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How to add property to a class dynamically?
...ing on. Better late than never.
You can add a property to a class dynamically. But that's the catch: you have to add it to the class.
>>> class Foo(object):
... pass
...
>>> foo = Foo()
>>> foo.a = 3
>>> Foo.b = property(lambda self: self.a + 1)
>>&...
Declaring variables inside or outside of a loop
...
The scope of local variables should always be the smallest possible.
In your example I presume str is not used outside of the while loop, otherwise you would not be asking the question, because declaring it inside the while loop would not be an option, since it would not comp...
Why declare a struct that only contains an array in C?
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Linux下部署企业级邮件服务器(postfix + dovecot + extmail) - 开源 & Gith...
...uery OK, 0 rows affected (0.00 sec)
3、安装配置apache
yum install httpd -y
vim /etc/httpd/conf/httpd.conf
注释掉中心主机，启用虚拟主机
添加以下内容：
<VirtualHost *:80>
ServerName mail.huatuo.com
DocumentRoot /var/www/extmail/html/
ScriptA...
Difference between std::result_of and decltype
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how do you filter pandas dataframes by multiple columns
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Remove spaces from std::string in C++
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Can you use Boost String Algo? http://www.boost.org/doc/libs/1_35_0/doc/html/string_algo/usage.html#id1290573
erase_all(str, " ");
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Replace all non-alphanumeric characters in a string
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Use \W which is equivalent to [^a-zA-Z0-9_]. Check the documentation, https://docs.python.org/2/library/re.html
Import re
s = 'h^&ell`.,|o w]{+orld'
replaced_string = re.sub(r'\W+', '*', s)
output: 'h*ell*o*w*orld'
update: This solution will exclude underscore as well. If you want only ...
How can I handle time zones in my webapp?
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The majority of your users probably will not change timezones much, or at all. For the most part, the situation you outlined is uncommon. By implementing a dropdown with a suitable default, you should be able to make things easy enough for those who do move around (because they typically have a bet...
Return HTTP status code 201 in flask
...r one of our API's and I was just wondering if anyone knew how to return a HTTP response 201?
9 Answers
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