大约有 11,000 项符合查询结果（耗时：0.0284秒） [XML]
Compelling examples of custom C++ allocators?
...
The original link is now defunct, but CiteSeer has the PDF: citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.71.8289
– Arto Bendiken
Apr 4 '13 at 1:06
...
Why not use HTTPS for everything?
...ooking through this: iweb.tntech.edu/hexb/publications/https-STAR-03122003.pdf "Once the server is saturated, the system performance of HTTPS achieves around 67% of HTTP in terms of throughput."
– WhirlWind
Apr 30 '10 at 17:09
...
Why can a function modify some arguments as perceived by the caller, but not others?
I'm trying to understand Python's approach to variable scope. In this example, why is f() able to alter the value of x , as perceived within main() , but not the value of n ?
...
How to check if an object is a list or tuple (but not string)?
...
In python 2 only (not python 3):
assert not isinstance(lst, basestring)
Is actually what you want, otherwise you'll miss out on a lot of things which act like lists, but aren't subclasses of list or tuple.
...
Is it acceptable and safe to run pip install under sudo?
I've started to use my Mac to install Python packages in the same way I do with my Windows PC at work; however on my Mac I've come across frequent permission denied errors while writing to log files or site-packages.
...
What is the use of “assert” in Python?
...condition, and immediately trigger an error if the condition is false.
In Python, it's roughly equivalent to this:
if not condition:
raise AssertionError()
Try it in the Python shell:
>>> assert True # nothing happens
>>> assert False
Traceback (most recent call last):
F...
How to comment out a block of code in Python [duplicate]
Is there a mechanism to comment out large blocks of Python code?
19 Answers
19
...
Twitter Bootstrap Form File Element Upload Button
...e because the button doesn't show the selected file name: jsfiddle.net/36o9pdf9/1
– danwild
Feb 22 '15 at 22:25
...
Iterating through a JSON object
..., json_object[0][song].
None of this is specific to JSON. It's just basic Python types, with their basic operations as covered in any tutorial.
share
|
improve this answer
|
...
Remove all the elements that occur in one list from another
...
Python has a language feature called List Comprehensions that is perfectly suited to making this sort of thing extremely easy. The following statement does exactly what you want and stores the result in l3:
l3 = [x for x in ...