Question

`Traceback (most recent call last):
  File "fmcrawler_sql.py", line 317, in <module>
    crawl(initFighter=fighter,K=4)
  File "fmcrawler_sql.py", line 114, in crawl
    write_page_to_database(initFighterURL,cur)
  File "fmcrawler_sql.py", line 292, in write_page_to_database
    write_fights_to_database(fights,cur)
  File "fmcrawler_sql.py", line 211, in write_fights_to_database
    fightId = hash(bothFighters+fight['Event'])
  TypeError: cannot concatenate 'str' and 'list' objects
`

这些线有什么问题？

Answer 1

阅读TypeError：你有一个字符串和列表......列表是显而易见的，所以你需要从列表中取出'Event'并与另一个变量连接 - 然后放回到名单。取决于你的需要。

>>> ['a']+['b']
['a', 'b']
>>> l = ['b']
>>> ['a' + l[0]]
['ab']
>>>

Answer 2

无法真正了解您发布的内容，但此错误非常常见。在实际代码中的某处，您尝试连接（或添加）字符串和列表。问题出现在这里：

File "fmcrawler_sql.py", line 211, in write_fights_to_database
fightId = hash(bothFighters+fight['Event'])
    TypeError: cannot concatenate 'str' and 'list' objects

我猜测bothFighters是一个列表而fight['Event']是一个字符串。将字符串更改为列表，错误可能会消失。（Python允许您一起添加＆＃34;列表，使用两个列表的第一级条目创建更长的列表）。

如果您仍需要帮助，请使用您的代码进行更新。

List concatenation in Python

String concatenation basics if you ever need 'em.

数据库：TypeError：无法连接＆＃39; str＆＃39;和＆＃39;列出＆＃39;对象

2 个答案: