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__attribute__ - C/C++ - 清泛网 - 专注C/C++及内核技术
...nt(const char *format,...) __attribute__((format(printf,1,2)));
//m=2；n=3
extern void myprint(int l，const char *format,...)
__attribute__((format(printf,2,3)));
需要特别注意的是，如果myprint是一个函数的成员函数，那么m和n的值可有点“悬乎”了，例如：
//...
How to make an immutable object in Python?
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edited May 23 '17 at 12:34
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answered Jan 28 '11 at 13:39
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Overloading Macro on Number of Arguments
I have two macros FOO2 and FOO3 :
8 Answers
8
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Python extending with - using super() Python 3 vs Python 2
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super() (without arguments) was introduced in Python 3 (along with __class__):
super() -> same as super(__class__, self)
so that would be the Python 2 equivalent for new-style classes:
super(CurrentClass, self)
for old-style classes you can always use:
class Classname...
How to properly assert that an exception gets raised in pytest?
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352
pytest.raises(Exception) is what you need.
Code
import pytest
def test_passes():
with p...
Get exception description and stack trace which caused an exception, all as a string
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653
See the traceback module, specifically the format_exc() function. Here.
import traceback
try:
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Are static class variables possible in Python?
...od are class or static variables:
>>> class MyClass:
... i = 3
...
>>> MyClass.i
3
As @millerdev points out, this creates a class-level i variable, but this is distinct from any instance-level i variable, so you could have
>>> m = MyClass()
>>> m.i = 4
&g...
What would a “frozen dict” be?
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edited May 31 at 7:25
answered Apr 24 '10 at 14:52
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