大约有 40,000 项符合查询结果(耗时:0.0237秒) [XML]

https://stackoverflow.com/ques... 

Why is parenthesis in print voluntary in Python 2.7?

... In Python 2.x print is actually a special statement and not a function*. This is also why it can't be used like: lambda x: print x Note that (expr) does not create a Tuple (it results in expr), but , does. This likely results in the confusion between...
https://stackoverflow.com/ques... 

How to include external Python code to use in other files?

...ods in a file, is there a way to include those files in another file, but call them without any prefix (i.e. file prefix)? ...
https://stackoverflow.com/ques... 

What does the Q_OBJECT macro do? Why do all Qt objects need this macro?

I just started using Qt and noticed that all the example class definitions have the macro Q_OBJECT as the first line. What is the purpose of this preprocessor macro? ...
https://stackoverflow.com/ques... 

How to create a custom string representation for a class object?

... @RobertSiemer Why? While his answer is not specifically targeting the OP's question, it's still helpful. It helped me. And at a glance, I don't see any question asking for instance implementation. So probably people land on this page first. – akinuri ...
https://stackoverflow.com/ques... 

Get class name of django model

... Django models are derived from the ModelBase, which is the Metaclass for all models. share | improve this answer | follow | ...
https://stackoverflow.com/ques... 

How to check if all elements of a list matches a condition?

... The best answer here is to use all(), which is the builtin for this situation. We combine this with a generator expression to produce the result you want cleanly and efficiently. For example: >>> items = [[1, 2, 0], [1, 2, 0], [1, 2, 0]] >>...
https://stackoverflow.com/ques... 

What does “mro()” do?

...very attribute you get on a class's instance, not just methods, is conceptually looked up along the __mro__, so, if more than one class among the ancestors defines that name, this tells you where the attribute will be found -- in the first class in the __mro__ that defines that name. ...
https://stackoverflow.com/ques... 

Difference between shared objects (.so), static libraries (.a), and DLL's (.so)?

... and shared objects are just different terms for the same thing - Windows calls them DLLs, while on UNIX systems they're shared objects, with the general term - dynamically linked library - covering both (even the function to open a .so on UNIX is called dlopen() after 'dynamic library'). They are ...
https://stackoverflow.com/ques... 

How to make an array of arrays in Java

Hypothetically, I have 5 string array objects: 4 Answers 4 ...
https://stackoverflow.com/ques... 

Warning “Do not Access Superglobal $_POST Array Directly” on Netbeans 7.4 for PHP

...rning may disappear, but if you don't specify a filter then you will not really fix the security issue NetBeans is pointing out. For example, if you are expecting an int, use: filter_input(INPUT_POST, 'var_name', FILTER_SANITIZE_NUMBER_INT) – HoffZ Jul 18 '14 a...