為什么我不能為一個專案附加字典索引而我可以為任何其他專案？-有解無憂

# Import libraries
from bs4 import BeautifulSoup
import requests
import pandas as pd
import time
import ast

start_time = time.time()
s = requests.Session()

#Get URL and extract content
page=1
traits = []
accessories, backgrounds, shoes = [], [], []

while page != 100:

    params = {
        ('arg', f"Qmer3VzaeFhb7c5uiwuHJbRuVCaUu72DcnSoUKb1EvnB2x/{page}"),
    }

    content = s.get('https://ipfs.infura.io:5001/api/v0/cat', params=params, auth=('', ''))
    soup = BeautifulSoup(content.text, 'html.parser')
    page = page   1
    
    traits = ast.literal_eval(soup.text)['attributes']

    df = pd.DataFrame(traits)
    df1 = df[df['trait_type']=='ACCESSORIES']

    accessories.append(df1['value'].values[0])

誰能向我解釋我做錯了什么？當我運行上面的代碼時，我收到以下錯誤：

IndexError: index 0 is out of bounds for axis 0 with size 0

但是，每當我使用不同的索引（如 BackgroundS 或 SHOES 而不是附件）時，就像下面的代碼一樣，我不會收到上述錯誤并且它運行得很好。

# Import libraries
from bs4 import BeautifulSoup
import requests
import pandas as pd
import time
import ast

start_time = time.time()
s = requests.Session()

#Get URL and extract content
page=1
traits = []
accessories, backgrounds, shoes = [], [], []

while page != 100:

    params = {
        ('arg', f"Qmer3VzaeFhb7c5uiwuHJbRuVCaUu72DcnSoUKb1EvnB2x/{page}"),
    }

    content = s.get('https://ipfs.infura.io:5001/api/v0/cat', params=params, auth=('', ''))
    soup = BeautifulSoup(content.text, 'html.parser')
    page = page   1
    
    traits = ast.literal_eval(soup.text)['attributes']

    df = pd.DataFrame(traits)
    df1 = df[df['trait_type']=='BACKGROUND']

    backgrounds.append(df1['value'].values[0])

這里有人能幫我弄清楚我在兩個代碼之間做的不同或錯誤嗎？

PS 當運行任一代碼直到追加行時，背景和附件都列在 df 和 df1 中。只有當我添加 append 行時，ACCESSORIES 索引才會消失，但這不會發生在背景或鞋子上。

uj5u.com熱心網友回復：

下面的代碼解決了這個問題：

# Import libraries
from bs4 import BeautifulSoup
import requests
import pandas as pd
import time
import ast

start_time = time.time()
s = requests.Session()

#Get URL and extract content
page=1
traits = []
accessories, backgrounds, shoes = [], [], []

while page != 100:

    params = {
        ('arg', f"Qmer3VzaeFhb7c5uiwuHJbRuVCaUu72DcnSoUKb1EvnB2x/{page}"),
    }

    content = s.get('https://ipfs.infura.io:5001/api/v0/cat', params=params, auth=('', ''))
    soup = BeautifulSoup(content.text, 'html.parser')
    page = page   1
    
    traits = ast.literal_eval(soup.text)['attributes']

    df = pd.DataFrame(traits)
    df1 = df[df['trait_type']=='ACCESSORIES']

    try:
        accessories.append(df1['value'].values[0])
    except:
        pass

轉載請註明出處，本文鏈接：https://www.uj5u.com/shujuku/361679.html

標籤：Python 蟒蛇-3.x 网页抓取 ipfs

上一篇：使用Rvest從網路中提取影像

下一篇：嘗試提取json時出現JSONDecodeError