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How to take column-slices of dataframe in pandas

I load some machine learning data from a CSV file. The first 2 columns are observations and the remaining columns are features. ...
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How to get different colored lines for different plots in a single figure?

... 432 Matplotlib does this by default. E.g.: import matplotlib.pyplot as plt import numpy as np x =...
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Heroku error: “Permission denied (public key)”

... 217 Try heroku keys:add <path-to-your-public-key>. For example, heroku keys:add ~/.ssh/id_...
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month name to month number and vice versa in python

...calendar {v: k for k,v in enumerate(calendar.month_abbr)} Before Python (2.7+) you would do dict((v,k) for k,v in enumerate(calendar.month_abbr)) share | improve this answer | ...
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Django: ImproperlyConfigured: The SECRET_KEY setting must not be empty

... 25 Answers 25 Active ...
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Red black tree over avl tree

... 126 What's the main reason for choosing Red black trees instead of AVL trees? Both red-black t...
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How can we print line numbers to the log in java

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How to format Joda-Time DateTime to only mm/dd/yyyy?

I have a string " 11/15/2013 08:00:00 ", I want to format it to " 11/15/2013 ", what is the correct DateTimeFormatter pattern? ...
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Python - When to use file vs open

...en file and open in Python? When should I use which one? (Say I'm in 2.5) 6 Answers ...
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How to merge a transparent png image with another image using PIL

... 291 import Image background = Image.open("test1.png") foreground = Image.open("test2.png") backg...