d.</p></dd>


<dt>print_step</dt>
<dd><p>A non-negative integer. Defaults to 1. If print_step&gt;0, print variable names by each print_step-th iteration. If print_step=0 or no_cores&gt;1, no message is print.</p></dd>


<dt>method</dt>
<dd><p>Four methods are provided, "tree" and "chimerge" for optimal binning that support both numerical and categorical variables, and 'width' and 'freq' for equal binning that support numerical variables only. Defaults to "tree".</p></dd>


<dt>ignore_const_cols</dt>
<dd><p>