auto save

diy.py

@@ -4,7 +4,22 @@
 #file1.write('小强：10本\n')
 #file1.write('李明：15本\n')
 #file1.close()
-with open(r'C:\Users\Administrator\Desktop\test.txt','a',encoding = 'utf-8') as file1:
-   file1.write('小丽：11本\n')
-   file1.write('李文：9本\n')
-   file1.write('张伟：16本\n')
\ No newline at end of file
+#with open(r'C:\Users\Administrator\Desktop\test.txt','a',encoding = 'utf-8') as file1:
+#   file1.write('小丽：11本\n')
+#   file1.write('李文：9本\n')
+#   file1.write('张伟：16本\n')
+new_data = ''
+with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding = 'utf-8') as file1:
+#   a = file1.read()
+#   print(a)
+   for data in file1:
+      if '李文：10本' in data:
+         data = data.replace('李文：10本','李文：11本')
+      new_data += data
+
+
+with open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding = 'utf-8') as file1:
+   file1.write(new_data)
+with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding = 'utf-8') as file1:
+   a = file1.read()
+   print(a)
\ No newline at end of file