Creates bar char

        :param x_labels: Names for each variable
        :param y_values: Values of x labels
        :param y_label: Label of y axis
        :return: Bar chart

def create_bar_chart(self, x_labels, y_values, y_label):
        """Creates bar char

        :param x_labels: Names for each variable
        :param y_values: Values of x labels
        :param y_label: Label of y axis
        :return: Bar chart
        """
        self.setup(0.25)
        ax1 = self.get_ax()
        ax1.set_xticks(list(range(len(x_labels))))
        ax1.set_xticklabels([x_labels[i] for i in range(len(x_labels))],
                            rotation=90)
        plt.ylabel(y_label)

        x_pos = range(len(x_labels))
        plt.bar(x_pos, y_values, align="center")

        return ax1