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How to access object attribute given string corresponding to name of that attribute
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There are built-in functions called getattr and setattr
getattr(object, attrname)
setattr(object, attrname, value)
In this case
x = getattr(t, 'attr1')
setattr(t, 'attr1', 21)
share
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Super-simple example of C# observer/observable with delegates
...re's an example:
using System;
class Observable
{
public event EventHandler SomethingHappened;
public void DoSomething() =>
SomethingHappened?.Invoke(this, EventArgs.Empty);
}
class Observer
{
public void HandleEvent(object sender, EventArgs args)
{
Console.Wri...
How to split a dos path into its components in Python
... program and I have to store this data in a variable. I am not sure how to convert data stored in a variable into "raw text".
– BeeBand
Jul 13 '10 at 14:29
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How to force a Solution file (SLN) to be opened in Visual Studio 2013?
...m was different. I had a VS 2012 solution (several actually) and wanted to convert them to 2013 (which I understand is a trivial change to the .sln file, but I wanted it done automatically in case there was some secret upgrade logic I was unaware of).
So I thought I would open it in VS2013, it woul...
Slicing of a NumPy 2d array, or how do I extract an mxm submatrix from an nxn array (n>m)?
...ce a NumPy nxn array. I want to extract an arbitrary selection of m rows and columns of that array (i.e. without any pattern in the numbers of rows/columns), making it a new, mxm array. For this example let us say the array is 4x4 and I want to extract a 2x2 array from it.
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SELECT DISTINCT on one column
....WHERE SKU LIKE 'FOO%') a WHERE a.RowNumber = 1
– Andre Nel
Jun 21 '17 at 11:46
This works although it's not a CTE ...
PSQLException: current transaction is aborted, commands ignored until end of transaction block
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I got this error using Java and PostgreSQL doing an insert on a table. I will illustrate how you can reproduce this error:
org.postgresql.util.PSQLException: ERROR:
current transaction is aborted, commands ignored until end of transaction block
Summa...
Linq Syntax - Selecting multiple columns
...ct(x => new { x.EMAIL, x.ID });
AFAIK, the declarative LINQ syntax is converted to a method call chain similar to this when it is compiled.
UPDATE
If you want the entire object, then you just have to omit the call to Select(), i.e.
var employee = _db.EMPLOYEEs
.Where(x => x.EMAIL == g...
SQL/mysql - Select distinct/UNIQUE but return all columns?
... MySQL, if that's what you're using.)
You could fetch the distinct fields and stick to picking a single arbitrary row each time.
On some platforms (e.g. PostgreSQL, Oracle, T-SQL) this can be done directly using window functions:
select *
from (
select *,
row_number() over (partition...
How can I add new keys to a dictionary?
...values at the same time, as long as the keys are strings (since kwargs are converted to strings). dict.update can also take another dictionary, but I personally prefer not to explicitly create a new dictionary in order to update another one.
– bgusach
Feb 13 '1...