save project

diy.py

+sb=open(r'C:\Users\Administrator\Desktop\新建文本文档.txt','w',encoding='utf-8')
+sb.write('小A,12本\n')
+sb.write('小b,12本\n')
+sb.close()
+sb=open(r'C:\Users\Administrator\Desktop\新建文本文档.txt','r',encoding='utf-8')
+for data in sb:
+    if '小A,12本' in data:
+        print('数据在')
+sb.close()