save project

diy.py

 new_data=''
-with open(r'C:\Users\Lenovo\Desktop.txt','a',encoding='utf-8') as file1:
+with open(r'C:\Users\Lenovo\Desktop.txt','r',encoding='utf-8') as file1:
     for data in file1:
         if'小强：10本' in data:
             data=data.replace('小强：10本','小强：11本')
         if'小兰：12本' in data:
             data=data.replace('小兰：12本','小兰：14本')
-        new_deta +=data
-with open(r'C:\Users\Lenovo\Desktop.txt','a',encoding='utf-8') as file1:
+        new_data +=data
+with open(r'C:\Users\Lenovo\Desktop.txt','w',encoding='utf-8') as file1:
     file1.write(new_data)
-with open(r'C:\Users\Lenovo\Desktop.txt','a',encoding='utf-8') as file1:
+with open(r'C:\Users\Lenovo\Desktop.txt','r',encoding='utf-8') as file1:
     a=file1.read()
     print(a)
\ No newline at end of file