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Why return NotImplemented instead of raising NotImplementedError
Python has a singleton called NotImplemented .
4 Answers
4
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What is the syntax to insert one list into another list in python?
..., 2, 3, [4, 5, 6]]
foo.extend(bar) --> [1, 2, 3, 4, 5, 6]
http://docs.python.org/tutorial/datastructures.html
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When splitting an empty string in Python, why does split() return an empty list while split('\n') re
... gives two pieces. Making two cuts, gives three pieces.
And so it is with Python's str.split(delimiter) method:
>>> ''.split(',') # No cuts
['']
>>> ','.split(',') # One cut
['', '']
>>> ',,'.split(',') # Two cuts
['', '', '']
Question: And is there ...
Is nested function a good approach when required by only one function? [closed]
...defined or used.
Update:
Here's proof that nesting them is slower (using Python 3.6.1), although admittedly not by much in this trivial case:
setup = """
class Test(object):
def separate(self, arg):
some_data = self._method_b(arg)
def _method_b(self, arg):
return arg+1
...
C#位运算符（C#按位与、按位或 等） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...两个字节。如一个字节所剩空间不够存放另一位域时，应从下一单元起存放该位域。也可以有意使某位域从下一单元开始。例如：
struct bs
{
unsigned a:4
unsigned :0 /*空域*/
unsigned b:4 /*从下一单元开始存放*/
unsigned c...
tcp端口状态ESTABLISHED、TIME_WAIT、CLOSE_WAIT 、SYN_RECV等详解 - C/C++...
...接正确关闭
4、TIME_WAIT
我方主动调用close()断开连接，收到对方确认后状态变为TIME_WAIT。TCP协议规定TIME_WAIT状态会一直持续2MSL(即两倍的分 段最大生存期)，以此来确保旧的连接状态不会对新连接产生影响。处于TIME_WAIT状态的连...
PyCharm shows unresolved references error for valid code
...ghting my valid code with "unresolved reference" errors, even for built-in Python functions. Why don't these seem to be detected, even though the code runs? Is there any way to get PyCharm to recognize these correctly?
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Pass a parameter to a fixture function
I am using py.test to test some DLL code wrapped in a python class MyTester.
For validating purpose I need to log some test data during the tests and do more processing afterwards. As I have many test_... files I want to reuse the tester object creation (instance of MyTester) for most of my tests.
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Difference between staticmethod and classmethod
... function into a class because it logically belongs with the class. In the Python source code (e.g. multiprocessing,turtle,dist-packages), it is used to "hide" single-underscore "private" functions from the module namespace. Its use, though, is highly concentrated in just a few modules -- perhaps an...
How to check a string for specific characters?
How can I check if a string has several specific characters in it using Python 2?
5 Answers
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