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0基础学python(4)

  • 2026-01-20 23:50:25
0基础学python(4)
    今天我们继续来学习导入与注释。有人会问，注释是什么。注释顾名思义就是不执行的，给别人看的，我们在python中可以用符号“#”来表示。如:
print("hello python")#打印python
    接下来是导入，就是import，就比如导入数学，就是import math。一些库是不用下载的，如：math、tk……。还有要pip install下载的，如：pprint……
    还有一些彩蛋：导入this是python之禅……等等等等。
    下期预告：数据类型与变量。
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  1. CONNECT:[ UseTime:0.001084s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001476s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.005693s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000674s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001476s ]
  6. SELECT * FROM `set` [ RunTime:0.000630s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001584s ]
  8. SELECT * FROM `article` WHERE `id` = 462696 LIMIT 1 [ RunTime:0.000991s ]
  9. UPDATE `article` SET `lasttime` = 1770562065 WHERE `id` = 462696 [ RunTime:0.010992s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.009118s ]
  11. SELECT * FROM `article` WHERE `id` < 462696 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.006578s ]
  12. SELECT * FROM `article` WHERE `id` > 462696 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001219s ]
  13. SELECT * FROM `article` WHERE `id` < 462696 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003715s ]
  14. SELECT * FROM `article` WHERE `id` < 462696 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003546s ]
  15. SELECT * FROM `article` WHERE `id` < 462696 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003392s ]
0.225684s