save project

diy.py

+new_data=''
+with open(r'C:\Users\admin\Desktop\book.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        if '小强：10本' in data:
+            data=data.replace("小强：10本","小强：11本")
+        if '小兰：12本' in data:
+            data=data.replace("小兰：12本","小兰：14本")
+        new_data+=data
+with open(r'C:\Users\admin\Desktop\book.txt','w',encoding='utf-8') as file1:
+    file1.write(new_data)
+with open(r'C:\Users\admin\Desktop\book.txt','r',encoding='utf-8') as file1:
+    a=file1.read()
+    print(a)        
\ No newline at end of file