我正在嘗試從維基百科獲取并解析一些數(shù)據(jù)以進(jìn)行分析。我正在嘗試提取數(shù)據(jù)來(lái)分析列中因素與幸福分?jǐn)?shù)本身之間的相關(guān)性。但該文件未按預(yù)期工作。事實(shí)上，最終的文件是空的。我嘗試調(diào)試，但沒(méi)有成功：import requestsimport bs4from bs4 import BeautifulSoupimport csvfrom csv import DictWriterdef get_page(url):    html_file = requests.get(url)    return html_filedef parse_html(html_file):    parsed_html = bs4.BeautifulSoup(html_file.text, 'html.parser')        t = parsed_html.find_all('table')[1]        tr = t.find_all('tr')[0]    headers = []    for header in tr:        for z in header:            if isinstance(z, bs4.element.NavigableString):                header_name = z.strip()                headers.append(header_name)        headers_original = headers    countries = []    prev_rank = ""    for ln, row in enumerate(t.find_all('tr')[2:]):        country = {}        i = 0        col_values = row.find_all('td')                while i < len(headers):            col = col_values[i]            value = col.text.strip()                            if headers[i] in ('Country or region',):                value = str(value)            else:                value = float(value)            country[headers[i]] = value            i += 1        countries.append(country)    return headers, countriesdef write_csv(filename, data, fieldnames):    with open(filename, 'w') as csvfile:        writer = csv.DictWriter(csvfile, fieldnames=fieldnames)        writer.writeheader()        writer.writerows(data)def main():    source = "https://en.wikipedia.org/wiki/World_Happiness_Report"    print(f'Fetching URL {source}...')    page = get_page(source)    print(f'Parsing {source}...')    headers, countries = parse_html(page)    print(f'Writing to a CSV file 1...')    write_csv('worldhappiness.csv', countries, headers)    print(f'Parsing table 3 (simpler table) {source} ...')    headers, countries = parse_html(page)