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Label encoding across multiple columns in scikit-learn

I'm trying to use scikit-learn's LabelEncoder to encode a pandas DataFrame of string labels. As the dataframe has many (50+) columns, I want to avoid creating a LabelEncoder object for each column; I'd rather just have one big LabelEncoder objects that works across all my columns of data. ...
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What is the difference between `after_create` and `after_save` and when to use which?

Are after_create and after_save the same as per functionality? 3 Answers 3 ...
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Rebase feature branch onto another feature branch

... the branch is not fully merged. I assume I can safely ignore this message and force the delete? – Arjen Feb 15 '13 at 11:28 13 ...
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Update built-in vim on Mac OS X

...his line to your .bashrc or .profile: alias vim='/path/to/your/own/vim' and/or change your $PATH so that it looks into its location before the default location. The best thing to do, in my opinion, is to simply download the latest MacVim which comes with a very complete vim executable and use it...
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Make the current Git branch a master branch

...pository in Git. I made a branch, then did some changes both to the master and to the branch. 14 Answers ...
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How do I compare version numbers in Python?

...lity but is used by setuptools (so you probably already have it installed) and is conformant to the current PEP 440; it will return a packaging.version.Version if the version is compliant and a packaging.version.LegacyVersion if not. The latter will always sort before valid versions. Note: packagin...
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How do I ignore files in a directory in Git?

... a match with a directory. In other words, foo/ will match a directory foo and paths underneath it, but will not match a regular file or a symbolic link foo (this is consistent with the way how pathspec works in general in git). If the pattern does not contain a slash /, git treats it as a shell glo...
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Split value from one field to two

I've got a table field membername which contains both the last name and the first name of users. Is it possible to split those into 2 fields memberfirst , memberlast ? ...
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How to get the name of a function in Go?

...single function uniquely. The only guarantee is that the result is zero if and only if v is a nil func Value." – jochen Apr 14 '15 at 15:56 1 ...
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Is there a regular expression to detect a valid regular expression?

...group start (?: (?:[^?+*{}()[\]\\|]+ # literals and ^, $ | \\. # escaped characters | \[ (?: \^?\\. | \^[^\\] | [^\\^] ) # character classes (?: [^\]\\]+ | \\. )* \] | \( (?:\?[:=!]|\?<[=!]|\?>)? (?1)?? ...