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enum - getting value of enum on string conversion
...d a __str__ method to your enum, if all you wanted was to provide a custom string representation:
class D(Enum):
def __str__(self):
return str(self.value)
x = 1
y = 2
Demo:
>>> from enum import Enum
>>> class D(Enum):
... def __str__(self):
... ...
How to make a chain of function decorators?
...udes the function functools.wraps(), which copies the name, module, and docstring of the decorated function to its wrapper.
(Fun fact: functools.wraps() is a decorator! ☺)
# For debugging, the stacktrace prints you the function __name__
def foo():
print("foo")
print(foo.__name__)
#outputs:...
How do I install a custom font on an HTML site
... answered Dec 27 '17 at 23:56
Richard StitzRichard Stitz
6111 silver badge44 bronze badges
...
Is Java “pass-by-reference” or “pass-by-value”?
... easily confuse many beginners.
It goes like this:
public static void main(String[] args) {
Dog aDog = new Dog("Max");
Dog oldDog = aDog;
// we pass the object to foo
foo(aDog);
// aDog variable is still pointing to the "Max" dog when foo(...) returns
aDog.getName().equals("...
Correct format specifier to print pointer or address?
...tr_t) cast is unambiguously recommended by GCC when it can read the format string at compile time. I think it is correct to request the cast, though I'm sure there are some who would ignore the warning and get away with it most of the time.
Kerrek asks in the comments:
I'm a bit confused abo...
Line continuation for list comprehensions or generator expressions in python
...t appears at the end of a line, where it either doesn't stand out or needs extra padding, which has to be fixed when line lengths change:
x = very_long_term \
+ even_longer_term_than_the_previous \
+ a_third_term
In such cases, use parens:
x = (very_long_term
+ even_...
Linux进程与线程总结 [推荐] - C/C++ - 清泛网 - 专注C/C++及内核技术
...数：
#include <sys/types.h>
#include <sys/stat.h>
int mkfifo(const char * pathname, mode_t mode)
第一个参数即为路径名，第二个参数为文件属性，包括打开方式、访问权限等，Linux下有很多函数使用该类型的参数，如参数值“O_CREAT | O_EXCL | 0666...
Is it possible for a computer to “learn” a regular expression by user-provided examples?
...
Yes, it's certainly "possible"; Here's the pseudo-code:
string MakeRegexFromExamples(<listOfPosExamples>, <listOfNegExamples>)
{
if HasIntersection(<listOfPosExamples>, <listOfNegExamples>)
return <IntersectionError>
string regex = "";
...
How to create EditText with rounded corners? [closed]
...ent"
android:layout_height="wrap_content"
android:text="@string/hello"
android:background="@drawable/rounded_edittext_states"
android:padding="5dip" />
</LinearLayout>
share
...
What to do Regular expression pattern doesn't match anywhere in string?
...lt;quote>
}{$+{BODY}}six;
return $_;
}
sub descape {
my $string = $_[0];
for my $_ ($string) {
s{
(?<! % )
% ( \p{Hex_Digit} {2} )
}{
chr hex $1;
}gsex;
s{
& \043
( [0-9]+ )
...