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How to import classes defined in __init__.py
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'lib/'s parent directory must be in sys.path.
Your 'lib/__init__.py' might look like this:
from . import settings # or just 'import settings' on old Python versions
class Helper(object):
pass
Then the following exampl...
How to drop columns by name in a data frame
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You should use either indexing or the subset function. For example :
R> df <- data.frame(x=1:5, y=2:6, z=3:7, u=4:8)
R> df
x y z u
1 1 2 3 4
2 2 3 4 5
3 3 4 5 6
4 4 5 6 7
5 5 6 7 8
Then you can use the which function and the - operator in column index...
Handling a colon in an element ID in a CSS selector [duplicate]
... search_form:expression . I need to specify some styling on that element, but that colon looks like the beginning of a pseudo-element to the browser so it gets marked invalid and ignored. Is there anyway to escape the colon or something?
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Android Paint: .measureText() vs .getTextBounds()
I'm measuring text using Paint.getTextBounds() , since I'm interested in getting both the height and width of the text to be rendered. However, the actual text rendered is always a bit wider than the .width() of the Rect information filled by getTextBounds() .
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Copy Notepad++ text with formatting?
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answered Feb 24 '11 at 15:51
ppolyzosppolyzos
5,92666 gold badges2424 silver badges3737 bronze badges
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print memory address of Python variable [duplicate]
How do I print the memory address of a variable in Python 2.7?
I know id() returns the 'id' of a variable or object, but this doesn't return the expected 0x3357e182 style I was expecting to see for a memory address.
I want to do something like print &x , where x is a C++ int variable for exam...
Mysql ibdata 丢失或损坏如何通过frm&ibd 恢复数据 - 爬虫/数据库 - 清...
...现实的。万一还没有做好备份，数据被误删除了，或者ibdata损坏了怎么办呢？别担心，只要有部分的frm、ibd存在就可以恢复部分数据。注意：
一、这个是对innodb的数据恢复。myisam不需要这么麻烦，只要数据文件存在直接复制过...
Discuz轻松生成sitemaps.xml网站地图 - 更多技术 - 清泛网 - 专注C/C++及内核技术
..._updateperi='60';//协议文件更新周期的上限，单位为分钟
$web_root=$_G['siteurl'];//根网址
$CHARSET='utf-8';// or gbk //选择编码方式
/***********************************************************************************************/
//网站地图sitemap.xml
$sitemap="<?xml...
How can I fill out a Python string with spaces?
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Felix KlingFelix Kling
666k151151 gold badges968968 silver badges10321032 bronze badges
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What exactly does += do in python?
...sent. The __iadd__ method of a class can do anything it wants. The list object implements it and uses it to iterate over an iterable object appending each element to itself in the same way that the list's extend method does.
Here's a simple custom class that implements the __iadd__ special method...