title: Python library for data scaling, centering and Box-Cox transformation
body: <p>Is there any package in Python that does data transformation: scaling, centering and Box-Cox transformation to eliminate skewness of data?
  In R this could be done using <code>caret</code> package:</p>
  
  <pre><code>set.seed(1)
  predictors = data.frame(x1 = rnorm(1000,
                                     mean = 5,
                                     sd = 2),
                          x2 = rexp(1000,
                                    rate=10))
  
  require(caret)
  
  trans = preProcess(predictors, 
                     c("BoxCox", "center", "scale"))
  predictorsTrans = data.frame(
        trans = predict(trans, predictors))
  </code></pre>
  
  <p>I know about <code>sklearn</code>, but I was unable to find the above-mentioned processing functions.</p>