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'
 # 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'
+a=''
+with open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8')as file:
+    file.write('小丽:12\n')
+    file.write('小张:8\n')
+    file.write('小红:16\n')
+    file.write('小红:6\n')
 with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8')as file:
 with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8')as file:
+    for data in file:
+        if '小张:8' in data :
+            data=data.replace('8','10')
+        a+=data
+with open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8')as file:
+    file.write(a)        
+       
+    
+    
     
     
                 
                 
-    # file.write('小丽：11\n')
-    # file.write('李文：9\n')
-    # file.write('张伟：16\n')
-    for d in file :
-        if '小丽：11' in d:
-            print('ok')