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90%python初学者都踩过的坑

  • 2026-06-30 08:20:32
90%python初学者都踩过的坑

90%python初学者都踩过的坑

整理了10个Python初学者高频踩坑点+解决方法，全是血泪教训！
✅ 缩进混用Tab和空格，直接报IndentationError
✅ if/for后漏写冒号，代码块直接“罢工”
✅ 字符串+数字拼接，疯狂报TypeError
✅ 列表索引越界，print(num[3])直接翻车
✅ 字典取值Key不存在，直接报错终止程序
✅ 把=和==搞混，判断逻辑全乱套
✅ input输入的数字不转类型，运算直接报错
✅ 循环删列表元素，越删越乱
✅ 函数没写return，结果全是None
✅ 导入模块直接报错，忘了先pip install

新手学编程，真的不是你笨！很多坑都是没人教才会踩的。
建议直接收藏，写代码前翻一翻，少走一年弯路！

#Python #Python入门 #Python学习 #编程小白 #Python避坑 #Python报错 #零基础学Python

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  1. CONNECT:[ UseTime:0.000575s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000607s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000517s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.018631s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000744s ]
  6. SELECT * FROM `set` [ RunTime:0.009838s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000692s ]
  8. SELECT * FROM `article` WHERE `id` = 493237 LIMIT 1 [ RunTime:0.019157s ]
  9. UPDATE `article` SET `lasttime` = 1783082684 WHERE `id` = 493237 [ RunTime:0.018657s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000875s ]
  11. SELECT * FROM `article` WHERE `id` < 493237 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.031054s ]
  12. SELECT * FROM `article` WHERE `id` > 493237 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.027815s ]
  13. SELECT * FROM `article` WHERE `id` < 493237 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.082660s ]
  14. SELECT * FROM `article` WHERE `id` < 493237 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.038056s ]
  15. SELECT * FROM `article` WHERE `id` < 493237 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.047038s ]
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