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Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
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I'd just use zip:
In [1]: from pandas import *
In [2]: def calculate(x):
...: return x*2, x*3
...:
In [3]: df = DataFrame({'a': [1,2,3], 'b': [2,3,4]})
In [4]: df
Out[4]:
a b
0 1 2
1 2 3
2 3 4
In [5]: df["A1"], ...
Is there an easy way to attach source in Eclipse?
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Up until yesterday I was stuck painstakingly downloading source zips for tons of jars and attaching them manually for every project. Then a colleague turned me on to The Java Source Attacher. It does what eclipse should do - a right click context menu that says "Attach Java Source".
I...
Is there a quick way to delete a file from a Jar / war without having to extract the jar and recreat
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zip -d file.jar unwanted_file.txt
jar is just a zip file after all. Definitely much faster than uncompressing/recompressing.
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How to perform better document version control on Excel files and SQL schema files
...sions.
The same is true for .xlsx if you decompress them. .xlsx files are zipped up directories of XML files (See How to properly assemble a valid xlsx file from its internal sub-components?). Git will view them as binary unless decompressed. It is possible to unzip the .xlsx and track the changes ...
Sorting an array of objects by property values
...by any field at will...
const homes=[{h_id:"3",city:"Dallas",state:"TX",zip:"75201",price:"162500"},{h_id:"4",city:"Bevery Hills",state:"CA",zip:"90210",price:"319250"},{h_id:"5",city:"New York",state:"NY",zip:"00010",price:"962500"}];
// Sort by price high to low
console.log(homes.sort(sort_...
Create nice column output in python
...... ]
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>>> widths = [max(map(len, col)) for col in zip(*rows)]
>>> for row in rows:
... print " ".join((val.ljust(width) for val, width in zip(row, widths)))
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a b c d
aaaaaaaaaa b c d
a bbbbbbbbbb c d
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Using .NET, how can you find the mime type of a file based on the file signature not the extension
...nk that it is reliable. E.g. '*.docx' file is determined as 'application/x-zip-compressed'.
– Monsignor
Feb 11 '11 at 4:20
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CSV API for Java [closed]
...blic class UserBean {
String username, password, street, town;
int zip;
public String getPassword() { return password; }
public String getStreet() { return street; }
public String getTown() { return town; }
public String getUsername() { return username; }
public int getZ...
iPhone App 开发第一步：从零到真机调试HelloWorld - 更多技术 - 清泛网 - ...
... 8.0以及汉化包：http://3.xp510.com:801/xp2011/VMware_Workstation_wmb.zip
Mac OSX 系统Snow Leopard 10.6： [苹果雪豹操作系统正式版].snowleopard_10a432_userdvd.dmg，下载地址已经丢失，估计verycd或其它网上有很多，下载下载是10.6的系统
darwin_sno...
How to upload a file to directory in S3 bucket using boto
...on.get_bucket('your bucket name')
key = boto.s3.key.Key(bucket, 'some_file.zip')
with open('some_file.zip') as f:
key.send_file(f)
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