auto save

d1.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'
+
+data1=''
+with open(r'C:\Users\玛酷01\Desktop\ceshi.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        if '小兰：12本' in data:
+            data=data.replace('小兰：12本','小兰：15本')
+        data1+=data
+    print(data1)
+with open(r'C:\Users\玛酷01\Desktop\ceshi.txt','w',encoding='utf-8') as file1:
+    file1.write(data1)
+            
\ No newline at end of file

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'
+newdata=''
+with open(r'C:\Users\玛酷01\Desktop\test.txt','r', encoding='utf-8')as file1:
+    for data in file1:
+        if '小兰：12本'in data:
+
+            data=data.replace('小兰：12本','小兰：13本')
+  
+with open(r'C:\Users\玛酷01\Desktop\test.txt','w', encoding='utf-8')as file1:
+     file1.writ(newdata)
\ No newline at end of file