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'
-with open('C:\Users\Administrator\Desktop','r',encoding='utf-8')as cj1:
+new_data=''
+with open(r'C:\Users\Administrator\Desktop\book2.txt','r',encoding='utf-8')as cj1:
     for data in cj1:
     for data in cj1:
-        if '123323' in cj1:
-            print('文件中有')
+        if '123' in data:
+            data=data.replace('123','456')
\ No newline at end of file
+        new_data+=data
+with open(r'C:\Users\Administrator\Desktop\book2.txt','w',encoding='utf-8')as cj1:
+    cj1.write(new_data)
+
+with open(r'C:\Users\Administrator\Desktop\book2.txt','r',encoding='utf-8')as cj1:
+    a=cj1.read()
+    print(a)
+