auto save

sat.py

 new_b=''
 new_b=''
-with open(r'C:\Users\DELL\Desktop\test.txt','r',encoding='utf-8') as file1:
+with open(r'C:\Users\DELL\Desktop\tetw','r',encoding='utf-8') as file1:
     for b in file1:
     for b in file1:
-        if'小强：10本'in b:
+        if'小强:10本'in b:
             b=b.replace('小强：10本','小强：11本')
             b=b.replace('小强：10本','小强：11本')
         new_b +=b
         new_b +=b
-with open(r'C:\Users\DELL\Desktop\test.txt','r',encoding='utf-8') as file1:
+with open(r'C:\Users\DELL\Desktop\tetw','w',encoding='utf-8') as file1:
     file1.write(new_b)
     file1.write(new_b)
\ No newline at end of file