[Python Examples] BeautifulSoup: lambda x: x.attrs['href'].startswith('http://www.vgchartz.com/game/'), lambda x: 'href' in x.attrs and x.attrs['href'].startswith('https://www.vgchartz.com/game/')

BeautifulSoup Examples: vgchartz.com/game

포스트 난이도: HOO_Junior

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# Example Code

from bs4 import BeautifulSoup, element
import urllib
import pandas as pd
import numpy as np

pages = 19
rec_count = 0
rank = []
gname = []
platform = []
year = []
genre = []
critic_score = []
user_score = []
publisher = []
developer = []
sales_na = []
sales_pal = []
sales_jp = []
sales_ot = []
sales_gl = []

urlhead = 'https://www.vgchartz.com/gamedb/?page='
urltail = '&console=&region=All&developer=&publisher=&genre=&boxart=Both&ownership=Both'
urltail += '&results=1000&order=Sales&showtotalsales=0&showtotalsales=1&showpublisher=0'
urltail += '&showpublisher=1&showvgchartzscore=0&shownasales=1&showdeveloper=1&showcriticscore=1'
urltail += '&showpalsales=0&showpalsales=1&showreleasedate=1&showuserscore=1&showjapansales=1'
urltail += '&showlastupdate=0&showothersales=1&showgenre=1&sort=GL'


for page in range(1, pages):
    surl = urlhead + str(page) + urltail
    r = urllib.request.urlopen(surl).read()
    soup = BeautifulSoup(r)
    print(f"Page: {page}")

    # vgchartz website is really weird so we have to search for
    # <a> tags with game urls
    game_tags = list(filter(
        #lambda x: x.attrs['href'].startswith('https://www.vgchartz.com/game/'),
        #lambda x: x.attrs['href'].startswith('https://www.vgchartz.com/game/'),
        lambda x: 'href' in x.attrs and x.attrs['href'].startswith('https://www.vgchartz.com/game/'),
        # discard the first 10 elements because those
        # links are in the navigation bar
        soup.find_all("a")
    ))[10:]

    for tag in game_tags:

        # add name to list
        gname.append(" ".join(tag.string.split()))
        print(f"{rec_count + 1} Fetch data for game {gname[-1]}")

        # get different attributes
        # traverse up the DOM tree
        data = tag.parent.parent.find_all("td")
        rank.append(np.int32(data[0].string))
        platform.append(data[3].find('img').attrs['alt'])
        publisher.append(data[4].string)
        developer.append(data[5].string)
        critic_score.append(
            float(data[6].string) if
            not data[6].string.startswith("N/A") else np.nan)
        user_score.append(
            float(data[7].string) if
            not data[7].string.startswith("N/A") else np.nan)
        sales_na.append(
            float(data[9].string[:-1]) if
            not data[9].string.startswith("N/A") else np.nan)
        sales_pal.append(
            float(data[10].string[:-1]) if
            not data[10].string.startswith("N/A") else np.nan)
        sales_jp.append(
            float(data[11].string[:-1]) if
            not data[11].string.startswith("N/A") else np.nan)
        sales_ot.append(
            float(data[12].string[:-1]) if
            not data[12].string.startswith("N/A") else np.nan)
        sales_gl.append(
            float(data[8].string[:-1]) if
            not data[8].string.startswith("N/A") else np.nan)
        release_year = data[13].string.split()[-1]
        # different format for year
        if release_year.startswith('N/A'):
            year.append('N/A')
        else:
            if int(release_year) >= 80:
                year_to_add = np.int32("19" + release_year)
            else:
                year_to_add = np.int32("20" + release_year)
            year.append(year_to_add)

        # go to every individual website to get genre info
        url_to_game = tag.attrs['href']
        site_raw = urllib.request.urlopen(url_to_game).read()
        sub_soup = BeautifulSoup(site_raw, "html.parser")
        # again, the info box is inconsistent among games so we
        # have to find all the h2 and traverse from that to the genre name
        h2s = sub_soup.find("div", {"id": "gameGenInfoBox"}).find_all('h2')
        # make a temporary tag here to search for the one that contains
        # the word "Genre"
        temp_tag = element.Tag
        for h2 in h2s:
            if h2.string == 'Genre':
                temp_tag = h2
        genre.append(temp_tag.next_sibling.string)

        rec_count += 1

columns = {
    'Rank': rank,
    'Name': gname,
    'Platform': platform,
    'Year': year,
    'Genre': genre,
    'Critic_Score': critic_score,
    'User_Score': user_score,
    'Publisher': publisher,
    'Developer': developer,
    'NA_Sales': sales_na,
    'PAL_Sales': sales_pal,
    'JP_Sales': sales_jp,
    'Other_Sales': sales_ot,
    'Global_Sales': sales_gl
}
print(rec_count)
df = pd.DataFrame(columns)
print(df.columns)
df = df[[
    'Rank', 'Name', 'Platform', 'Year', 'Genre',
    'Publisher', 'Developer', 'Critic_Score', 'User_Score',
    'NA_Sales', 'PAL_Sales', 'JP_Sales', 'Other_Sales', 'Global_Sales']]
df.to_csv("vgsales.csv", sep=",", encoding='utf-8', index=False)


if __name__ == '__main__':
    try:
        main()
    except KeyboardInterrupt:
        print('Interrupted')
        try:
            sys.exit(0)
        except SystemExit:
            os._exit(0)

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기존 vgchartz.com/game 코드에는 오류가 있기 때문에 오류 부분을 수정해서 게임 리스트를 csv 파일로 가져올 수 있게 하였다.

 

일단 BeautifulSoup를 import 해줘야 하며, http를 https로 변경해줘야 한다.

 

다음으로 lambda x: x.attrs['href'].startswith('https://www.vgchatz.com/game/') 부분에 대한 코드 작성을 수정해줘야 한다.  lambda x: 'href' in x.attrs and x.attrs['href'].startswith로 코드 수정을 해주면 오류 문제가 해결된다.

 

마지막으로 if __name__ == '__main__':으로 예외 경우를 처리하는 경우에 대해서 제시해줌으로써 게임 리스트 데이터를 csv 파일로 변환하여 저장할 수 있다.

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