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'
-new_data=""
-with open(r'C.\Users\CM\Desktop\book.txt','r',encoding='utf-8') as filel:
-    for data in filel:
-        if'小强:10本'in data:
-            data=data.replace('小强:10本','小强:11本')
-        if '小兰:12本'in data:
-            data=data.replace('小兰:12本','小兰:14本')
-        new_data +=data
-with open(r'C.\Users\CM\Desktop\book.txt','w',encoding='utf-8') as filel:
-    filel.write(new_data)
-with open(r'C.\Users\CM\Desktop\book.txt','r',encoding='utf-8') as filel:
-    a=filel.read()
-    print(a)
\ No newline at end of file
+filel=open(r'C.\Users\CM\Desktop\book.txt','w',encoding='utf-8')
+filel.write('666:12\n')
+filel.close()
+
+with open(r'C.\Users\CM\Desktop\book.txt','a',encoding='utf-8')as file:
+    for '小强：10本'in data:
+        if file.write('小强：10本\n')
+           print('小强数据在文件中')
+    
\ No newline at end of file