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deciding among subprocess, multiprocessing, and thread in Python?
....
To understand how this is possible one should read about the features of select() (which can be built around the select() or poll() or similar OS system calls).
Basically it's all driven by the ability to make a request of the OS to sleep pending any activity on a list of file descriptors or some ...
How to use PyCharm to debug Scrapy projects
...
As of 2018.1 this became a lot easier. You can now select Module name in your project's Run/Debug Configuration. Set this to scrapy.cmdline and the Working directory to the root dir of the scrapy project (the one with settings.py in it).
Like so:
Now you can add breakpoin...
How to disable mouseout events triggered by child elements?
...;div style="display:none;">
<input>Test</input>
<select>
<option>Option 1</option>
<option>Option 2</option>
</select>
</div>
</div>
Then, you could do something like this:
$('#hoverable').hover( function() {...
Find and Replace text in the entire table using a MySQL query
...his_text";
$replace = "replace_with_this_text";
$loop = mysql_query("
SELECT
concat('UPDATE ',table_schema,'.',table_name, ' SET ',column_name, '=replace(',column_name,', ''{$find}'', ''{$replace}'');') AS s
FROM
information_schema.columns
WHERE
table_schema = '{...
Command-line svn for Windows?
...art the T SVN installer and choose "Modify". Then add the client in to the selection of parts that should be installed.
– Jpsy
Mar 21 '18 at 8:26
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Check if a value exists in pandas dataframe index
...ues or the index by appending the ".values" method, e.g.
g in df.<your selected field>.values
g in df.index.values
I find that adding the ".values" to get a simple list or ndarray out makes exist or "in" checks run more smoothly with the other python tools. Just thought I'd toss that out th...
SQL : BETWEEN vs =
...tion.
Use an alternative longer syntax where BETWEEN doesn't work e.g.
Select EventId,EventName from EventMaster
where EventDate >= '10/15/2009' and EventDate < '10/18/2009'
(Note < rather than <= in second condition.)
...
How to access random item in list?
... isn't repeated? Let's say I wanted to shuffle a deck of cards by randomly selecting one at a time, but obviously can't select the same card twice.
– AdamMc331
Sep 21 '14 at 5:26
7...
Reorder / reset auto increment primary key
...riable, this is okay: SET @a = @a + 1; For other statements, such as SELECT, you might get the results you expect, but this is not guaranteed. In the following statement, you might think that MySQL will evaluate @a first and then do an assignment second: SELECT @a, @a:=@a+1, ...; However...
How do I open an old MVC project in Visual Studio 2012 or Visual Studio 2013?
... modify the project file. To do so right click on the unloaded project and select Edit. Which will open the project file as an XML text file. Find the ProjectTypeGuids node which should look something like this:
<ProjectTypeGuids>
{F85E285D-A4E0-4152-9332-AB1D724D3325};{349c5851-65df-11da...