save project

1.py

+new_data=''
+with open(r'C:\Users\Lenovo\Desktop\book.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        if '李:10本'in data:
+            data=data.replace('李:10本','李:11本')
+        if '刘:17本'in data:
+             data=data.replace('刘:17本','刘:18本')
+        new_data+=data
+
+with open(r'C:\Users\Lenovo\Desktop\book.txt','w',encoding='utf-8') as file1:
+    file1.write(new_data)
+
+with open(r'C:\Users\Lenovo\Desktop\book.txt','r',encoding='utf-8') as file1:
+    a=file1.read()
+    print(a)
\ No newline at end of file