save project

diy.py

 data=''
 with open(r'C:\Users\admin\Desktop\text.txt','r',encoding='utf-8') as op:
-    a=op.read()
-    for i in a:
-        if '小强：12本' in a:
-            op.replace('小强：12本','小强：11本')
-            data=op+data
-        print(data)
\ No newline at end of file
+    for i in op:
+        if '小强：12本' in i:
+            op=op.replace('小强：12本','小强：11本')
+        data+=op
+        print(data)
+with open(r'C:\Users\admin\Desktop\text.txt','w',encoding='utf-8')as op1.write(data):
+    op1.write(data)
\ No newline at end of file