$(document).ready(function() {
 /* Add a [>>>] button on the top-right corner of code samples to hide
 * the >>> and ... prompts and the output and thus make the code
 * copyable. */
 var div = $('.highlight-python .highlight,' +
 '.highlight-python3 .highlight')
 var pre = div.find('pre');

 // get the styles from the current theme
 pre.parent().parent().css('position', 'relative');
 var hide_text = 'Hide the prompts and output';
 var show_text = 'Show the prompts and output';
 var border_width = pre.css('border-top-width');
 var border_style = pre.css('border-top-style');
 var border_color = pre.css('border-top-color');
 var button_styles = {
 'cursor':'pointer', 'position': 'absolute', 'top': '0', 'right': '0',
 'border-color': border_color, 'border-style': border_style,
 'border-width': border_width, 'color': border_color, 'text-size': '75%',
 'font-family': 'monospace', 'padding-left': '0.2em', 'padding-right': '0.2em',
 'border-radius': '0 3px 0 0'
 }

 // create and add the button to all the code blocks that contain >>>
 div.each(function(index) {
 var jthis = $(this);
 if (jthis.find('.gp').length > 0) {
 var button = $('<span class="copybutton">&gt;&gt;&gt;</span>');
 button.css(button_styles)
 button.attr('title', hide_text);
 button.data('hidden', 'false');
 jthis.prepend(button);
 }
 // tracebacks (.gt) contain bare text elements that need to be
 // wrapped in a span to work with .nextUntil() (see later)
 jthis.find('pre:has(.gt)').contents().filter(function() {
 return ((this.nodeType == 3) && (this.data.trim().length > 0));
 }).wrap('<span>');
 });

 // define the behavior of the button when it's clicked
 $('.copybutton').click(function(e){
 e.preventDefault();
 var button = $(this);
 if (button.data('hidden') === 'false') {
 // hide the code output
 button.parent().find('.go, .gp, .gt').hide();
 button.next('pre').find('.gt').nextUntil('.gp, .go').css('visibility', 'hidden');
 button.css('text-decoration', 'line-through');
 button.attr('title', show_text);
 button.data('hidden', 'true');
 } else {
 // show the code output
 button.parent().find('.go, .gp, .gt').show();
 button.next('pre').find('.gt').nextUntil('.gp, .go').css('visibility', 'visible');
 button.css('text-decoration', 'none');
 button.attr('title', hide_text);
 button.data('hidden', 'false');
 }
 });
});