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Adding new column to existing DataFrame in Python pandas
... a b c d
6 -0.269221 -0.026476 0.997517 1.294385
8 0.917438 0.847941 0.034235 -0.448948
>>> df1['e'] = pd.Series(np.random.randn(sLength), index=df1.index)
>>> df1
a b c d e
6 -0.269221 -0.026476 0.997517 ...
win7 安装项目管理工具redmine2.5.1 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...ller-community-5.6.17.0.msi
ImageMagick-6.8.9-2-Q16-x86-dll.exe
mysql2-0.3.16.gem
mysql-connector-c-6.1.3-win32.zip
rmagick-2.13.1-x86-mingw32.gem
windows下建议全部下载32位版本的软件，windows下的依赖解决太痛苦了。同时建议用google搜，有的软件包发放在git...
How do I represent a hextile/hex grid in memory?
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answered Jun 1 '13 at 15:59
a paid nerda paid nerd
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Is generator.next() visible in Python 3?
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3 Answers
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How to remove multiple indexes from a list at the same time? [duplicate]
...nce.
If you have an arbitrary collection of indexes, then:
indexes = [2, 3, 5]
for index in sorted(indexes, reverse=True):
del my_list[index]
Note that you need to delete them in reverse order so that you don't throw off the subsequent indexes.
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The 'json' native gem requires installed build tools
I have ruby 1.9.2p180 (2011-02-18) [i386-mingw32] installed on my windows 7 machine. Now I tried to install the JSON gem using the command, "gem install json" and got the following error.
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Python list subtraction operation
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346
Use a list comprehension:
[item for item in x if item not in y]
If you want to use the - in...
How do I use raw_input in Python 3
I am using Python 3.1 and can't get the raw_input to "freeze" the dos pop-up. The book I'm reading is for Python 2.5 and I'm using Python 3.1
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Exif manipulation library for python [closed]
... huon
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answered Apr 19 '09 at 13:21
Paolo BergantinoPaolo Bergantino
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Standardize data columns in R
I have a dataset called spam which contains 58 columns and approximately 3500 rows of data related to spam messages.
15 ...