save project

iii.py

+sb=""
 with open(r"C:\Users\WeiBo\Desktop\teft2.txt","r",encoding="utf-8") as filel :
 with open(r"C:\Users\WeiBo\Desktop\teft2.txt","r",encoding="utf-8") as filel :
     for data in filel:
     for data in filel:
         if"小强:10本"in data:
         if"小强:10本"in data:
-            print("数据在文件中")
+            data=data.replace("小强:10本","小强:20本")
\ No newline at end of file
+        sb+=data
+with open(r"C:\Users\WeiBo\Desktop\teft2.txt","w",encoding="utf-8") as filel :
+    filel.write(sb)
\ No newline at end of file