網絡抓取使用python從網絡下載pdf文件但得到空白文件

Question

我正在嘗試使用 python 從網絡下載 pdf 報告，但是代碼最后返回一個空白的 pdf 報告，我是否知道代碼有什么問題以及我哪里出錯了。

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from BeautifulSoup import BeautifulSoup
import urllib2
import re

html_page = urllib2.urlopen("http://www.imd.gov.in/Welcome%20To%20IMD/Welcome.php")
soup = BeautifulSoup(html_page)
b = soup.findAll('a', attrs={'href': re.compile("^http://hydro.imd.gov.in/hydrometweb/")})
c = b[0]['href']
d = c[0:len(c)-12]

e = d + "PdfReportPage.aspx?ImgUrl=PRODUCTS/Rainfall_Statistics/Cumulative/District_RF_Distribution/DISTRICT_RAINFALL_DISTRIBUTION_COUNTRY_INDIA_cd.PDF"

def download_file(download_url):
    response = urllib2.urlopen(download_url)
    file = open("document.pdf", 'w')
    file.write(response.read())
    file.close()
    print("Completed")

download_file(e) 

Answer 1

使用二進制模式b

前任：

def download_file(download_url):
    response = urllib2.urlopen(download_url)
    with open("document.pdf", 'wb') as outfile:
        outfile.write(response.read())
    print("Completed")

download_file(e)