auto save

diy2.py

-for i in range(1,1000):   # 行
-    for j in range(1,i+1):   # 列
-        print(i,"x",j,"=",(j*i),end="  ")
-    print()    
\ No newline at end of file
+# fliel=open(r'C:\Users\mayi\Desktop\test.txt','a',encoding='utf_8')
+# fliel.write('小兰:12本\n')
+# fliel.write('小丽:11本\n')
+# fliel.write('李文:9本\n')
+# fliel.write('张伟:15本\n')
+# fliel.close()
+
+# with open(r'C:\Users\mayi\Desktop\test.txt','a',encoding='utf_8') as fliel:
+#     fliel.write('maobo:50')
+
+with open(r'C:\Users\mayi\Desktop\test.txt','r',encoding='utf_8') as fliel:
+    new_data=''
+    for data in fliel:
+        if '小丽:11本' in data:
+            data=data.replace('小丽:11本','小丽:15本')
+        new_data+=data
+print(new_data)
+with open(r'C:\Users\mayi\Desktop\test.txt','w',encoding='utf_8') as fliel:
+    fliel.write(new_data)
\ No newline at end of file