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Error: “dictionary update sequence element #0 has length 1; 2 is required” on Django 1.4
...a keyword argument name with value as your view name e.g home or home-view etc. to url() function.
Throws Error»
url(r'^home$', 'common.views.view1', 'home'),
Correct»
url(r'^home$', 'common.views.view1', name='home'),
...
Creating dataframe from a dictionary where entries have different lengths
... transpose the result and/or change the column data types (float, integer, etc).
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Combining two expressions (Expression)
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Well, you can use Expression.AndAlso / OrElse etc to combine logical expressions, but the problem is the parameters; are you working with the same ParameterExpression in expr1 and expr2? If so, it is easier:
var body = Expression.AndAlso(expr1.Body, expr2.Body);
var lam...
Difference between Dictionary and Hashtable [duplicate]
... collection is that it does boxing automatically for your values and
in order to get your original value you need to perform unboxing ,
these to decrease your application performance as penalty.
Dictionary: This is generic type of collection where no implicit
boxing, so no need to unboxi...
Checking if sys.argv[x] is defined
...s as the first argument each time and 2) you can call results with args[0] etc.
– Matt D
Nov 28 '17 at 3:23
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Outline radius?
...moz-outline-radius properly, but that won't work on IE/Chrome/Safari/Opera/etc. So, it looks like the most cross-browser-compatible way* to get a curved line around a border is to use a wrapper div:
div.inner {
-webkit-border-radius: 10px;
-moz-border-radius: 10px;
border-radius: 10px;
b...
How can I record a Video in my Android App.?
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Here is a simple video recording example using the MediaRecorder:
public class VideoCapture extends Activity implements OnClickListener, SurfaceHolder.Callback {
MediaRecorder recorder;
SurfaceHolder holder;
boolean recording = false;
@Override
public void onCrea...
Omitting all xsi and xsd namespaces when serializing an object in .NET?
...and replaced it with what follows:
// You have to use this constructor in order for the root element to have the right namespaces.
// If you need to do custom serialization of inner objects, you can use a shortened constructor.
XmlSerializer xs = new XmlSerializer(typeof(MyTypeWithNamespaces), new ...
Common use-cases for pickle in Python
...le, you can't send it to the other resources on another process, computer, etc. Also see here for a good example.
To do this, I use dill, which can serialize almost anything in python. Dill also has some good tools for helping you understand what is causing your pickling to fail when your code fai...
How do you do Impersonation in .NET?
...e System.Security.Principal namespace:
Newer code (.NET 4.6+, .NET Core, etc.) should generally use WindowsIdentity.RunImpersonated, which accepts a handle to the token of the user account, and then either an Action or Func<T> for the code to execute.
WindowsIdentity.RunImpersonated(tokenHa...