The highchart data is converted to an SVG path, so you'd have to interpret the path yourself. I'm not sure why you would want to do this, actually: in general you can trust 3rd party libraries to work as advertised; the testing of that code should reside in that library.
# Get the origin and datapoints of the first line s = selenium.get_eval("window.jQuery('svg g.highcharts-tracker path:eq(0)')") splitted = re.split('\s+L\s+', s) origin = splitted.split(' ')[1:] data = [p.split(' ') for p in splitted[1:]] # Convert to floats origin = [float(origin), float(origin)] data = [[float(x), float(y)] for x, y in data] # Get the min and max y-axis value and position min_y_val = float(selenium.get_eval( \ "window.jQuery('svg g.highcharts-axis:eq(1) text:first').text()") max_y_val = float(selenium.get_eval( \ "window.jQuery('svg g.highcharts-axis:eq(1) text:last').text()") min_y_pos = float(selenium.get_eval( \ "window.jQuery('svg g.highcharts-axis:eq(1) text:first').attr('y')") max_y_pos = float(selenium.get_eval( \ "window.jQuery('svg g.highcharts-axis:eq(1) text:last').attr('y')") # Calculate the value based on the retrieved positions y_scale = min_y_pos - max_y_pos y_range = max_y_val - min_y_val y_percentage = data * 100.0 / y_scale value = max_y_val - (y_range * percentage)
Disclaimer: I didn't have to time to fully verify it, but something along these lines should give you what you want.
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