save project

my_window.py

-with open(r'C:\Users\JT\Desktop\book.txt','r',encoding='utf-8')as
-file1:
-for data in file1:
+with open(r'C:\Users\JT\Desktop\book.txt','r',encoding='utf-8')as file1:
+    for data in file1:
     if'小强：30本'in data:
     if'小强：30本'in data:
-        print("zai")
+        data=data.replace('小强：30本','小强：3本')
+        new_data+=data
+with open(r'C:\Users\JT\Desktop\book.txt','w',encoding='utf-8')as file1:
+    file1.write(new_data)
+with open(r'C:\Users\JT\Desktop\book.txt','r',encoding='utf-8')as file1:
+    a=file1.read()
+    print(a)
\ No newline at end of file