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how to create a file name with the current date & time in python?
... human readable.
from datetime import datetime
datetime.now().strftime("%Y_%m_%d-%I_%M_%S_%p")
'2020_08_12-03_29_22_AM'
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Is it possible to make abstract classes in Python?
...
# Python 2
from abc import ABCMeta, abstractmethod
class Abstract:
__metaclass__ = ABCMeta
@abstractmethod
def foo(self):
pass
Whichever way you use, you won't be able to instantiate an abstract class that has abstract methods, but will be able to instantiate a subclass th...
基于PECL OAuth打造微博应用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...腾讯，搜狐，网易）的开发者，拿到属于你自己的CONSUMER_KEY和CONSUMER_SECRET（有时也被称作APP_*）。
下面开始！假定我们要开发一个类似Follow5和微博通的应用，简单点说就是把消息同时发送到多个微博平台，出于安全性的考虑，...
Use of *args and **kwargs [duplicate]
...number of arguments to your function. For example:
>>> def print_everything(*args):
for count, thing in enumerate(args):
... print( '{0}. {1}'.format(count, thing))
...
>>> print_everything('apple', 'banana', 'cabbage')
0. apple
1. banana
2. cabbage
Similarly, *...
What is the difference between exit and return? [duplicate]
... return at the end of the function.
Last point, exit() come in two flavors _exit() and exit(). The difference between the forms is that exit() (and return from main) calls functions registered using atexit() or on_exit() before really terminating the process while _exit() (from #include <unistd....
How to write to a file, using the logging Python module?
...
make sure this is not under if __name__ == '__main__': if running on apache
– Rami Alloush
Apr 14 '19 at 19:08
...
Why would one use nested classes in C++?
...e();
void publicInterface2();
private:
struct Impl;
std::unique_ptr<Impl> impl;
}
X.cpp:
#include "X.h"
#include <windows.h>
struct X::Impl {
HWND hWnd; // this field is a part of the class, but no need to include windows.h in header
// all private fields, methods...
undefined reference to `WinMain@16'
...>
int main()
{
MessageBox( 0, "Blah blah...", "My Windows app!", MB_SETFOREGROUND );
}
Now let's build it using GNU toolchain (i.e. g++), no special options. Here gnuc is just a batch file that I use for that. It only supplies options to make g++ more standard:
C:\test> gnuc x.cpp
C:...
Entity Framework rollback and remove bad migration
...g migrations that have been applied to the target database.
201508242303096_Bad_Migration
201508211842590_The_Migration_applied_before_it
201508211440252_And_another
This list shows the most recent applied migrations first. Pick the migration that occurs in the list after the one you want to downgr...
What is the meaning of single and double underscore before an object name?
...owever, nothing special is done with the name itself.
To quote PEP-8:
_single_leading_underscore: weak "internal use" indicator. E.g. from M import * does not import objects whose name starts with an underscore.
Double Underscore (Name Mangling)
From the Python docs:
Any identifier of th...