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\Administrator\Desktop\222.txt','w',encoding='utf-8') as 222:
-    222.write('小兰：12本')
+#with open(r'C:\Users\Administrator\Desktop\yy.txt','a',encoding='utf-8') as yy:
+    #yy.write('小兰：12本\n')
+    #yy.write('小丽：11本\n')
+    #yy.write('李文：9本\n')
+w=''
+with open(r'C:\Users\Administrator\Desktop\yy.txt','r',encoding='utf-8') as yy:
+    for date in yy:
+        if '小丽：11本' in date:
+            date=date.replace('小丽：11本','小丽：10本')
+        w+=date
+with open(r'C:\Users\Administrator\Desktop\yy.txt','w',encoding='utf-8') as yy: 
+    yy.write(w)       
\ No newline at end of file