摘要：
1、列表 -- （中括号 + 逗号） >>> a = ["aaa","bbb","ccc","ddd"] >>> a ['aaa', 'bbb', 'ccc', 'ddd'] >>> type(a) <class 'list'> 2、元组 -- （小括号 + 逗号） >>> a = ("a","b" 阅读全文
posted @ 2021-03-02 17:23
小鲨鱼2018
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1、 >>> a = dict(a = 111, b = 222, c = 333, d = 444) >>> for i in reversed(a): ## 逆向输出 print(i,a[i]) d 444 c 333 b 222 a 111 2、 >>> a {'a': 111, 'b': 2 阅读全文
posted @ 2021-02-26 09:59
小鲨鱼2018
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1、 >>> a = dict(zip(("a","b","c","d"),(111,222,333,444))) >>> a {'a': 111, 'b': 222, 'c': 333, 'd': 444} >>> b = a ## 假复制 >>> b {'a': 111, 'b': 222, ' 阅读全文
posted @ 2021-02-26 09:42
小鲨鱼2018
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1、 >>> a = {"a":111,"b":222,"c":333,"d":444} >>> a {'a': 111, 'b': 222, 'c': 333, 'd': 444} >>> del a["a"] >>> a {'b': 222, 'c': 333, 'd': 444} >>> d 阅读全文
posted @ 2021-02-26 09:26
小鲨鱼2018
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摘要：
1、 >>> a = dict(zip(("a","b","c","d"),(111,222,333,444))) >>> a {'a': 111, 'b': 222, 'c': 333, 'd': 444} >>> type(a) <class 'dict'> >>> a.clear() >>> 阅读全文
posted @ 2021-02-26 09:17
小鲨鱼2018
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1、 >>> a = {"a":111,"b":222,"c":333,"d":444,"a":555} ## 如果键重复，则仅保留最后一个键值对 >>> a {'a': 555, 'b': 222, 'c': 333, 'd': 444} 阅读全文
posted @ 2021-02-25 21:50
小鲨鱼2018
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摘要：
1、 >>> a = dict(a = 111, b = 222, c = 333, d = 444) >>> a["a"] 111 >>> a["c"] 333 >>> b = ("b","d") >>> for i in b: print(a[i]) 222 444 2、 >>> a = dic 阅读全文
posted @ 2021-02-25 21:39
小鲨鱼2018
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1、 >>> a = dict(a = 111, b = 222, c = 333, d = 444) >>> a {'a': 111, 'b': 222, 'c': 333, 'd': 444} >>> a["e"] = 555 ## 增加项 >>> a {'a': 111, 'b': 222, 阅读全文
posted @ 2021-02-25 21:35
小鲨鱼2018
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1、 >>> a = {"a":111,"b":222,"c":333,"d":444} >>> a {'a': 111, 'b': 222, 'c': 333, 'd': 444} >>> len(a) 4 >>> type(a) <class 'dict'> 2、 >>> a = dict((( 阅读全文
posted @ 2021-02-25 21:25
小鲨鱼2018
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摘要：
1、 >>> a = ["ccc","aaa","ddd","bbb"] ## 利用列表分片 >>> b = a[::-1] >>> b ['bbb', 'ddd', 'aaa', 'ccc'] 2、 >>> a = ["ccc","aaa","ddd","bbb"] >>> b = 阅读全文
posted @ 2021-02-25 21:03
小鲨鱼2018
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