![](/img/trans.png)
[英]“IndexError: tuple index out of range” when formatting string in Python
[英]IndexError: tuple index out of range — String formatting
我正在制作一個小型的圖像板,我正在嘗試進行MySQL插入,但是這段代碼拋出了一個錯誤:
curs.execute("INSERT INTO posts(date,replies,title,link,text,userip,username) VALUES('{}',{},'{}','{}','{}','{}','{}');".format((self.date.isoformat(),self.replies,self.title,self.embed,self.text,self.userip,self.username)))
這是錯誤(在Falcon / WSGI之上運行):
2015-05-05 17:37:14,135 :Traceback (most recent call last):
2015-05-05 17:37:14,136 : File "/bin/user_wsgi_wrapper.py", line 130, in __call__
2015-05-05 17:37:14,136 : self.error_log_file.logger.exception("Error running WSGI application")
2015-05-05 17:37:14,136 : File "/usr/lib/python2.7/logging/__init__.py", line 1185, in exception
2015-05-05 17:37:14,136 : self.error(msg, *args, **kwargs)
2015-05-05 17:37:14,136 : File "/usr/lib/python2.7/logging/__init__.py", line 1178, in error
2015-05-05 17:37:14,136 : self._log(ERROR, msg, args, **kwargs)
2015-05-05 17:37:14,136 : File "/usr/lib/python2.7/logging/__init__.py", line 1270, in _log
2015-05-05 17:37:14,137 : record = self.makeRecord(self.name, level, fn, lno, msg, args, exc_info, func, extra)
2015-05-05 17:37:14,137 : File "/usr/lib/python2.7/logging/__init__.py", line 1244, in makeRecord
2015-05-05 17:37:14,137 : rv = LogRecord(name, level, fn, lno, msg, args, exc_info, func)
2015-05-05 17:37:14,137 : File "/usr/lib/python2.7/logging/__init__.py", line 284, in __init__
2015-05-05 17:37:14,137 : self.threadName = threading.current_thread().name
2015-05-05 17:37:14,137 : File "/usr/lib/python2.7/threading.py", line 1160, in currentThread
2015-05-05 17:37:14,137 : return _active[_get_ident()]
2015-05-05 17:37:14,137 : File "/bin/user_wsgi_wrapper.py", line 122, in __call__
2015-05-05 17:37:14,138 : app_iterator = self.app(environ, start_response)
2015-05-05 17:37:14,138 : File "/home/isitcoldinfallschurch/.virtualenvs/myvirtualenv/local/lib/python2.7/site-packages/falcon/api.py", line 175, in __call__
2015-05-05 17:37:14,138 : responder(req, resp, **params)
2015-05-05 17:37:14,138 : File "./new.py", line 89, in on_post
2015-05-05 17:37:14,139 : thispost.insertdb()
2015-05-05 17:37:14,139 : File "./new.py", line 57, in insertdb
2015-05-05 17:37:14,140 : curs.execute("INSERT INTO posts(date,replies,title,link,text,userip,username) VALUES('{}',{},'{}','{}','{}','{}','{}');".format((self.date.isoformat(),self.replies,self.title,self.embed,self.text,self.userip,self.username)))
2015-05-05 17:37:14,140 :IndexError: tuple index out of range
我怎么能糾正這個?
您的.format
輸入中有額外的括號,這樣做(將輸入視為單個元組)。
概念證明:
>>> "{}{}".format((1,2))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
IndexError: tuple index out of range
>>> "{}{}".format(1,2)
'12'
所以不要這樣
curs.execute("INSERT INTO posts(date,replies,title,link,text,userip,username) VALUES('{}',{},'{}','{}','{}','{}','{}');".format((self.date.isoformat(),self.replies,self.title,self.embed,self.text,self.userip,self.username)))
做這個
curs.execute("INSERT INTO posts(date,replies,title,link,text,userip,username) VALUES('{}',{},'{}','{}','{}','{}','{}');".format(self.date.isoformat(),self.replies,self.title,self.embed,self.text,self.userip,self.username))
正如@chepner在下面的評論中指出的,更好的方法是使用下面的方法,其中%s
由游標填充,使用作為第二個參數執行的元組執行:
curs.execute("INSERT INTO posts(date,replies,title,link,text,userip,username) VALUES(%s, %s, %s, %s, %s, %s, %s);", (self.date.isoformat(), self.replies, self.title, self.embed, self.text, self.userip, self.username))
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.