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Python面试整理
1、说一下Python的数据类型有几种? 答:有六种,分别为, Number(数字) String(字符串) List(列表) Tuple(元组) Set(集合) Dictionary(字典) 2、Pandas关于空值的处理 参考下面的链接 https://www.cnblogs.com/louyi ...
分类:编程语言   时间:2020-07-28 22:06:18    阅读次数:68
关于使用sklearn进行数据预处理 —— 归一化/标准化/正则化
转自:https://www.cnblogs.com/chaosimple/p/4153167.html 一、标准化(Z-Score),或者去除均值和方差缩放 公式为:(X-mean)/std 计算时对每个属性/每列分别进行。 将数据按期属性(按列进行)减去其均值,并处以其方差。得到的结果是,对于每 ...
分类:其他好文   时间:2020-07-28 17:09:32    阅读次数:72
Leetcode.283 | Move Zeroes(Python)
Leetcode.283 Move Zeroes Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero e ...
分类:编程语言   时间:2020-07-28 14:38:35    阅读次数:91
583. Delete Operation for Two Strings
Given two words word1 and word2, find the minimum number of steps required to make word1 and word2 the same, where in each step you can delete one cha ...
分类:其他好文   时间:2020-07-28 14:04:15    阅读次数:77
Geant4+Ubuntu安装过程中的各种bug
硬件条件:Thinkpad P52 + SAMSUNG 1T M.2新硬盘 Step1:安装ubuntu Bugs: 首先需要disable security boot! Magic Number void!(找个新优盘,装ubuntu) 安装过程到选择硬盘空间时卡死(不支持P1000显卡驱动,在b ...
分类:系统相关   时间:2020-07-28 10:08:38    阅读次数:109
【刷题-LeetCode】306. Additive Number
Additive Number Additive number is a string whose digits can form additive sequence. A valid additive sequence should contain at least three numbers. ...
分类:其他好文   时间:2020-07-27 17:46:30    阅读次数:60
[CF从零单排#17]158B - Taxi
题目来源:http://codeforces.com/contest/158/problem/B After the lessons n groups of schoolchildren went outside and decided to visit Polycarpus to celebrat ...
分类:其他好文   时间:2020-07-27 16:07:20    阅读次数:89
[LeetCode 1530] Number of Good Leaf Nodes Pairs
Given the root of a binary tree and an integer distance. A pair of two different leaf nodes of a binary tree is said to be good if the length of the s ...
分类:其他好文   时间:2020-07-27 15:58:17    阅读次数:93
[LeetCode 1526] Minimum Number of Increments on Subarrays to Form a Target Array
Given an array of positive integers target and an array initial of same size with all zeros. Return the minimum number of operations to form a target  ...
分类:其他好文   时间:2020-07-27 15:38:31    阅读次数:66
分析数据库占用cpu 和 内存情况
SELECT total_cpu_time,[total_physical_Reads], total_execution_count, number_of_statements, s2.text --(SELECT SUBSTRING(s2.text, statement_start_offset ...
分类:数据库   时间:2020-07-27 15:37:19    阅读次数:122
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