還在爲一張張的點下載圖片而煩惱嗎?請用一個程序員的思路來解決這個問題,下面就是可以節省你大量時間的代碼;
存儲媒體文件有兩種方式:一是隻獲取URL鏈接;二是直接把源文件下載下來
下面這個就是直接把源文件下載下來的實例:
其中,
urlretrieve()函數用於下載文件
代碼如下:
import os
from urllib.request import urlretrieve
from urllib.request import urlopen
from bs4 import BeautifulSoup
downloadDirectory = "D:\downloaded"
baseUrl = "http://pythonscraping.com"
def getAbsoluteURL(baseUrl, source):
if source.startswith("http://www."):
url = "http://" + source[11:]
elif source.startswith("http://"):
url = source
elif source.startswith("www."):
url = source[4:]
url = "http://" + source
else:
url = baseUrl + "/" + source
if baseUrl not in url:
return None
return url
def getDownloadPath(baseUrl, absoluteUrl, downloadDirectory):
path = absoluteUrl.replace("www.", "")
path = path.replace(baseUrl, "")
path = downloadDirectory + path
directory = os.path.dirname(path)
if not os.path.exists(directory):
os.makedirs(directory)
return path
html = urlopen("http://www.pythonscraping.com")
bsObj = BeautifulSoup(html)
downloadList = bsObj.findAll(src=True)
for download in downloadList:
fileUrl = getAbsoluteURL(baseUrl, download["src"])
if fileUrl is not None:
print(fileUrl)
urlretrieve(fileUrl, getDownloadPath(baseUrl, fileUrl, downloadDirectory))
代碼來自《python:網絡爬蟲與信息採取》,感覺有用的話就收藏吧