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Python logging: use milliseconds in time format
...ure why you're getting the logger when you can just call logging.info(msg) etc, but the format is exactly what I was looking for. Anyone else looking for all the usable attributes can look here: docs.python.org/3.6/library/logging.html#logrecord-attributes
– naphier
...
Writing a Python list of lists to a csv file
...you wanted to do it manually (without using a module like csv,pandas,numpy etc.):
with open('myfile.csv','w') as f:
for sublist in mylist:
for item in sublist:
f.write(item + ',')
f.write('\n')
Of course, rolling your own version can be error-prone and inefficient ...
How to get an enum value from a string value in Java?
...s null again and the caller of the caller again has to check against NULL, etc. etc.
– raudi
Feb 2 '12 at 7:52
10
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Generate class from database table
...ea to decorate each of the properties with attributes for DataAnnotations, etc., but I'm keeping this strictly POCO.
EDIT
Fixed for TimeStamp and Guid?
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How to pull a random record using Django's ORM?
...Painting.objects method is a manager that contains all(), filter(), get(), etc. Creating your own manager allows you to pre-filter results and have all these same methods, as well as your own custom methods, work on the results.
EDIT: I modified my code to reflect the order_by['?'] method. Note t...
What is the best algorithm for overriding GetHashCode?
... just wrap
{
int hash = 17;
// Suitable nullity checks etc, of course :)
hash = hash * 23 + field1.GetHashCode();
hash = hash * 23 + field2.GetHashCode();
hash = hash * 23 + field3.GetHashCode();
return hash;
}
}
As noted in comments, you may...
App Inventor 2 能否实现后台推送通知？源码级深度调研 - App应用开发 - 清...
背景：微信群用户提问
AI2 能否实现类似 uni-push 的后台推送通知？手机开机不打开 App 就能自动读取云端数据。
以下是源码级深度调研结果。
一、推送通知的工作原理
系统级推送（真推送）
服务器 -> FCM/APNs 云...
Converting integer to string in Python
...to
a.__str__()
The same if you want to convert something to int, float, etc.
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Position of least significant bit that is set
... set bit, or the highest set bit, or counting the number of leading zeroes etc.
If you have any one instruction of this class you can cheaply emulate the others.
Take a moment to work through it on paper and realise that x & (x-1) will clear the lowest set bit in x, and ( x & ~(x-1) ) will...
How does Django's Meta class work?
...her the model is abstract or not, singular and plural versions of the name etc.
Short explanation is here: Django docs: Models: Meta options
List of available meta options is here: Django docs: Model Meta options
For latest version of Django: Django docs: Model Meta options
Metaclass in Python:
...