save project

diy.py

+
+new_data=''
+with open(r'C:\Users\Administrator\Desktop\st.txt','r',encoding='utf-8') as file1:
+    with open(r'C:\Users\Administrator\Desktop\st.txt','a',encoding='utf-8') as file:
+        file.write('小强:10本\n')
+        file.write('李文:15本\n')
+    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\Administrator\Desktop\st.txt','w',encoding='utf-8') as file1:
+    file1.write(new_data)
+
+with open(r'C:\Users\Administrator\Desktop\st.txt','r',encoding='utf-8') as file1:
+    a=file1.read()
+    print(a)