save project

diy.py

+new_data=''
 with open(r'C:\Users\ASUS\Desktop\book.txt','r',encoding='utf-8')as filel:
     for data in filrl:
         if '小强：10本'in data:
-            print('小强数据在文件中')
+            data=data.replace('小强：10本','小强：11本)
         if '小兰： 12本'in data:
-            print('小兰数据在文件中')
\ No newline at end of file
+            data=data.replace('小兰：12本','小兰：14本)
+        new_data +=data
+
+with open(r'C:\Users\ASUS\Desktop\book.txt','w',encoding='utf-8')as filel:
+    filel.write(new_data)
+
+with open(r'C:\Users\ASUS\Desktop\book.txt','r',encoding='utf-8')as filel:
+    a=filel.read()
+    print(a)
\ No newline at end of file