diff --git a/QX8800SP_DA.py b/QX8800SP_DA.py
index 9ba50d8..2aca7ad 100644
--- a/QX8800SP_DA.py
+++ b/QX8800SP_DA.py
@@ -7,6 +7,7 @@ from matplotlib.patches import Ellipse
 import matplotlib.transforms as transforms
 # import seaborn as sns
 import os
+import math
 # plt.style.use('seaborn')
 plt.rcParams['font.family'] = ['SimHei']  # 用来正常显示中文标签
 plt.rcParams['axes.unicode_minus'] = False  # 用来正常显示负号