save project

diy.py

@@ -4,7 +4,20 @@ filel.write('小美：12本\n')
 filel.write('小丽：11本\n')
 filel.write('李文：9本\n')
 filel.close()
-with open(r'C:\\Users\\Public\\Desktop\\test.txt','r',encoding='utf-8')as file1:
+new_data:''
+with open(r'C:\\Users\\Public\\Desktop\\test.txt','w'encoding='utf-8') as file1:
     for data in filel:
-     if'小丽：11本'in data:
-         print('数据在文件中')
\ No newline at end of file
+        if'小丽：11本'  in data:
+            data=data.replace('小丽：11本','小丽：12本')
+        new_data+=data
+with open(r'C:\\Users\\Public\\Desktop\\test.txt','w'encoding='utf-8') as file1:
+    filel.write(new_data)
+
+with open(r'C:\\Users\\Public\\Desktop\\test.txt','r'encoding='utf-8') as file1:
+
+
+
+
+
+
+