save project

11.py

+new_data=""
+with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as file:
+    for data in file: 
+        if '小强：10本' in data:
+            data=data.replace('小强：10本','小强：15本')
+        if '小明：15本' in data:
+            data=data.replace('小明：15本','小明：20本')
+        new_data +=data
+
+with open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8') as file:
+    file.write(new_data)
+
+with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as file:   
+    a=file.read()
+    print(a)
\ No newline at end of file