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Hello World

小坑

jdbc 错误代码: The server time zone value '?й???????' is unrecognized or represents more than one time zone. You must configure either the server or JDBC

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matplotlib tick 能见度

当图片中的内容较多,相互遮盖时,我们可以通过设置相关内容的透明度来使图片更易于观察,也即是通过本节中的bbox参数设置来调节图像信息. 首先参考之前的例子, 我们先绘制图像基本信息: import matplotlib.pyplot as plt import numpy as np x = np

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cat显示指定行

参考: https://blog.csdn.net/w417678197/article/details/122614109 cat 显示指定行 从第500行开始,显示100行。即显示500~599行 cat filename | tail -n +500 | head -n 100 显示100行

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wiki_test.py

import requests from bs4 import BeautifulSoup import datetime import random import re from urllib.request import urljoin random.seed(datetime.datetim

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SQLAlchemy:更新数据

更新记录 更新单条记录 query = session.query(User) user = query.get('lujianxing11') print user.accout user.accout='987' session.flush() 更新多条记录 query = session.

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Ubuntu:mysql安装和操作

流程:更新软件包索引,安装mysql-server软件包,然后运行附带的安全脚本 sudo apt-get update sudo apt-get install mysql-server sudo mysql_secure_installation sudo apt-get update:更新

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[561]数组拆分 I

public class Solution { public int arrayPairSum(int[] nums) { Arrays.sort(nums); int sum =0; for (int i = 0; i < nums.len

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