问KeyError：“[列]中没有[索引([‘URL’]，dtype='object')]”

EN

from oauth2client.service_account import ServiceAccountCredentials
import httplib2
import json

import pandas as pd

# https://developers.google.com/search/apis/indexing-api/v3/prereqs#header_2
JSON_KEY_FILE = "/content/astute-tractor-329613-1baed60ec1c0.json"
SCOPES = ["https://www.googleapis.com/auth/indexing"]

credentials = ServiceAccountCredentials.from_json_keyfile_name(JSON_KEY_FILE, scopes=SCOPES)
http = credentials.authorize(httplib2.Http())

def indexURL(urls, http):
    # print(type(url)); print("URL: {}".format(url));return;

    ENDPOINT = "https://indexing.googleapis.com/v3/urlNotifications:publish"
    
    for u in urls:
        # print("U: {} type: {}".format(u, type(u)))
    
        content = {}
        content['url'] = u.strip()
        content['type'] = "URL_UPDATED"
        json_ctn = json.dumps(content)    
        # print(json_ctn);return
    
        response, content = http.request(ENDPOINT, method="POST", body=json_ctn)

        result = json.loads(content.decode())

        # For debug purpose only
        if("error" in result):
            print("Error({} - {}): {}".format(result["error"]["code"], result["error"]["status"], result["error"]["message"]))
        else:
            print("urlNotificationMetadata.url: {}".format(result["urlNotificationMetadata"]["url"]))
            print("urlNotificationMetadata.latestUpdate.url: {}".format(result["urlNotificationMetadata"]["latestUpdate"]["url"]))
            print("urlNotificationMetadata.latestUpdate.type: {}".format(result["urlNotificationMetadata"]["latestUpdate"]["type"]))
            print("urlNotificationMetadata.latestUpdate.notifyTime: {}".format(result["urlNotificationMetadata"]["latestUpdate"]["notifyTime"]))

"""
data.csv has 2 columns: URL and date.
I just need the URL column.
"""
csv = pd.read_csv("/content/indekseerida-1.csv")
csv[["URL"]].apply(lambda x: indexURL(x, http))

KeyError                                  Traceback (most recent call last)
<ipython-input-8-f2bea693a148> in <module>()
     44 """
     45 csv = pd.read_csv("/content/indekseerida-1.csv")
---> 46 csv[["URL"]].apply(lambda x: indexURL(x, http))

/usr/local/lib/python3.7/dist-packages/pandas/core/frame.py in __getitem__(self, key)
   2910             if is_iterator(key):
   2911                 key = list(key)
-> 2912             indexer = self.loc._get_listlike_indexer(key, axis=1, raise_missing=True)[1]
   2913 
   2914         # take() does not accept boolean indexers

/usr/local/lib/python3.7/dist-packages/pandas/core/indexing.py in _get_listlike_indexer(self, key, axis, raise_missing)
   1252             keyarr, indexer, new_indexer = ax._reindex_non_unique(keyarr)
   1253 
-> 1254         self._validate_read_indexer(keyarr, indexer, axis, raise_missing=raise_missing)
   1255         return keyarr, indexer
   1256 

/usr/local/lib/python3.7/dist-packages/pandas/core/indexing.py in _validate_read_indexer(self, key, indexer, axis, raise_missing)
   1296             if missing == len(indexer):
   1297                 axis_name = self.obj._get_axis_name(axis)
-> 1298                 raise KeyError(f"None of [{key}] are in the [{axis_name}]")
   1299 
   1300             # We (temporarily) allow for some missing keys with .loc, except in

KeyError: "None of [Index(['URL'], dtype='object')] are in the [columns]"