小鲨鱼2018

2021年2月25日

摘要： 1、 >>> a = ("aaa","bbb","ccc","ddd","eee","fff") >>> a[:2] + a[3:] ## 删除元素ccc ('aaa', 'bbb', 'ddd', 'eee', 'fff') >>> a[:2] + a[4:] ## 删除元素ccc和ddd ('a 阅读全文

posted @ 2021-02-25 08:42 小鲨鱼2018 阅读(1757) 评论(0) 推荐(0) 编辑

python中如何向元组中添加元素

摘要： 1、 >>> a = ("aaa","bbb","ccc","ddd","eee") >>> type(a) <class 'tuple'> >>> a[:2] + ("xxx",) + a[2:] ('aaa', 'bbb', 'xxx', 'ccc', 'ddd', 'eee') >> 阅读全文

posted @ 2021-02-25 08:27 小鲨鱼2018 阅读(18206) 评论(0) 推荐(0) 编辑

2021年2月24日

python中修改元组元素的值

摘要： 1、 >>> a = ("aaa","bbb","ccc","ddd","eee","fff") >>> type(a) <class 'tuple'> >>> id(a) 1360669254176 >>> a[2] = "xxx" Traceback (most recent call last 阅读全文

posted @ 2021-02-24 22:54 小鲨鱼2018 阅读(2274) 评论(0) 推荐(0) 编辑

python中修改列表元素的值

摘要： >>> a = ["aaa","bbb","ccc","ddd"] >>> a[1] = "xxx" ## 修改第二个元素 >>> a ['aaa', 'xxx', 'ccc', 'ddd'] >>> a[2:4] = ["mmm","nnn"] ## 修改第三和第四个元素 >>> a ['aaa 阅读全文

posted @ 2021-02-24 22:13 小鲨鱼2018 阅读(4462) 评论(0) 推荐(0) 编辑

python中输出变量

摘要： 1、 >>> a = 100 >>> b = 200 >>> print(a,b) 100 200 >>> print("the score is:",a) the score is: 100 >>> print(f"the score is:{a}") the score is:100 阅读全文

posted @ 2021-02-24 22:04 小鲨鱼2018 阅读(321) 评论(0) 推荐(0) 编辑

python中给列表元素去重复

摘要： 1、 >>> a = ["aaa","bbb","aaa","aaa","bbb","aaa","ccc","ddd","ddd"] >>> b = [] >>> for i in a: if i not in b: b.append(i) >>> b ## for循环去重复 ['aaa', 'bb 阅读全文

posted @ 2021-02-24 21:59 小鲨鱼2018 阅读(237) 评论(0) 推荐(0) 编辑

python中取列表相对于另一列表的唯一值

摘要： 1、 >>> a = ["aaa","bbb","ccc","ddd"] >>> b = ["ccc","ddd","eee","fff"] >>> c = [] >>> for i in a: if i not in b: c.append(i) >>> c ['aaa', 'bbb'] >>> 阅读全文

posted @ 2021-02-24 21:45 小鲨鱼2018 阅读(88) 评论(0) 推荐(0) 编辑

python中求列表的交集和并集

摘要： 1、 >>> a = ["aaa","bbb","ccc","ddd"] >>> b = ["ccc","ddd","eee","fff"] >>> c = a + b >>> c ['aaa', 'bbb', 'ccc', 'ddd', 'ccc', 'ddd', &# 阅读全文

posted @ 2021-02-24 21:38 小鲨鱼2018 阅读(1173) 评论(0) 推荐(0) 编辑

python中输出列表中重复元素的所有索引

摘要： >>> a = ["aa","bb","aa","cc","aa","dd","bb","aa","cc"] >>> a ['aa', 'bb', 'aa', 'cc', 'aa', 'dd', 'bb', 'aa', 'cc'] > 阅读全文

posted @ 2021-02-24 10:51 小鲨鱼2018 阅读(2445) 评论(0) 推荐(0) 编辑

python中求1到100的和

摘要： >>> sum = 0 >>> for i in range(1,101): ## 利用for循环 sum += i >>> print(sum) 5050 >>> del sum >>> sum(list(range(1,101))) ## 利用sum函数 5050 >>> sum = 0 >>> 阅读全文

posted @ 2021-02-24 10:44 小鲨鱼2018 阅读(3292) 评论(0) 推荐(0) 编辑

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