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'
-#file=open(r"C:\Users\Administrator\Desktop\test.txt",'a',encoding='utf-8')
-#file.write('小兰：12本')
-#file.write('小强：15本\n')
-#file.write('李明：15本\n')
-#file.close()
+# file=open(r"C:\Users\Administrator\Desktop\test.txt",'w',encoding='utf-8')
+# file.write('小兰：12本')
+# file.close()
+new=''
+with open(r"C:\Users\Administrator\Desktop\test.txt",'r',encoding='utf-8') as file:
+    for i in file:
+        if '小强:10本' in i:
+            i=i.replace('小强:10本','小强:11本')
+        new=new+i
 with open(r"C:\Users\Administrator\Desktop\test.txt",'w',encoding='utf-8') as file:
-    file.write('小丽：11本\n')
-    file.write('李文：9本\n')
-    file.write('张伟：16本\n')
+    file.write(new)
+            
\ No newline at end of file