1
我正試圖在mySQL數據庫中插入scraped items('title')。(Python 3.6)TypeError:無法將字節連接到元組
這是我spider.py文件的片段,刮「標題」內容:
#get more details
def parse_detail_page(self, response):
item = response.meta["item"]
#title
title = response.xpath(".//*[@id='titletextonly']/text()").extract()[0]
item["title"] = title
return item
這是我pipelines.py文件:
import pymysql.cursors
class mySQLTest(object):
def __init__(self):
self.conn = pymysql.connect(host='localhost',
user='root',
password='',
db='testDB',
charset='utf8mb4',
cursorclass=pymysql.cursors.DictCursor)
self.cursor = self.conn.cursor()
def process_item (self, item, spider):
sql = "INSERT INTO items (title) VALUES (%s)", (item['title'])
self.cursor.execute(sql)
self.conn.commit()
return item
我遇到了以下錯誤:
Traceback (most recent call last):
File "/Users/venv1/lib/python3.6/site-packages/twisted/internet/defer.py", line 653, in _runCallbacks
current.result = callback(current.result, *args, **kw)
File "/Users/venv1/tutorial/tutorial/pipelines.py", line 31, in process_item
self.cursor.execute(sql)
File "/Users/venv1/lib/python3.6/site-packages/pymysql/cursors.py", line 166, in execute
result = self._query(query)
File "/Users/sandysu/PyCharmProjects/venv1/lib/python3.6/site-packages/pymysql/cursors.py", line 322, in _query
conn.query(q)
File "/Users/venv1/lib/python3.6/site-packages/pymysql/connections.py", line 855, in query
self._execute_command(COMMAND.COM_QUERY, sql)
File "/Users/venv1/lib/python3.6/site-packages/pymysql/connections.py", line 1091, in _execute_command
packet = prelude + sql[:packet_size-1]
TypeError: can't concat bytes to tuple
這是什麼類型錯誤:不能Concat的字節元組是什麼意思?它應該如何解決?
如果你使用:'SQL = 「INSERT INTO項目(標題)VALUES(」 +項目[ '標題'] +「)」'而不是? – nikpod
'sql =「INSERT INTO items(title)VALUES({0})」。format(item ['title'])' – user3450049
@ user3450049 - 你能澄清{0}的用途嗎?我嘗試了你的建議並得到了這個錯誤:pymysql.err.ProgrammingError:(1064,「你的SQL語法有錯誤;檢查與你的MariaDB服務器版本相對應的手冊, s/s電器 - h/w地板 - 可用:7月1日在1號線) 作爲參考,'標題'scraped讀取如下:'AAA主要位置 - s/s電器 - h/w地板 - Avail :7月1日'。 – slsu