auto save

func.py

+# file1=open("C:\\Users\\Administrator\\Desktop\\test.txt",'w',encoding='utf-8')
+# file1.write('小蓝,12本\n')
+# file1.close()file1=open("C:\\Users\\Administrator\\Desktop\\test.txt",'a',encoding='utf-8')
+# file1.write('小强,10本\n')
+# file1.write('小明,15本\n')
+# file1.close()
+new_data=""
+with open("C:\\Users\\Administrator\\Desktop\\test.txt",'r',encoding='utf-8')as file1:
+    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("C:\\Users\\Administrator\\Desktop\\test.txt",'w',encoding='utf-8')as file1:
+    file1.write(new_data)