save project

diy.py

+new_data=''
+with open(r'C:\Users\Administrator\Desktop\txst.txt','r',encoding='utf-8')as a:
+    for data in a:
+        if '小强：10本' in data:
+            data=data.replace('小强：10本','小强：11本')
+            print('小强的数据在文件夹里')
+        if '小兰：12本' in data:
+            print('小兰的数据在文件夹里')
+        new_data +=data
+
+with open(r'C:\Users\Administrator\Desktop\txst.txt','w',encoding='utf-8')as a:
+    a.write(new_data)
+
+with open(r'C:\Users\Administrator\Desktop\txst.txt','r',encoding='utf-8')as a:
+    b=a.read()
+    print(b)
\ No newline at end of file