我正在尝试使用我的 python 脚本(在本地运行)连接到 mysql 数据库(托管在媒体神庙上),但在运行时收到错误。
错误是:
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/mysql/connector/connection_cext.py", line 179, in _open_connection
self._cmysql.connect(**cnx_kwargs)
_mysql_connector.MySQLInterfaceError: Bad handshake
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/Users/Charlie/Documents/python/myscript/mysql_insert.py", line 8, in <module>
port="3306"
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/mysql/connector/__init__.py", line 172, in connect
return CMySQLConnection(*args, **kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/mysql/connector/connection_cext.py", line 78, in __init__
self.connect(**kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/mysql/connector/abstracts.py", line 735, in connect
self._open_connection()
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/mysql/connector/connection_cext.py", line 182, in _open_connection
sqlstate=exc.sqlstate)
mysql.connector.errors.OperationalError: 1043 (08S01): Bad handshake
Run Code Online (Sandbox Code Playgroud)
这是脚本中的代码
import mysql.connector …
Run Code Online (Sandbox Code Playgroud) 我已经通过示例 REST/HTTP 请求模拟实现了一个基本的 WireMock。服务器代码实现如下。
使用此代码,当我从 Postman 发出 GET 请求(即 GET http://127.0.0.1:8089/some/thing)时出现以下错误。
由于此 WireMock 实例中没有存根映射,因此无法提供响应。
我的设置/代码中缺少什么?
import com.github.tomakehurst.wiremock.WireMockServer;
import com.github.tomakehurst.wiremock.core.WireMockConfiguration;
public class MockApp {
private WireMockServer wireMockServer;
public MockApp(String testSpec) {
wireMockServer = new WireMockServer(WireMockConfiguration.options().
port(8089).
usingFilesUnderDirectory(testSpec).
disableRequestJournal());
}
public void start() {
wireMockServer.start();
}
public void stop() {
wireMockServer.stop();
}
}
Run Code Online (Sandbox Code Playgroud)
主要功能是:
public class MockMain {
public static void main(String[] args) {
String baseDir = System.getProperty("user.dir");
String testResource = baseDir + "/resources/testconfig/";
MockAMS mockAMS = new MockAMS(testResource);
mockAMS.start();
} …
Run Code Online (Sandbox Code Playgroud) 我不确定该yield
功能的目的是什么。
你能检查我有这个例子吗?
无论如何,我在这里跟随一个例子。
这是代码:
val job = launch {
val child = launch {
try {
delay(Long.MAX_VALUE)
} finally {
println("Child is cancelled")
}
}
yield() //why do i need this ???????
println("Cancelling child")
child.cancel()
child.join()
yield()
println("Parent is not cancelled")
}
job.join()
Run Code Online (Sandbox Code Playgroud)
当我注释掉第一个收益率时,我得到以下结果:
取消孩子
父母未取消
但是如果我保持原样,我会得到:
取消孩子
儿童被取消
父母未取消
yield
在这里使用是什么意思?
我有兴趣将 SQL 查询的结果(如SELECT
语句)保存为 SSMS 中的管道 ( |
) 分隔文本文件。
我可以使用导出向导来做到这一点。
但是,似乎有一种更简单的方法,可以在Tools>Options
下面设置“自定义分隔符” Query Results>SQL Server>Results to Text
,如下所示:
然后,如果我指定"Results to Text"
or "Results to File"
,我应该得到管道分隔的结果。
此处也概述了这一点:使用 SSMS 从 SQL Server 获取管道分隔结果
但是,这样做我仍然得到通常的输出,即结果到文本或文件。
我不知道我错过了什么或做错了什么。
感谢您的帮助。
我正试图从本文翻译成F#代码http://www.codeproject.com/Articles/35532/C-COM-Object-for-Use-In-JavaScript-HTML-Including
我偶然发现了这条线:
public delegate void MyFirstEventHandler(string args);
public event MyFirstEventHandler MyFirstEvent;
Run Code Online (Sandbox Code Playgroud)
我试图用F#翻译这个:
type MyFirstEventHandler = delegate of string -> unit
type MyFsComComponent () =
let my_event = new Event<MyFirstEventHandler,string> ()
[<CLIEvent>]
member x.MyFirstEvent = my_event.Publish
Run Code Online (Sandbox Code Playgroud)
我得到:'MyFirstEventHandler'有一个非标准的委托
我可以编译:
type MyFirstEventHandler = delegate of obj*string -> unit
Run Code Online (Sandbox Code Playgroud)
但这不是COM控制所需要的.
这个问题也在C#中提到了F#类过渡 - "公共事件"仍然没有解决方案
解决了.感谢Leaf Garland
type MyFirstEventHandler = delegate of string -> unit
type MyFsComComponent () =
let my_event = new DelegateEvent<MyFirstEventHandler> ()
[<CLIEvent>]
member x.MyFirstEvent = my_event.Publish
Run Code Online (Sandbox Code Playgroud)
诀窍.
我一直在尝试将包含已标记化单词的 pandas 数据框转换为二元组,但我没有成功。我尝试了多个代码,但我要么不断收到错误消息,要么收到奇怪的答案。我大约两周前才开始使用 python,我真的很挣扎。任何帮助,将不胜感激。谢谢
这是我到目前为止所尝试过的。
from nltk.util import ngrams
generic_tweets['bigrams'] = generic_tweets['tweet'].apply(lambda row: list(map(lambda x:ngrams(x,2), row)))
generic_tweets['bigrams'].head()
Run Code Online (Sandbox Code Playgroud)
在哪里
generic_tweets['tweet'].head()
0 [awww, thats, bummer, shoulda, got, david, car...
1 [upset, that, he, cant, update, his, facebook,...
2 [dived, many, time, ball, managed, save, rest,...
3 [whole, body, feel, itchy, like, it, on, fire]
4 [no, it, not, behaving, at, all, im, mad, why,...
5 [not, whole, crew]
6 [need, hug]
Run Code Online (Sandbox Code Playgroud)
我想要的是
0 [(awww, thats), (thats, bummer), (bummer, shoulda)...
1 [(upset, that), …
Run Code Online (Sandbox Code Playgroud) 正如标题所说,为什么挂起函数会抛出异常finally
?
对于常规函数,finally
-block 会执行所有函数:
import kotlinx.coroutines.*
fun main() {
val handler = CoroutineExceptionHandler { _, exception ->
println("Caught $exception")
}
val job = GlobalScope.launch(handler) {
launch {
// the first child
try {
println("inside try")
delay(1000)
} finally {
println("Children are cancelled, but exception is not handled until all children terminate")
Thread.sleep(1000)
println("thread.sleep executed")
//foo()
println("The first child finished its non cancellable block")
}
}
launch {
// the second child
delay(10)
println("Second child throws an exception") …
Run Code Online (Sandbox Code Playgroud)