样例代码学习
#!/usr/bin/env python#pyaria2.pyimport os, sys, urllibdef usage(): print """Usage: python tharia2.py URLOPTIONS: As same as options of aria2c"""def get_url_list(url, listpath): if not os.path.exists(listpath): print "Getting URL list, please wait..." f = urllib.urlopen("http://cocobear.info/demo/pythunder/?url=%s" % url) lst = open(listpath, "w+") lst.writelines(f.readlines()) f.close lst.seek(0) else: print "Found existing url list: ", listpath lst = open(listpath) url_list = for line in lst] lst.close() print "Recieved %d url(s)." % len(url_list) return " ".join(url_list)def download(url): for prefix in (r"http://", r"https://", r"ftp://"): if url.startswith(prefix): break else: print "Invalid URL: %s" % url exit() listdir = os.path.expanduser("~/.tharia2/list/") listfile = os.path.split(url)[-1] + ".list" if not os.path.exists(listdir): os.makedirs(listdir) listpath = os.path.join(listdir, listfile) url_list = get_url_list(url, listpath) cmd = " ".join(("aria2c -c", " ".join(sys.argv), url_list)) print "Executing command: %s" % cmd if not os.system(cmd): os.remove(listpath)if __name__ == "__main__": if len(sys.argv) > 1: download(sys.argv[-1]) else: usage()
1，sys.argv[-1]表示获取Lists的最后一个元素，如 names=["1", "2", "3", "4"]
则names[-1]为4，names[:-1]为1，2，3表示从开始到该元素，names[-3, -1]为2，3等
2，sys.argv
3，os
4，file
5，urllib
http://www.kissuki.com/2009/05/python-版-linux-下的迅雷/
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