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What is the purpose of the -m switch?
...switch -m to allow modules to be located using the Python module namespace for execution as scripts. The motivating examples were standard library modules such as pdb and profile, and the Python 2.4 implementation is fine for this limited purpose.
So you can specify any module in Python's search p...
Class with Object as a parameter
...nt(dir(NewStyle))
# ['__class__', '__delattr__', '__dict__', '__doc__', '__format__', '__getattribute__', '__hash__', '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '__weakref__']
Also, properties and supe...
Why does this loop produce “warning: iteration 3u invokes undefined behavior” and output more than 4
... not mathematically defined or not in the range of
representable values for its type, the behavior is undefined. [ Note: most existing implementations of C++
ignore integer overflows. Treatment of division by zero, forming a remainder using a zero divisor, and all
floating point exceptions...
__lt__ instead of __cmp__
...class (or a metaclass, or a class decorator if your taste runs that way).
For example:
class ComparableMixin:
def __eq__(self, other):
return not self<other and not other<self
def __ne__(self, other):
return self<other or other<self
def __gt__(self, other):
return oth...
Understanding __get__ and __set__ and Python descriptors
...ying to understand what Python's descriptors are and what they are useful for. I understand how they work, but here are my doubts. Consider the following code:
...
Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
I was looking for the fastest way to popcount large arrays of data. I encountered a very weird effect: Changing the loop variable from unsigned to uint64_t made the performance drop by 50% on my PC.
...
oracle10g 网址收藏 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...
Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for Microsoft Windows (32-bit)
http://download.oracle.com/otn/nt/oracle10g/10201/10201_database_win32.zip
http://download.oracle.com/otn/nt/oracle10g/10201/10201_client_win32.zip
http://download.oracle.com/otn/nt/oracle...
Finding what methods a Python object has
...
For many objects, you can use this code, replacing 'object' with the object you're interested in:
object_methods = [method_name for method_name in dir(object)
if callable(getattr(object, method_name))]
I ...
Does Python have a string 'contains' substring method?
I'm looking for a string.contains or string.indexof method in Python.
10 Answers
1...
Is there any difference between __DIR__ and dirname(__FILE__) in PHP?
It looks the same for me,but I'm not sure,
1 Answer
1
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