save project

diy.py

+file1=with open(r'C:\Users\Administrator\Desktop\book.txt','w',encoding='utf-8')as:
+file1.write('小兰:12本'/n)
+file1.close()
+new_data=''
+with open(r'"C:\Users\Administrator\Desktop\book.txt"'r',encoding='utf-8')
+    for data in file1:
+        if'小强:10本'in data:
+        print('数据在文件中')
+        data=data.replace('小强：10本','小强：11本')