save project

diy.py

 # 写入同学们的捐赠明细：'小兰：12本'、'小丽：11本'、'李文：9本'、'张伟：16本'
+with open(r'C:\Users\win 10\Desktop\po.txt','w',encoding='utf-8') as po:
+    #po.write('小兰:12\n')
+    po.write('小强:10\n')
+    po.write('李明：15\n')
+with open(r'C:\Users\win 10\Desktop\po.txt','a',encoding='utf-8') as po:
+    po.write('小兰:12\n')