【发布时间】：2014-03-25 01:50:54
【问题描述】：
过去几天我一直在终端中运行以下脚本。我没有对其进行任何更改。以前，它一直运行良好，现在我有错误：
Traceback (most recent call last):
File "GetAlexRanking.py", line 193, in <module>
print("%s:%d" % (p.__class__.__name__, p.get_rank(url
TypeError: %d format: a number is required, not NoneType
这是整个代码。应该可以将其保存在 .py 文件中，使用命令python filename.py www.google.com 从终端 shell 运行它，以打印出一些 Google 的流量统计信息。然而，这将不再适用于我。这里有什么问题？
import struct
import sys
import urllib
import urllib2
import httplib
import re
import xml.etree.ElementTree
class RankProvider(object):
"""Abstract class for obtaining the page rank (popularity)
from a provider such as Google or Alexa.
"""
def __init__(self, host, proxy=None, timeout=30):
"""Keyword arguments:
host -- toolbar host address
proxy -- address of proxy server. Default: None
timeout -- how long to wait for a response from the server.
Default: 30 (seconds)
"""
self._opener = urllib2.build_opener()
if proxy:
self._opener.add_handler(urllib2.ProxyHandler({"http": proxy}))
self._host = host
self._timeout = timeout
def get_rank(self, url):
"""Get the page rank for the specified URL
Keyword arguments:
url -- get page rank for url
"""
raise NotImplementedError("You must override get_rank()")
class AlexaTrafficRank(RankProvider):
""" Get the Alexa Traffic Rank for a URL
"""
def __init__(self, host="xml.alexa.com", proxy=None, timeout=30):
"""Keyword arguments:
host -- toolbar host address: Default: joolbarqueries.google.com
proxy -- address of proxy server (if required). Default: None
timeout -- how long to wait for a response from the server.
Default: 30 (seconds)
"""
super(AlexaTrafficRank, self).__init__(host, proxy, timeout)
def get_rank(self, url):
"""Get the page rank for the specified URL
Keyword arguments:
url -- get page rank for url
"""
query = "http://%s/data?%s" % (self._host, urllib.urlencode((
("cli", 10),
("dat", "nsa"),
("ver", "quirk-searchstatus"),
("uid", "20120730094100"),
("userip", "192.168.0.1"),
("url", url))))
response = self._opener.open(query, timeout=self._timeout)
if response.getcode() == httplib.OK:
data = response.read()
element = xml.etree.ElementTree.fromstring(data)
for e in element.iterfind("SD"):
popularity = e.find("POPULARITY")
if popularity is not None:
return int(popularity.get("TEXT"))
class GooglePageRank(RankProvider):
""" Get the google page rank figure using the toolbar API.
Credits to the author of the WWW::Google::PageRank CPAN package
as I ported that code to Python.
"""
def __init__(self, host="toolbarqueries.google.com", proxy=None, timeout=30):
"""Keyword arguments:
host -- toolbar host address: Default: toolbarqueries.google.com
proxy -- address of proxy server (if required). Default: None
timeout -- how long to wait for a response from the server.
Default: 30 (seconds)
"""
super(GooglePageRank, self).__init__(host, proxy, timeout)
self._opener.addheaders = [("User-agent", "Mozilla/4.0 (compatible; \
GoogleToolbar 2.0.111-big; Windows XP 5.1)")]
def get_rank(self, url):
# calculate the hash which is required as part of the get
# request sent to the toolbarqueries url.
ch = '6' + str(self._compute_ch_new("info:%s" % (url)))
query = "http://%s/tbr?%s" % (self._host, urllib.urlencode((
("client", "navclient-auto"),
("ch", ch),
("ie", "UTF-8"),
("oe", "UTF-8"),
("features", "Rank"),
("q", "info:%s" % (url)))))
response = self._opener.open(query, timeout=self._timeout)
if response.getcode() == httplib.OK:
data = response.read()
match = re.match("Rank_\d+:\d+:(\d+)", data)
if match:
rank = match.group(1)
return int(rank)
@classmethod
def _compute_ch_new(cls, url):
ch = cls._compute_ch(url)
ch = ((ch % 0x0d) & 7) | ((ch / 7) << 2);
return cls._compute_ch(struct.pack("<20L", *(cls._wsub(ch, i * 9) for i in range(20))))
@classmethod
def _compute_ch(cls, url):
url = struct.unpack("%dB" % (len(url)), url)
a = 0x9e3779b9
b = 0x9e3779b9
c = 0xe6359a60
k = 0
length = len(url)
while length >= 12:
a = cls._wadd(a, url[k+0] | (url[k+1] << 8) | (url[k+2] << 16) | (url[k+3] << 24));
b = cls._wadd(b, url[k+4] | (url[k+5] << 8) | (url[k+6] << 16) | (url[k+7] << 24));
c = cls._wadd(c, url[k+8] | (url[k+9] << 8) | (url[k+10] << 16) | (url[k+11] << 24));
a, b, c = cls._mix(a, b, c)
k += 12
length -= 12
c = cls._wadd(c, len(url));
if length > 10: c = cls._wadd(c, url[k+10] << 24)
if length > 9: c = cls._wadd(c, url[k+9] << 16)
if length > 8: c = cls._wadd(c, url[k+8] << 8)
if length > 7: b = cls._wadd(b, url[k+7] << 24)
if length > 6: b = cls._wadd(b, url[k+6] << 16)
if length > 5: b = cls._wadd(b, url[k+5] << 8)
if length > 4: b = cls._wadd(b, url[k+4])
if length > 3: a = cls._wadd(a, url[k+3] << 24)
if length > 2: a = cls._wadd(a, url[k+2] << 16)
if length > 1: a = cls._wadd(a, url[k+1] << 8)
if length > 0: a = cls._wadd(a, url[k])
a, b, c = cls._mix(a, b, c);
# integer is always positive
return c
@classmethod
def _mix(cls, a, b, c):
a = cls._wsub(a, b); a = cls._wsub(a, c); a ^= c >> 13;
b = cls._wsub(b, c); b = cls._wsub(b, a); b ^= (a << 8) % 4294967296;
c = cls._wsub(c, a); c = cls._wsub(c, b); c ^= b >>13;
a = cls._wsub(a, b); a = cls._wsub(a, c); a ^= c >> 12;
b = cls._wsub(b, c); b = cls._wsub(b, a); b ^= (a << 16) % 4294967296;
c = cls._wsub(c, a); c = cls._wsub(c, b); c ^= b >> 5;
a = cls._wsub(a, b); a = cls._wsub(a, c); a ^= c >> 3;
b = cls._wsub(b, c); b = cls._wsub(b, a); b ^= (a << 10) % 4294967296;
c = cls._wsub(c, a); c = cls._wsub(c, b); c ^= b >> 15;
return a, b, c
@staticmethod
def _wadd(a, b):
return (a + b) % 4294967296
@staticmethod
def _wsub(a, b):
return (a - b) % 4294967296
if __name__ == "__main__":
url = sys.argv[1]
providers = (AlexaTrafficRank(), GooglePageRank(),)
print("Traffic stats for: %s" % (url))
for p in providers:
print("%s:%d" % (p.__class__.__name__, p.get_rank(url)))
【问题讨论】：
标签： python windows debugging python-2.7 typeerror