code: def create_bar_chart(self, x_labels, y_values, y_label):
          
          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
docs: 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