auto save

diy.py

@@ -5,7 +5,16 @@
 # file1.write('李文:9本\n')
 # file1.write('张伟:16本\n')
 # file1.close()
-file1=open(r'C:\Users\Administrator\Desktop\book.text','a',encoding='utf-8')
-file1.write('小强:10本\n')
-file1.write('李明:20本\n')
-file1.close()
\ No newline at end of file
+# file1=open(r'C:\Users\Administrator\Desktop\book.text','a',encoding='utf-8')
+# file1.write('小强:10本\n')
+# file1.write('李明:20本\n')
+# file1.close()
+new_i=''
+with open(r'C:\Users\Administrator\Desktop\book.text','r',encoding='utf-8') as file1:
+#     m=file1.read()
+#     print(m) 
+    for i in file1:
+        if "小强:10本" in i:
+            i=i.replace('小强:10本','小强:40本')
+        new_i+=i
+print(new_i)
\ No newline at end of file