/* * Copyright 2017 JessYan * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICEN
pandas大家用的都很多,像我这种用的不够熟练,也不够多的就只能做做笔记,尽量留下点东西吧. 筛选行: a. 按照列的条件筛选 df = pandas.DataFrame(...) # supposing it has 3 columns: a, b and c df[(df['a'] > 0) & (df['b'] < 0) | df['c'] > 0] b. 按照索引的条件筛选 needed_seq=[1,2,3,6] needed_df = df.loc[needed_s
使用currentIndex()或者currentText() void Widget::calc() { int first = ui->firstLineEdit->text().toInt(); int second = ui->secondLineEdit->text().toInt(); int result; switch(ui->comboBox->currentIndex()) { case 0: result = first + second; ui-
ASP.NET Core MVC 2.1 特意为构建 HTTP API 提供了一些小特性,今天主角就是 ApiControllerAttribute. (注:文章是18年2月份的,所以文章提到了core2.1还没发布). 本文参考自:Exploring the ApiControllerAttribute and its features for ASP.NET Core MVC 2.1 0. ApiControllerAttribute 继承自 ControllerAttribute ASP.