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Maximum length of the textual representation of an IPv6 address?
...
631
45 characters.
You might expect an address to be
0000:0000:0000:0000:0000:0000:0000:0000
...
How to keep index when using pandas merge
...merge_on col2
index
a 1 1 1
b 2 3 2
c 3 4 NaN
Note that for some left merge operations, you may end up with more rows than in a when there are multiple matches between a and b. In this case, you may need to drop duplicates.
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Moving average or running mean
...e loop, without dependencies, the code below works great.
mylist = [1, 2, 3, 4, 5, 6, 7]
N = 3
cumsum, moving_aves = [0], []
for i, x in enumerate(mylist, 1):
cumsum.append(cumsum[i-1] + x)
if i>=N:
moving_ave = (cumsum[i] - cumsum[i-N])/N
#can do stuff with moving_ave h...
How to delete every other line in Vim?
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ruirui
9,73377 gold badges4242 silver badges6161 bronze badges
...
class method generates “TypeError: … got multiple values for keyword argument …”
...ng")
print
print myfoo
You'll output like:
<__main__.foo object at 0x321c290>
a thong is something
<__main__.foo object at 0x321c290>
You can see that 'thing' has been assigned a reference to the instance 'myfoo' of the class 'foo'. This section of the docs explains how function ar...
Copy a table from one database to another in Postgres
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326
Extract the table and pipe it directly to the target database:
pg_dump -t table_to_copy sourc...
Implode an array with JavaScript?
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John
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answered Nov 10 '10 at 17:03
jon_darkstarjon_darkstar
14.8...
How to use `subprocess` command with pipes
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3
@MakisH You're looking at string.find, which has been deprecated in favor of str.find (i.e., the method find on str objects).
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redmine开源项目管理工具介绍 - 开源 & Github - 清泛网 - 专注IT技能提升
...edmine将当天的日期作为显示项目活动的基准时间，显示前30天到今天的活动。
3.线路图
提供一个更级别的基于项目版本的对于整个问题跟踪系统的概述，它可以帮助制定项目计划，管理项目开发。
4.新建问题
要创建新建的问...
Complex numbers usage in python [closed]
...u can use the type as a constructor if you prefer:
>>> complex(2,3)
(2+3j)
A complex number has some built-in accessors:
>>> z = 2+3j
>>> z.real
2.0
>>> z.imag
3.0
>>> z.conjugate()
(2-3j)
Several built-in functions support complex numbers:
>>...