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Threading pool similar to the multiprocessing Pool?
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I just found out that there actually is a thread-based Pool interface in the multiprocessing module, however it is hidden somewhat and not properly documented.
It can be imported via
from multiprocessing.pool import ThreadPool
It is implemented using a...
Explaining Python's '__enter__' and '__exit__'
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Using these magic methods (__enter__, __exit__) allows you to implement objects which can be used easily with the with statement.
The idea is that it makes it easy to build code which needs some 'cleandown' code executed (think of it as a try-finally block). Some more ex...
Can a class extend both a class and implement an Interface
...ll also change. Second, inheritance is used to SPECIALIZE, not EXTEND with extra functionality. This is the most misunderstood thing in OOP. As a rule of thumb I tend to extend abstract classes only.
– Michał Rudnicki
Mar 16 '09 at 21:25
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'Contains()' workaround using Linq to Entities?
...e is the code that I used to generate some e-sql from a collection, YMMV:
string[] ids = orders.Select(x=>x.ProductID.ToString()).ToArray();
return CurrentDataSource.Products.Where("it.ID IN {" + string.Join(",", ids) + "}");
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How can I return pivot table output in MySQL?
...ards. Note that SUM() can only work with numeric data if you ned to pivot strings you will have to use MAX()
– Raymond Nijland
Mar 25 '19 at 16:25
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Preserve Line Breaks From TextArea When Writing To MySQL
...ons for this:
PHP function nl2br():
e.g.,
echo nl2br("This\r\nis\n\ra\nstring\r");
// will output
This<br />
is<br />
a<br />
string<br />
Wrap the input in <pre></pre> tags.
See: W3C Wiki - HTML/Elements/pre
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How to insert a SQLite record with a datetime set to 'now' in Android application?
...ravitamada', 'datetime()'");
Method 3
Using java Date functions
private String getDateTime() {
SimpleDateFormat dateFormat = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss", Locale.getDefault());
Date date = new Date();
return dateFormat.format(date);
}
Conten...
How can I make a time delay in Python? [duplicate]
...print less frequently than that, because it takes time to print and handle all the buffers that entails (possibly doing a kernel context switch), and to register the alarm signal, but... yeah. A little under once per minute.
– Parthian Shot
Jun 17 '15 at 19:29
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Getting Django admin url for an object
...e was an easy way to get the admin url of an object, and I had written a small filter that I'd use like this: <a href="{{ object|admin_url }}" .... > ... </a>
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Python multiprocessing pool.map for multiple arguments
...rmap method, which accepts a sequence of argument tuples. It then automatically unpacks the arguments from each tuple and passes them to the given function:
import multiprocessing
from itertools import product
def merge_names(a, b):
return '{} & {}'.format(a, b)
if __name__ == '__main__':...