u9ad8\u901f\u306a\u691c\u7d22\u51e6\u7406<\/span><\/span><\/h3>\n
\u30ea\u30b9\u30c8\u540c\u58eb\u306e\u5171\u901a\u9805\u62bd\u51fa<\/span><\/span><\/h3>\n