Python 如何从字符串中删除 \n 和 \r
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How to remove \n and \r from a string
提问by HittmanA
I currently am trying to get the code from this website: http://netherkingdom.netai.net/pycake.htmlThen I have a python script parse out all code in html div tags, and finally write the text from between the div tags to a file. The problem is it adds a bunch of \r and \n to the file. How can I either avoid this or remove the \r and \n. Here is my code:
我目前正在尝试从这个网站获取代码：http: //netherkingdom.netai.net/pycake.html然后我有一个 python 脚本解析出 html div 标签中的所有代码，最后写出 div 标签之间的文本到一个文件。问题是它在文件中添加了一堆 \r 和 \n 。我怎样才能避免这种情况或删除 \r 和 \n。这是我的代码：
import urllib.request
from html.parser import HTMLParser
import re
page = urllib.request.urlopen('http://netherkingdom.netai.net/pycake.html')
t = page.read()
class MyHTMLParser(HTMLParser):
def handle_data(self, data):
print(data)
f = open('/Users/austinhitt/Desktop/Test.py', 'r')
t = f.read()
f = open('/Users/austinhitt/Desktop/Test.py', 'w')
f.write(t + '\n' + data)
f.close()
parser = MyHTMLParser()
t = t.decode()
parser.feed(t)
And here is the resulting file it makes:
这是它生成的结果文件：
b'
import time as t\r\n
from os import path\r\n
import os\r\n
\r\n
\r\n
\r\n
\r\n
\r\n'
Preferably I would also like to have the beginning b' and last ' removed. I am using Python 3.5.1 on a Mac.
最好我还想删除开头的 b' 和最后一个 '。我在 Mac 上使用 Python 3.5.1。
回答by cdarke
A simple solution is to strip trailing whitespace:
一个简单的解决方案是去除尾随空格：
with open('gash.txt', 'r') as var:
for line in var:
line = line.rstrip()
print(line)
The advantage of rstrip()over using a [:-2]slice is that this is safe for UNIX style files as well.
rstrip()使用[:-2]切片的优点是这对于 UNIX 样式文件也是安全的。
However, if you only want to get rid of \rand they might not be at the end-of-line, then str.replace()is your friend:
但是，如果您只想摆脱\r并且它们可能不在行尾，那么str.replace()您的朋友是：
line = line.replace('\r', '')
If you have a byte object (that's the leading b') the you can convert it to a native Python 3 string using:
如果您有一个字节对象（即前导b'），您可以使用以下方法将其转换为原生 Python 3 字符串：
line = line.decode()
回答by will.fiset
One simple solution is just to strip off the last two characters of each line:
一个简单的解决方案是去掉每行的最后两个字符：
f = open('yourfile')
for line in f.readlines():
line = line[:-2] # Removes last two characters (\r\n)
print(repr(line))
