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'open(r'C:\Users\Administrator\Desktop\abc.txt','w',encoding='utf-8')
 j=''
 with open(r'C:\Users\Administrator\Desktop\abc.txt','r',encoding='utf-8') as a:
-    a.replace('小兰:12本','小兰：14本')
-
-    
+    for data in  a:
+        if '小a:-10本' in data:
+            data=data.replace('小兰：12本','小兰：14本')
+        j+=data
+with open(r'C:\Users\Administrator\Desktop\abc.txt','w',encoding='utf-8') as a:
+    a.write(j)
+with open(r'C:\Users\Administrator\Desktop\abc.txt','r',encoding='utf-8') as a:
+    b=a.read()
+    print(b)