如何在python中删除非ASCII字符

Question

这是我的代码：

#!C:/Python27/python
# -*- coding: utf-8 -*-
import requests
from bs4 import BeautifulSoup
import urllib2
import sys
import urlparse
import io

url = "http://www.dlib.org/dlib/november14/beel/11beel.html"
#url = "http://eqa.unibo.it/article/view/4554"
#r = requests.get(url)
html = urllib2.urlopen(url)
soup = BeautifulSoup(html, "html.parser")
#soup = BeautifulSoup(r.text,'lxml')

if url.find("http://www.dlib.org") != -1:
    div = soup.find('td', valign='top')
else:
    div = soup.find('div',id='content')

f = open('path/file_name.html', 'w')
f.write(str(div))
f.close()

抓取那些网页，我发现一些非AScii 字符到从该脚本编写的html 文件中，我需要将其删除或解析为可读字符。 有什么建议吗？谢谢

Answer 1

尝试规范化字符串，然后ASCII 对其进行编码，忽略错误。

# -*- coding: utf-8 -*-
from unicodedata import normalize

string = 'úäô§'

if isinstance(string, str):
    string = string.decode('utf-8')

print normalize('NFKD', string).encode('ASCII', 'ignore')
>>> uao

Answer 2

字符为 8 字节 (0-255)，ascii 字符为 7 字节 (0-127)，因此您可以简单地删除 ord 值低于 128 的所有字符

chr 将整数转换为字符，ord 将字符转换为整数。

text = ''.join((c for c in str(div) if ord(c) < 128)

这应该是你的最终代码

#!C:/Python27/python
# -*- coding: utf-8 -*-
import requests
from bs4 import BeautifulSoup
import urllib2
import sys
import urlparse
import io

url = "http://www.dlib.org/dlib/november14/beel/11beel.html"
#url = "http://eqa.unibo.it/article/view/4554"
#r = requests.get(url)
html = urllib2.urlopen(url)
soup = BeautifulSoup(html, "html.parser")
#soup = BeautifulSoup(r.text,'lxml')

if url.find("http://www.dlib.org") != -1:
    div = soup.find('td', valign='top')
else:
    div = soup.find('div',id='content')

f = open('path/file_name.html', 'w')
text = ''.join((c for c in str(div) if ord(c) < 128)
f.write(text)
f.close()

Answer 3

从文本中删除非ASCII 字符。

import string

text = [word for word in text if word not in string.ascii_letters]