save project

diy3.py

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