小编Nim*_*ush的帖子

我有一个使用SA的association_proxy建模的多对多(开发人员和项目)关系.集合(每个项目的开发人员和每个开发人员的项目)工作正常,但我需要过滤关联本身的属性(状态).像这样的东西(不起作用):

activeDevelopers = s.query(Developer).filter_by(Developer.developerProjects.status == 'active').all()

我错过了什么？这是完整的测试代码:

import logging
from sqlalchemy import create_engine, Table, Column, Integer, String, MetaData, ForeignKey
from sqlalchemy.orm import relation, mapper, sessionmaker
from sqlalchemy.sql import *
from sqlalchemy.ext.associationproxy import association_proxy

log = logging.getLogger('nm_test')
logging.basicConfig(level=logging.DEBUG,
        format='%(asctime)s,%(msecs)03d %(levelname)s [%(filename)s.%(funcName)s @ %(lineno)d.%(thread)d] %(message)s')

engine = create_engine('sqlite:///:memory:', echo = False, echo_pool = False)
meta = MetaData()
meta.bind = engine

developer_table = Table('developer', meta,
    Column('id', Integer, primary_key=True, autoincrement = False),
    Column('name', String),
)

project_table = Table('project', meta,
    Column('id', …

我在运行chrome时要求进行selenium测试但我遇到了Exception.帮我恳求.我的代码是:

using System;
using System.Diagnostics;
using System.Globalization;
using System.Linq;
using OpenQA.Selenium.Support.UI;
using System.Text;
using System.Threading;
using NUnit.Framework;
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome; 

namespace Acceptance_Test.Trader
{
    [TestFixture]
    public class AcceptenceTestBtcTraderCom
    {
        private IWebDriver _driver;
        private StringBuilder _verificationErrors;
        private string _baseUrl;


        [SetUp]
        public void SetupTest()
        {
            _driver = new ChromeDriver(); // ** exception location is this one.

WebDriver.dll中出现"OpenQA.Selenium.DriverServiceNotFoundException"类型的例外但未在用户代码中处理附加信息:chromedriver.exe文件不存在于当前目录或PATH环境变量的目录中.该驱动程序可以从chromedriver.storage.googleapis.com/index.html下载

我被困在从数组中获取最小值。每次运行时，最小值仍然为零。我知道索引必须减一，但我只是不知道我应该如何将它应用于代码。对不起我的英语不好，我希望你们能帮助我！

public partial class Form1 : Form
{
    int[] numbers = new int[99];
    int index = 0;

    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {

    }
    public int Som()
    {
        //if the numbers are <99 they will be add to index.
        int som = 0;
        for (int i = 0; i < 99; i++)
        {
            som = som + numbers[i];
        }
        return som;
    }
    public int Average()
    {
        // 
        int answersom = Som();
        int g = …

我有一本以元组为键，还以元组为值的字典。我需要一种基于字典键访问字典值的方法。例如：

d = {}
d = { (1, 2) : ('A', 'B'),(3, 4) : ('C', 'B') }

现在，首先，我需要检查(1, 2)字典中是否已经存在键。

就像是：

if d.has_key(1,2)
   print d[1]
   print d[2]