在Python 3中直接從網站讀取csv文件

Question

我試圖直接從網站（從可下載的鏈接）讀取CSV文件，然后將其列之一作為列表獲取，以便我可以進一步使用它。 我無法正確編碼。 我到達的最近的是

import csv
import urllib.request as urllib
import urllib.request as urlRequest
import urllib.parse as urlParse

url = "https://www.nseindia.com/content/indices/ind_nifty50list.csv"
# pretend to be a chrome 47 browser on a windows 10 machine
headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36"}
req = urlRequest.Request(url, headers = headers)
# open the url 
x = urlRequest.urlopen(req)
sourceCode = x.read()

Answer 1

您非常接近目標。

只需按行分割讀取的CSV數據，然后將其傳遞給csv.reader（）：

import csv
import urllib.request as urllib
import urllib.request as urlRequest
import urllib.parse as urlParse

url = "https://www.nseindia.com/content/indices/ind_nifty50list.csv"
# pretend to be a chrome 47 browser on a windows 10 machine
headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36"}
req = urlRequest.Request(url, headers = headers)
# open the url 
x = urlRequest.urlopen(req)
sourceCode = x.read()

cr = csv.DictReader(sourceCode.splitlines())
l = [row['Series'] for row in cr]

但是請注意， x.read()返回bytearray ，因此，如果csv包含非ASCII符號，請不要忘記添加：

 x.read().decode('utf-8') # or another encoding you need