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How to find the installed pandas version
...trouble with some of pandas functionalities. How do I check what is my installation version?
6 Answers
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Length of generator output [duplicate]
... Fibonacci numbers. You can get as many Fibonacci numbers as you want by calling next().
If you really need to know the number of items there are, then you can't iterate through them linearly one time anyway, so just use a different data structure such as a regular list.
...
What does “mro()” do?
...very attribute you get on a class's instance, not just methods, is conceptually looked up along the __mro__, so, if more than one class among the ancestors defines that name, this tells you where the attribute will be found -- in the first class in the __mro__ that defines that name.
...
Best practices with STDIN in Ruby?
...ARGF is your friend when it comes to input; it is a virtual file that gets all input from named files or all from STDIN.
ARGF.each_with_index do |line, idx|
print ARGF.filename, ":", idx, ";", line
end
# print all the lines in every file passed via command line that contains login
ARGF.each do...
Use cases for the 'setdefault' dict method
...e case: Grouping items (in unsorted data, else use itertools.groupby)
# really verbose
new = {}
for (key, value) in data:
if key in new:
new[key].append( value )
else:
new[key] = [value]
# easy with setdefault
new = {}
for (key, value) in data:
group = new.setdefault(k...
How to find event listeners on a DOM node when debugging or from the JavaScript code?
...d A.com/js/jquery-ui-1.10.3.custom.js?_=1384831682813. Origin B.com is not allowed by Access-Control-Allow-Origin.
– hiway
Nov 19 '13 at 3:50
5
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廉价共享存储解决方案2-drbd+cman+gfs2 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...aliyun.com/repo/Centos-6.repo
把$releasever 全部改为6
yum clean all&yum makecache
3、安装DRBD 请参考
http://user.qzone.qq.com/58740020/blog/1448855653
3.1、不一样的地方
同步以上操作或文件,并初始化资源及启动服务
drbdadm create-md r0
service d...
Specify JDK for Maven to use
....xml but I don't have a settings.xml . Plus, I don't want to use 1.6 for all maven builds.
14 Answers
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Separation of business logic and data access in django
...de is confusing and, after a certain time, I cease to understand what is really happening.
10 Answers
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Is there a range class in C++11 for use with range based for loops?
...:irange, which is a bit more focused in scope.
C++20's range library will allow you to do this via view::iota(start, end).
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