大约有 45,000 项符合查询结果（耗时：0.0322秒） [XML]
Difference between __str__ and __repr__?
...Alex summarized well but, surprisingly, was too succinct.
First, let me reiterate the main points in Alex’s post:
The default implementation is useless (it’s hard to think of one which wouldn’t be, but yeah)
__repr__ goal is to be unambiguous
__str__ goal is to be readable
Container’s __s...
What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?
...
__func__ is an implicitly declared identifier that expands to a character array variable containing the function name when it is used inside of a function. It was added to C in C99. From C99 §6.4.2.2/1:
The identifier __func__ is implicitly d...
Elegant ways to support equivalence (“equality”) in Python classes
When writing custom classes it is often important to allow equivalence by means of the == and != operators. In Python, this is made possible by implementing the __eq__ and __ne__ special methods, respectively. The easiest way I've found to do this is the following method:
...
Python (and Python C API): __new__ versus __init__
...m about to ask seems to be a duplicate of Python's use of __new__ and __init__? , but regardless, it's still unclear to me exactly what the practical difference between __new__ and __init__ is.
...
Python __str__ versus __unicode__
...seen classes override __unicode__() more frequently than __str__() but it doesn't appear to be consistent. Are there specific rules when it is better to implement one versus the other? Is it necessary/good practice to implement both?
...
Optional Parameters with C++ Macros
Is there some way of getting optional parameters with C++ Macros? Some sort of overloading would be nice too.
14 Answers
...
Understanding Python super() with __init__() methods [duplicate]
I'm trying to understand the use of super() . From the looks of it, both child classes can be created, just fine.
7 Answe...
Calling parent class __init__ with multiple inheritance, what's the right way?
Say I have a multiple inheritance scenario:
9 Answers
9
...
Understanding the difference between __getattr__ and __getattribute__
...nce between __getattr__ and __getattribute__ , however, I am failing at it.
4 Answers
...
Relative imports in Python 2.7
... what directory a file is in does not determine what package Python thinks it is in. That depends, additionally, on how you load the file into Python (by running or by importing).
There are two ways to load a Python file: as the top-level script, or as a
module. A file is loaded as the top-level...