KeyError（“ {}都不在列中。”。format（缺少））

Question

我正在通过以下链接从事此项目：https://medium.com/cognifeed/targeting-influencers-with-machine-learning-part-1-scraping-instagram-f3c5d875fcc9

据我所知，项目的这一部分（我对机器学习和Python的了解不多，但想与项目一起学习）只是从.txt文件中提供的信息中提取信息。

我现在正在尝试在Windows 10 cmd中执行python文件，但是出现如下图所示的错误。我只是划掉了顶部，因为我错误地输入了命令a在我开始工作之前有几次，所以我不相信这对于我底部的KeyErrors没有任何用处。

以下是实际Python Shell中的回溯错误：

Traceback (most recent call last):
  File "C:\Users\nzand\AppData\Local\Programs\Python\Python38-32\lib\site-packages\selenium\webdriver\common\service.py", line 72, in start
    self.process = subprocess.Popen(cmd, env=self.env,
  File "C:\Users\nzand\AppData\Local\Programs\Python\Python38-32\lib\subprocess.py", line 854, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "C:\Users\nzand\AppData\Local\Programs\Python\Python38-32\lib\subprocess.py", line 1307, in _execute_child
    hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
FileNotFoundError: [WinError 2] The system cannot find the file specified

在处理上述异常期间，发生了另一个异常：

Traceback (most recent call last):
  File "C:\Users\nzand\Desktop\Nicholas Zachariah\Machine Learning\Projects\Instagram\SeaDeeper\cognifeed-instagram-scraper-master\main.py", line 55, in <module>
    main()
  File "C:\Users\nzand\Desktop\Nicholas Zachariah\Machine Learning\Projects\Instagram\SeaDeeper\cognifeed-instagram-scraper-master\main.py", line 43, in main
    scraper = InstagramScraper(args.chromedriver_path)
  File "C:\Users\nzand\Desktop\Nicholas Zachariah\Machine Learning\Projects\Instagram\SeaDeeper\cognifeed-instagram-scraper-master\scraper.py", line 17, in __init__
    self.browser = webdriver.Chrome(
  File "C:\Users\nzand\AppData\Local\Programs\Python\Python38-32\lib\site-packages\selenium\webdriver\chrome\webdriver.py", line 73, in __init__
    self.service.start()
  File "C:\Users\nzand\AppData\Local\Programs\Python\Python38-32\lib\site-packages\selenium\webdriver\common\service.py", line 81, in start
    raise WebDriverException(
selenium.common.exceptions.WebDriverException: Message: 'chromedriver.exe' executable needs to be in PATH. Please see https://sites.google.com/a/chromium.org/chromedriver/home

main.py中的代码：

from scraper import InstagramScraper
import pandas as pd
import argparse

parser = argparse.ArgumentParser(
    description='Scrapes instagram posts from given users.')

parser.add_argument(
    '--username_list',
    dest='username_list_path',
    default='./lists/influencers.txt',
    help='Path to the list of instagram accounts that you want scraped.')
parser.add_argument(
    '--chromedriver_path',
    dest='chromedriver_path',
    default='C:/Chromedriver/chromedriver.exe',
    help=
    'Path to Chromedriver binary. See http://chromedriver.chromium.org/getting-started'
)
parser.add_argument(
    '--out_file',
    dest='out_file',
    default='./dataset.csv',
    help=
    'The file in which the scraped info will be stored. You should name it \'filename.csv\''
)


def load_influencer_list(path):
  with open(path, 'r') as in_file:
    influencers = in_file.read().splitlines()
  return influencers


def save_data(posts_info, save_path):
  df = pd.DataFrame.from_dict(posts_info, orient='index')
  df.set_index('shortcode', inplace=True)
  df.to_csv(save_path, sep=',', encoding='utf-8')


def main():
  args = parser.parse_args()
  scraper = InstagramScraper(args.chromedriver_path)
  influencers = load_influencer_list(args.username_list_path)
  all_data = {}
  for i, influencer in enumerate(influencers):
    print("{}/{}: Getting {}'s posts...".format(i + 1, len(influencers),
                                            influencer))
    links = scraper.get_posts_from_user(influencer, 10)
    all_data.update(scraper.get_data(links))
  save_data(all_data, args.out_file)


if __name__ == "__main__":
  main()

我希望有人熟悉这个项目，并且可以帮助我理解为什么会出现这些错误。