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                [TOC] # 運算符 | 運算符 | python表達式 | 結果 | 描述 | 支持的數據類型 | |---|---|---|---|---| | + | [1,2]+[3,4] | [1,2,3,4] | 合并 | 字符串,列表,元組 | | * | `["Hi!"]*4` | ["Hi!","Hi!","Hi!","Hi!"] | 重復 | 字符串,列表,元組 | | in | 3 in (1,2,3) | True | 元素是否存在 | 字符串,列表,元組,字典 | | not in | 4 not in (1,2,3) | True | 元素是否不存在 | 字符串,列表,元組,字典 | | >,>=,==,<,<= | (1,2,3)<(2,2,3) | True | 元素比較 |字符串,列表,元組 | 注意: * in在對字典操作時,判斷是字典的鍵 * in和not in被稱為成員運算符 ## + ~~~ >>> "hello " + "itcast" 'hello itcast' >>> [1, 2] + [3, 4] [1, 2, 3, 4] >>> ('a', 'b') + ('c', 'd') ('a', 'b', 'c', 'd') ~~~ ## * ~~~ >>> 'ab'*4 'ababab' >>> [1, 2]*4 [1, 2, 1, 2, 1, 2, 1, 2] >>> ('a', 'b')*4 ('a', 'b', 'a', 'b', 'a', 'b', 'a', 'b') ~~~ ## in ~~~ >>> 'itc' in 'hello itcast' True >>> 3 in [1, 2] False >>> 4 in (1, 2, 3, 4) True >>> "name" in {"name":"Delron", "age":24} True ~~~ **注意,in在對字典操作時,判斷的是字典的鍵**
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