大约有 43,000 项符合查询结果（耗时：0.0702秒） [XML]
pandas GroupBy columns with NaN (missing) values
...s far result in potentially dangerous behavior as it is quite possible you select a dummy value that is actually part of the dataset. This is increasingly likely as you create groups with many attributes. Simply put, the approach doesn't always generalize well.
A less hacky solve is to use pd.drop_...
Gmail Error :The SMTP server requires a secure connection or the client was not authenticated. The s
... Yes, the reason is 2 steps verification switched On for gmail account. Select App/Device and click Generate button support.google.com/accounts/answer/185833
– smily
Dec 25 '15 at 15:34
...
Remove blue border from css custom-styled button in Chrome
...
I just remove the outline from all the tags in the page by selecting all and applying outline:none to everything:)
*:focus {outline:none}
As bagofcole mentioned, you might need to add !important as well, so the style will look like this:
*:focus {outline:none !important}
...
Total memory used by Python process?
... import os
from wmi import WMI
w = WMI('.')
result = w.query("SELECT WorkingSet FROM Win32_PerfRawData_PerfProc_Process WHERE IDProcess=%d" % os.getpid())
return int(result[0].WorkingSet)
On Linux (from python cookbook http://code.activestate.com/recipes/286222/:
import os
_proc_...
Placeholder Mixin SCSS/CSS
...nnested:
@mixin optional-at-root($sel) {
@at-root #{if(not &, $sel, selector-append(&, $sel))} {
@content;
}
}
@mixin placeholder {
@include optional-at-root('::-webkit-input-placeholder') {
@content;
}
@include optional-at-root(':-moz-placeholder') {
@content;
}
...
Xcode stuck at “Your application is being uploaded”
...
@Andru: you can select mysticboy59's answer as correct so this topic will be closed. He did put some effort into it.
– Rok Jarc
Nov 15 '13 at 9:11
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How do I stop Notepad++ from showing autocomplete for all words in the file
...erences... > Auto-completion
Check Enable Auto-completion on each input
Select Function completion and not Word completion
Check Function parameter hint on input (if you have this option)
On version 6.5.5 of Notepad++, I have this setting
Some documentation about auto-completion is available ...
C# static class constructor
...y add &nbsp; and <br> for formatting. Paste your actual code and select it. And then click on {} in the stack overflow editor. It will add 4 spaces
– adiga
Apr 9 '19 at 6:54
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How to find elements with 'value=x'?
...ifferent values are located into #attached_docs , but I don't know how to select element with value="123" .
5 Answers
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Mark parameters as NOT nullable in C#/.NET?
... where o.Value == null
select o;
bool paramsNull = nullParams.Count() > 0;
if (paramsNull)
{
StringBuilder sb = new StringBuilder();
foreach (var param in nullParams)
...