我正在尝试加载我使用NLTK安装程序安装的一些语料库,但我得到了:
>>> from nltk.corpus import machado
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: cannot import name machado
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但是在下载管理器(nltk.download()
)中,包machado被标记为已安装,我有一个nltk_data/corpus/machado
文件夹.
我如何从python intepreter里面看到安装的语料库是什么?
另外,我应该安装哪个软件包来使用这个方法? http://nltk.googlecode.com/svn/trunk/doc/howto/portuguese_en.html
我找不到该方法中nltk.examples
提到的模块.
我必须检查编译器是否正在内联函数.有没有办法这样做而不看装配(我不读).我没有选择搞清楚这一点,所以如果我们不能讨论这样做的智慧,我更愿意.谢谢!
我正在尝试配置Spring + Hibernate + JPA来处理两个数据库(MySQL和MSSQL).
我的datasource-context.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.5.xsd"
xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:util="http://www.springframework.org/schema/util">
<!--
Data Source config
-->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close" p:driverClassName="${local.jdbc.driver}" p:url="${local.jdbc.url}"
p:username="${local.jdbc.username}" p:password="${local.jdbc.password}">
</bean>
<bean id="dataSourceRemote" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close" p:driverClassName="${remote.jdbc.driver}"
p:url="${remote.jdbc.url}" p:username="${remote.jdbc.username}"
p:password="${remote.jdbc.password}" />
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"
p:entity-manager-factory-ref="entityManagerFactory" />
<!--
JPA config
-->
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="persistenceUnitManager"
class="org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager">
<property name="persistenceXmlLocations">
<list value-type="java.lang.String">
<value>classpath*:config/persistence.local.xml</value>
<value>classpath*:config/persistence.remote.xml</value>
</list>
</property>
<property name="dataSources">
<map>
<entry key="localDataSource" value-ref="dataSource" />
<entry key="remoteDataSource" value-ref="dataSourceRemote" …
Run Code Online (Sandbox Code Playgroud) Eclipse PDT与NetBeans的PHP开发相比如何?
我刚买了一台装有Windows 7的新电脑,我开始为PHP设置一个开发环境.有没有人最近使用过两个IDE并且可以进行快速比较?如果您知道支持哪些主要框架,那也会很棒.
我怀疑企业防火墙阻止了宝石的安装.我定义了HTTP_PROXY,我可以通过以下命令查看远程gems:
jruby -S gem list -r
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但是当我去安装宝石时,我得到了404:
jruby -S gem install rails
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除了维护内部gem存储库之外,还有解决此问题的好方法吗?
我在这里疯了.我查看了以下条目,但没有一个能纠正我看到的异常行为:
我也看过了,并确认了我的设置:http: //www.asp.net/AJAX/documentation/live/ConfiguringASPNETAJAX.aspx
这是我的代码(ASMX代码背后):
namespace RivWorks.Web.Services
{
/// <summary>
/// Summary description for Negotiate
/// </summary>
[WebService(Namespace = "http://rivworks.com/webservices/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ToolboxItem(false)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
[ScriptService]
public class Negotiate : System.Web.Services.WebService
{
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public RivWorks.Data.Objects.rivProduct GetSetup(string jsonInput)
{
// Deserialize the input and get all the data we need...
// TODO: …
Run Code Online (Sandbox Code Playgroud) 给出以下代码:
string[] colors = {"red","green","blue","red","green","blue"};
var distinctColors = (from c in colors select c).Distinct();
distinctColors.Dump();
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是否可以将调用折叠.Distinct()
为嵌入式查询语法?
比如int T-SQL
select distinct color from TableofColors
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var list = from book in books
where book.price > 50
select book;
list = list.Take(50);
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我希望上面的内容能够生成:
SELECT top 50 id, title, price, author
FROM Books
WHERE price > 50
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但它会产生:
SELECT
[Limit1].[C1] as [C1]
[Limit1].[id] as [Id],
[Limit1].[title] as [title],
[Limit1].[price] as [price],
[Limit1].[author]
FROM (SELECT TOP (50)
[Extent1].[id] as as [Id],
[Extent1].[title] as [title],
[Extent1].[price] as [price],
[Extent1].[author] as [author]
FROM Books as [Extent1]
WHERE [Extent1].[price] > 50
) AS [Limit1]
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为什么上面的linq查询生成一个子查询,C1来自哪里?
我遇到的情况是,我使用的第 3 方开源产品在 Oracle 中的游标用完并收到错误消息:java.sql.SQLException: ORA-01000: maximum open cursors exceeded
我的最大游标设置为 1000,我试图弄清楚达到此限制的代码是否做错了什么,或者我是否只需要增加我的限制。
经过一番调查,我在代码中发现了一个创建 ResultSet 的点,从而将我的打开游标计数增加了 1。但是,该 ResultSet 在使用后很快就关闭了......但游标计数保持不变。我能够在 3rd 方开源项目之外的简单 JDBC 应用程序中重现逻辑。
package gov.nyc.doitt.cursor;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class CursorTest {
public static void main(String[] args) {
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs = null;
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
conn = DriverManager.getConnection("jdbc:oracle:thin:@myhost:1537:mydb", "username", "password");
// as expected: there are 0 cursors associated with my session at this point
ps = …
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