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How do I create test and train samples from one dataframe with pandas?

I have a fairly large dataset in the form of a dataframe and I was wondering how I would be able to split the dataframe into two random samples (80% and 20%) for training and testing. ...
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How to convert 1 to true or 0 to false upon model fetch

I have a model that is set with a JSON response from a mysql database. The model data is set with true or false into a boolean/tinyint field in the database, which uses 1 or 0 . ...
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Can I add jars to maven 2 build classpath without installing them?

Maven2 is driving me crazy during the experimentation / quick and dirty mock-up phase of development. 24 Answers ...
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How do I make a UITableViewCell appear disabled?

I know about UITableview: How to Disable Selection for Some Rows but Not Others and cell.selectionStyle = UITableViewCellSelectionStyleNone , but how do I make a cell (or any UIView for that matter) appear disabled (grayed-out) like below? ...
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Change Bootstrap input focus blue glow

Does anyone know the how to change Bootstrap's input:focus ? The blue glow that shows up when you click on an input field? ...
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Add centered text to the middle of a -like line

I'm wondering what options one has in xhtml 1.0 strict to create a line on both sides of text like-so: 32 Answers ...
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What's the difference between Cache-Control: max-age=0 and no-cache?

The header Cache-Control: max-age=0 implies that the content is considered stale (and must be re-fetched) immediately, which is in effect the same thing as Cache-Control: no-cache . ...
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Truncating floats in Python

I want to remove digits from a float to have a fixed number of digits after the dot, like: 29 Answers ...
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Why a function checking if a string is empty always returns true? [closed]

I have a function isNotEmpty which returns true if the string is not empty and false if the string is empty. I've found out that it is not working if I pass an empty string through it. ...
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++someVariable vs. someVariable++ in JavaScript

In JavaScript you can use ++ operator before ( pre-increment ) or after the variable name ( post-increment ). What, if any, are the differences between these ways of incrementing a variable? ...