save project

diy.py

@@ -5,12 +5,18 @@
 # a.write('李文:9本')
 # a.write('张伟: 16本')
 # a.close()
-with open(r'C:\Users\Windows 7\Desktop\1.txt',"r",encoding='utf-8') as a:
+new_data=''
+with open(r'C:\Users\Windows 7\Desktop\1.txt','r',encoding='utf-8') as a:
     # a.write('小丽: 11本\n')
     # a.write('张伟: 16本\n')
     # b=a.read()
     # print(b)
     for data in a:
-        if '小丽:11本' in data:
+       
+        if '小丽: 11本' in data:
             print('数据在文件中')
+            data=data.replace('小丽: 11本','小丽:20本')
+        new_data +=data
+with open(r'C:\Users\Windows 7\Desktop\1.txt',"w",encoding='utf-8') as a:
+    a.write(new_data)
         
\ No newline at end of file