當我嘗試向MySQL插入數據時出現此錯誤 - >「TypeError：並非在字符串格式化過程中轉換的所有參數」

Question

我從亞馬遜刮取一些數據，然後將這些數據插入到4列表中。但是當我試圖將這些列表插入數據庫時​​，我只是得到一個類型錯誤：

TypeError: not all arguments converted during string formatting 

但是所有的數據都是字符串格式。我嘗試使用元組，但它不工作。

# Importing Requests and BeautifulSoup Module 
import requests 
from bs4 import BeautifulSoup 
import pymysql 

# Setting Base Url 
base_url = "https://www.amazon.com/s/ref=lp_6503737011_pg_2?rh=n%3A16310101%2Cn%3A%2116310211%2Cn%3A2983386011%2Cn%3A6503737011&page=" 

# Setting range for pagination 
pagination = list(range(1,3)) 

# Declaring Empty Data 
name   = [] 
retailer  = [] 
price  = [] 
image_link = [] 


# Looping through pagination 
for num in pagination: 
    url = base_url + str(num) 
    # Connection Error Handler 
    try: 
     r = requests.get(url) 
    except requests.exceptions.ConnectionError: 
     r.status_code = "Connection refused" 
     print("Connection Refused by the server") 
    # Setting BeautifulSoup Object 
    soup = BeautifulSoup(r.content, "html.parser") 

    # Setting Div Class of Info 
    g_data = soup.find_all("div", {"class": "s-item-container"}) 

    # Getting Every Data from Info Div 
    for item in g_data: 
      imgs = soup.findAll("img", {"class":"s-access-image"}) 
      for img in imgs: 
       image_link.append(img['src']) 

      name.append(item.contents[2].find_all('h2', {'class':'s-access-title'})[0].text) 
      retailer.append(item.contents[2].find_all('span', {'class':'a-size-small'})[1].text) 
      whole_number = str(item.contents[3].find_all('span', {'class':'sx-price-whole'})[0].text) 
      fractional_number = str(item.contents[3].find_all('sup', {'class':'sx-price-fractional'})[0].text) 

      price_1 = whole_number+"."+fractional_number 
      price.append(price_1) 

這是刮數據的代碼。所有這一切都很好。但是當我嘗試將數據插入數據庫時​​，我遇到了問題。

import pymysql 
db = pymysql.connect('localhost','root','','scrape') 
cursor = db.cursor() 

sql = """INSERT INTO wine(
NAME,RETAILER,PRICE,IMAGE_LINK) VALUES" 
""" 
cursor.executemany(sql, (name,retailer,price,image_link)) 

同時運行此代碼我收到此錯誤：

TypeError         Traceback (most recent call last) 
<ipython-input-7-0fca81edd73c> in <module>() 
     6 NAME,RETAILER,PRICE,IMAGE_LINK) VALUES" 
     7 """ 
----> 8 cursor.executemany(sql, (name,retailer,price,image_link)) 

C:\Anaconda3\lib\site-packages\pymysql\cursors.py in executemany(self, query, args) 
    193           self._get_db().encoding) 
    194 
--> 195   self.rowcount = sum(self.execute(query, arg) for arg in args) 
    196   return self.rowcount 
    197 

C:\Anaconda3\lib\site-packages\pymysql\cursors.py in <genexpr>(.0) 
    193           self._get_db().encoding) 
    194 
--> 195   self.rowcount = sum(self.execute(query, arg) for arg in args) 
    196   return self.rowcount 
    197 

C:\Anaconda3\lib\site-packages\pymysql\cursors.py in execute(self, query, args) 
    162    pass 
    163 
--> 164   query = self.mogrify(query, args) 
    165 
    166   result = self._query(query) 

C:\Anaconda3\lib\site-packages\pymysql\cursors.py in mogrify(self, query, args) 
    141 
    142   if args is not None: 
--> 143    query = query % self._escape_args(args, conn) 
    144 
    145   return query 

TypeError: not all arguments converted during string formatting 

我無法找到任何解決方案來解決這個問題。請幫忙。

Answer 1

1. 您的查詢是不完整的：您需要佔位符，例如%s
2. .executemany()以容器的容器作爲第二個參數;通常這是元組

更改到的列表：

sql = """INSERT INTO wine(NAME,RETAILER,PRICE,IMAGE_LINK) VALUES (%s,%s,%s,%s);""" 

to_insert = [(a,b,c,d) for a,b,c,d in zip(name,retailer,price,image_link)] 
cursor.executemany(sql,to_insert)