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Add SUM of values of two LISTS into new LIST
...
The zip function is useful here, used with a list comprehension.
[x + y for x, y in zip(first, second)]
If you have a list of lists (instead of just two lists):
lists_of_lists = [[1, 2, 3], [4, 5, 6]]
[sum(x) for x in zip(*li...
How to extract the n-th elements from a list of tuples?
...
This also works:
zip(*elements)[1]
(I am mainly posting this, to prove to myself that I have groked zip...)
See it in action:
>>> help(zip)
Help on built-in function zip in module builtin:
zip(...)
zip(seq1 [, seq2...
Iterating over every two elements in a list
...se() (or grouped()) implementation.
For Python 2:
from itertools import izip
def pairwise(iterable):
"s -> (s0, s1), (s2, s3), (s4, s5), ..."
a = iter(iterable)
return izip(a, a)
for x, y in pairwise(l):
print "%d + %d = %d" % (x, y, x + y)
Or, more generally:
from itertools...
VC MFC工具栏(CToolBar)控件 - C/C++ - 清泛网 - 专注C/C++及内核技术
...用CreateEx函数后，调用这个语句： m_Toolbar.EnableToolTips();//激活信息提示功能
然后在对话类里添加一个成员函数（用于TTN_NEEDTEXT消息处理函数），格式如下：
BOOL OnDisplay(UINT id, NMHDR *pNMHDR, LRESULT *pResult)
然后添加TTN_NEEDTEXT消息映...
how to return index of a sorted list? [duplicate]
...d do:
L = [2,3,1,4,5]
from operator import itemgetter
indices, L_sorted = zip(*sorted(enumerate(L), key=itemgetter(1)))
list(L_sorted)
>>> [1, 2, 3, 4, 5]
list(indices)
>>> [2, 0, 1, 3, 4]
Or, for Python <2.4 (no itemgetter or sorted):
temp = [(v,i) for i,v in enumerate(L)]
...
How to import CSV file data into a PostgreSQL table?
...t article.
Solution paraphrased here:
Create your table:
CREATE TABLE zip_codes
(ZIP char(5), LATITUDE double precision, LONGITUDE double precision,
CITY varchar, STATE char(2), COUNTY varchar, ZIP_CLASS varchar);
Copy data from your CSV file to the table:
COPY zip_codes FROM '/path/to/csv...
Where to find Java JDK Source Code? [closed]
... So I want the JDK Source Code.
Before I re-installed Linux I had the src.zip package with all the official source code in it. I just had to tell Eclipse where this file is and I could see the code. But now I don't have the file anymore...
...
Download the Android SDK components for offline install
...itory/repository-7.xml
Search for <sdk:url>**android-2.3.1_r02-linux.zip**</sdk:url> under the api version which you want to download. This is the file name which you have to download. to download this file you have to type following URI in any downloader or browser and it will start do...
pip install from git repo branch
...tBucket, is:
pip install https://github.com/user/repository/archive/branch.zip
which becomes for Django master:
pip install https://github.com/django/django/archive/master.zip
for Django stable/1.7.x:
pip install https://github.com/django/django/archive/stable/1.7.x.zip
With BitBucket it's about ...
How to copy a directory structure but only include certain files (using windows batch files)
...if you can use ROBOCOPY, try this:
ROBOCOPY C:\Source C:\Destination data.zip info.txt /E
EDIT: Changed the /S parameter to /E to include empty folders.
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