Python 如何使用pandas将多个XPath转换为数据帧?
我开始为2018年美国职业棒球大联盟的投手们拼搏。我有各种类别,我想变成一个数据框,以便我可以打印到excel。我想用熊猫。这是我目前的代码:Python 如何使用pandas将多个XPath转换为数据帧?,python,pandas,dataframe,xpath,web-scraping,Python,Pandas,Dataframe,Xpath,Web Scraping,我开始为2018年美国职业棒球大联盟的投手们拼搏。我有各种类别,我想变成一个数据框,以便我可以打印到excel。我想用熊猫。这是我目前的代码: from urllib.request import urlopen from lxml.html import fromstring url = "https://www.baseball-reference.com/leagues/MLB/2018-standard-pitching.shtml" #remove HTML comment mar
from urllib.request import urlopen
from lxml.html import fromstring
url = "https://www.baseball-reference.com/leagues/MLB/2018-standard-pitching.shtml"
#remove HTML comment markup
content = str(urlopen(url).read())
comment = content.replace("-->","").replace("<!--","")
tree = fromstring(comment)
for pitcher_row in tree.xpath('//table[contains(@class,"stats_table")]//tr[contains(@class,"full_table")]'):
names = pitcher_row.xpath('.//td[@data-stat="player"]/a')[0].text
age = pitcher_row.xpath('.//td[@data-stat="age"]/text()')[0]
w = pitcher_row.xpath('.//td[@data-stat="W"]/text()')[0]
l = pitcher_row.xpath('.//td[@data-stat="L"]/text()')[0]
g = pitcher_row.xpath('.//td[@data-stat="G"]/text()')[0]
gs = pitcher_row.xpath('.//td[@data-stat="GS"]/text()')[0]
ip = pitcher_row.xpath('.//td[@data-stat="IP"]/text()')[0]
hits = pitcher_row.xpath('.//td[@data-stat="H"]/text()')[0]
runs = pitcher_row.xpath('.//td[@data-stat="R"]/text()')[0]
bb = pitcher_row.xpath('.//td[@data-stat="BB"]/text()')[0]
so = pitcher_row.xpath('.//td[@data-stat="SO"]/text()')[0]
#print data
print(names, age, w, l, g, gs, ip, hits, runs, bb, so)
不过,我想使用上面的数据。不确定是否需要附加数据
谢谢 如何实例化一个空数据帧并按行追加您的已刮取数据:
columns = ("names", "age", "w", "l", "g", "gs", "ip", "hits", "runs", "bb", "so")
df = pd.DataFrame(columns=columns)
for idx, pitcher_row in enumerate(tree.xpath('//table[contains(@class,"stats_table")]//tr[contains(@class,"full_table")]')):
tmp = []
tmp.append(pitcher_row.xpath('.//td[@data-stat="player"]/a')[0].text)
tmp.append(pitcher_row.xpath('.//td[@data-stat="age"]/text()')[0])
tmp.append(pitcher_row.xpath('.//td[@data-stat="W"]/text()')[0])
...
df.loc[idx] = tmp
如果您想继续使用大部分代码,则更简单:
columns = ("names", "age", "w", "l", "g", "gs", "ip", "hits", "runs", "bb", "so")
df = pd.DataFrame(columns=columns)
for idx, pitcher_row in enumerate(tree.xpath('//table[contains(@class,"stats_table")]//tr[contains(@class,"full_table")]')):
names = pitcher_row.xpath('.//td[@data-stat="player"]/a')[0].text
age = pitcher_row.xpath('.//td[@data-stat="age"]/text()')[0]
w = pitcher_row.xpath('.//td[@data-stat="W"]/text()')[0]
l = pitcher_row.xpath('.//td[@data-stat="L"]/text()')[0]
g = pitcher_row.xpath('.//td[@data-stat="G"]/text()')[0]
gs = pitcher_row.xpath('.//td[@data-stat="GS"]/text()')[0]
ip = pitcher_row.xpath('.//td[@data-stat="IP"]/text()')[0]
hits = pitcher_row.xpath('.//td[@data-stat="H"]/text()')[0]
runs = pitcher_row.xpath('.//td[@data-stat="R"]/text()')[0]
bb = pitcher_row.xpath('.//td[@data-stat="BB"]/text()')[0]
so = pitcher_row.xpath('.//td[@data-stat="SO"]/text()')[0]
df.loc[idx] = (names, age, w, l, g, gs, ip, hits, runs, bb, so)
你的作品完美无缺@petezurich!非常感谢您的时间和努力,先生。非常感谢=)
columns = ("names", "age", "w", "l", "g", "gs", "ip", "hits", "runs", "bb", "so")
df = pd.DataFrame(columns=columns)
for idx, pitcher_row in enumerate(tree.xpath('//table[contains(@class,"stats_table")]//tr[contains(@class,"full_table")]')):
names = pitcher_row.xpath('.//td[@data-stat="player"]/a')[0].text
age = pitcher_row.xpath('.//td[@data-stat="age"]/text()')[0]
w = pitcher_row.xpath('.//td[@data-stat="W"]/text()')[0]
l = pitcher_row.xpath('.//td[@data-stat="L"]/text()')[0]
g = pitcher_row.xpath('.//td[@data-stat="G"]/text()')[0]
gs = pitcher_row.xpath('.//td[@data-stat="GS"]/text()')[0]
ip = pitcher_row.xpath('.//td[@data-stat="IP"]/text()')[0]
hits = pitcher_row.xpath('.//td[@data-stat="H"]/text()')[0]
runs = pitcher_row.xpath('.//td[@data-stat="R"]/text()')[0]
bb = pitcher_row.xpath('.//td[@data-stat="BB"]/text()')[0]
so = pitcher_row.xpath('.//td[@data-stat="SO"]/text()')[0]
df.loc[idx] = (names, age, w, l, g, gs, ip, hits, runs, bb, so)