TypeError：列表索引必须是整数或切片，而不是str为什么列表索引不是数字

Question

import requests
from bs4 import BeautifulSoup
import urllib.request
import re

with open('crawlingweb.csv')as f:
    content=f.readlines()
    content=[x.strip() for x in content]

for i in content:
    content[i].replace('[', '').replace(']', '')
    req = requests.get(content[i])
    html = req.text
    data = re.sub('[^0-9a-zA-Z\\s\\.\\,]', '', string=html).lower()
    data = re.sub('<[^>]*>', '', string=html)
    data = re.sub('[^ ㄱ-ㅣ가-힣]+', '', string=html)
    print(data)

content [i] .replace（'['，）.replace（']'，''）这行是错误的我想要的是重复此代码，然后一次将内容中的整个地址抓取并打印出来。

import requests
from bs4 import BeautifulSoup
import urllib.request
import re

with open('crawlingweb.csv')as f:
    content=f.readlines()
    content=[x.strip() for x in content]
    content[183].replace('[','').replace(']','')

req = requests.get(content[183])
html = req.text

data = re.sub('[^0-9a-zA-Z\\s\\.\\,]', '', string=html).lower()
data = re.sub('<[^>]*>','',string=html)
data = re.sub('[^ ㄱ-ㅣ가-힣]+','',string=html)
print(data)

此代码有效

谢谢您的阅读

Answer 1

因为

with open('crawlingweb.csv')as f:               # this is a file
    content=f.readlines()                       # this is a list of strings
    content=[x.strip() for x in content]        # this is still a list of strings

for i in content:               # i is a string

您想要的是：

for index,line  in enumerate(content):
    content[index] = line.replace('[', '').replace(']', '')

或像这样进一步做：

with open('crawlingweb.csv')as f:               
    content=f.readlines()                       
    content=[x.strip().replace('[', '').replace(']', '') for x in content]