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python学习记录(6)

  • 2026-03-23 03:59:54
python学习记录(6)
跳转语句：如果希望在中间离开循环，可以使用以下俩中方法：
1.使用continue语句直接跳到循环的下一次迭代。在while语句中使用continue语句流程图：
逢七拍腿游戏，cuntinue语句应用举例：
运行结果：
运用continue语句，在条件满足时跳出当前循环，开始下一次循环。
2.使用break完全中止循环。在for语句中使用break语句流程图：
pass空语句，起到占位作用，不做任何事情。
小结：学完了本章内容，学习了选择语句，循环语句，bieak语句，continue跳转语句及pass孔语句。不能说完全学会了，只能说已经学过了，以后有看到类似的语句能知道我学习过了，而如果要自己写一个代码，有一个基本的方向和意识。
以下是根据学习内容，自己写的一个小程序，模拟10086查询功能，代码如下：
运行后结果：
本文来自网友投稿或网络内容，如有侵犯您的权益请联系我们删除，联系邮箱：wyl860211@qq.com 。

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  1. CONNECT:[ UseTime:0.000786s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000825s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000323s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000278s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000506s ]
  6. SELECT * FROM `set` [ RunTime:0.000236s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000595s ]
  8. SELECT * FROM `article` WHERE `id` = 481573 LIMIT 1 [ RunTime:0.000439s ]
  9. UPDATE `article` SET `lasttime` = 1774601669 WHERE `id` = 481573 [ RunTime:0.000647s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000227s ]
  11. SELECT * FROM `article` WHERE `id` < 481573 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001556s ]
  12. SELECT * FROM `article` WHERE `id` > 481573 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000355s ]
  13. SELECT * FROM `article` WHERE `id` < 481573 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003116s ]
  14. SELECT * FROM `article` WHERE `id` < 481573 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.011029s ]
  15. SELECT * FROM `article` WHERE `id` < 481573 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001937s ]
0.170906s