Merge pull request '在折现上显示数据' (#38) from saipo_test into master

Reviewed-on: saipo/astrbot_plugin_dajiao#38

main.py

@@ -333,10 +333,13 @@ class MyPlugin(Star):
             day.append(date[i][0])
             volume.append(date[i][1])
         plt.plot(day, volume)
-        plt.title('日产量')
-        plt.xlabel('日期')
-        plt.ylabel('日产量')
+        plt.title('dayvolume')
+        plt.xlabel('day')
+        plt.ylabel('volume')
         plt.xticks(day)
+        #设置显示数据
+        for x, y in zip(day, volume):
+            plt.text(x, y, f'{y}', ha='center', va='bottom', fontsize=10)
         plt.grid()
         plt.savefig('dayvolume.png')
         plt.close()