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_book=''
 a=open(r'/Users/edz/Desktop/book.txt','w',encoding='utf-8')
 a.write('小兰:12本\n')
 a.write('小丽:11本\n')
@@ -16,14 +16,24 @@ with open(r'/Users/edz/Desktop/book.txt','a',encoding='utf-8') as a3:
     a3.write('小强:12本\n')
     a3.write('李明:15本\n')
 
-a4=open(r'/Users/edz/Desktop/book.txt','r',encoding='utf-8')
-input_read=a4.read()
-print(input_read)
-a4.close()
+# a4=open(r'/Users/edz/Desktop/book.txt','r',encoding='utf-8')
+# input_read=a4.read()
+# print(input_read)
+# a4.close()
 
 with open(r'/Users/edz/Desktop/book.txt','r',encoding='utf-8') as a5:
     for book in a5:
         if '小强:12本' in book:
             print('122121')
+            book=book.replace('小强:12本','小强:11本')
+        elif '李明:15本' in book:
+            book=book.replace('李明:15本','李明:5本')
+            print("1212121212")
+        new_book=book+new_book
+    print(new_book)
 
+with open(r'/Users/edz/Desktop/book.txt','w',encoding='utf-8') as a6:
+    a6.write(new_book)
 
+with open(r'/Users/edz/Desktop/book.txt','r',encoding='utf-8') as a7:
+    a7.read()