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Python Logging (function name, file name, line number) using a single file
I am trying to learn how an application works. And for this I am inserting debug commands as the first line of each function's body with the goal of logging the function's name as well as the line number (within the code) where I send a message to the log output. Finally, since this application comp...
Python division
... - 10)
-0.1111111111111111
or from __future__ import division, which the forces / to adopt Python 3.x's behavior that always returns a float.
>>> from __future__ import division
>>> (10 - 20) / (100 - 10)
-0.1111111111111111
...
How do I check which version of NumPy I'm using?
...
well, this works for most well-written python packages.
– fast tooth
Oct 23 '14 at 3:02
1
...
Why is early return slower than else?
... figured out an easy way to check whether it is right, but I have a theory for you.
I tried your code and get the same of results, without_else() is repeatedly slightly slower than with_else():
>>> T(lambda : without_else()).repeat()
[0.42015745017874906, 0.3188967452567226, 0.31984281521...
What is a good pattern for using a Global Mutex in C#?
..., false).
GetValue(0)).Value.ToString();
// unique id for global mutex - Global prefix means it is global to the machine
string mutexId = string.Format( "Global\\{{{0}}}", appGuid );
// Need a place to store a return value in Mutex() constructor call
bool createdNew...
'is' versus try cast with null check
...eds to be cast a second time
// before using it as a MyType
...
}
to this:
var myObjRef = myObj.myProp as MyType; // only one cast
if (myObjRef != null)
{
// myObjRef is already MyType and doesn't need to be cast again
...
}
C# 7.0 supports...
Convert any object to a byte[]
...
Use the BinaryFormatter:
byte[] ObjectToByteArray(object obj)
{
if(obj == null)
return null;
BinaryFormatter bf = new BinaryFormatter();
using (MemoryStream ms = new MemoryStream())
{
bf.Serialize(ms, obj);...
How to change a module variable from another module?
... change that.
This is one of the dangers of using the from foo import bar form of the import statement: it splits bar into two symbols, one visible globally from within foo which starts off pointing to the original value and a different symbol visible in the scope where the import statement is exec...
C++使用OLE/COM高速读写EXCEL的源码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ication.14")//Excel 2010
};
CLSID clsid;
HRESULT hr = S_FALSE;
for (int i= sizeof(ptchsExcel)/sizeof(*ptchsExcel)-1;i>=0;i--)
{
#if 0
if (m_app.CreateDispatch(ptchsExcel[i],NULL))
{
break;
}
等同于下面的操作
#else
hr = CLSIDFromProgID(ptchsExcel[i], &c...
What would a “frozen dict” be?
...he most common reason to want such a type is when memoizing function calls for functions with unknown arguments. The most common solution to store a hashable equivalent of a dict (where the values are hashable) is something like tuple(sorted(kwargs.iteritems())).
This depends on the sorting not be...