Python：用标题替换 url

Question

我编写了这段代码来用它们的标题替换 url。它确实会根据需要用标题替换 url，但它会在下一行打印它们的标题。

twfile.txt 包含以下几行：

link1 http://t.co/HvKkwR1c
no link line

输出tw2文件：

link1
Instagram
no link line

但我想以这种形式输出：

link1 Instagram
no link line

我该怎么办？

我的代码：

from bs4 import BeautifulSoup
import urllib

output = open('tw2file.txt','w')

with open('twfile.txt','r') as inputf:
    for line in inputf:
        try:
            list1 = line.split(' ')
            for i in range(len(list1)):

                if "http" in list1[i]:
                    ##print list1[i]
                    response = urllib.urlopen(list1[i])
                    html = response.read()
                    soup = BeautifulSoup(html)
                    list1[i] = soup.html.head.title
                    ##print list1[i]


                    list1[i] = ''.join(ch for ch in list1[i])
                else:
                    list1[i] = ''.join(ch for ch in list1[i])
            line = ' '.join(list1)
            print line
            output.write(line)
        except:
            pass


inputf.close()
output.close()

Answer 1

试试这个代码：（见这里、这里和这里）

from bs4 import BeautifulSoup
import urllib

with open('twfile.txt','r') as inputf, open('tw2file.txt','w') as output:
    for line in inputf:
        try:
            list1 = line.split(' ')
            for i in range(len(list1)):
                if "http" in list1[i]:
                    response = urllib.urlopen(list1[i])
                    html = response.read()
                    soup = BeautifulSoup(html)
                    list1[i] = soup.html.head.title
                    list1[i] = ''.join(ch for ch in list1[i]).strip() # here
                else:
                    list1[i] = ''.join(ch for ch in list1[i]).strip() # here
            line = ' '.join(list1)
            print line
            output.write('{}\n'.format(line))  # here
        except:
            pass

顺便说一句，您使用的是 Python 2.7.x +，两个 opens 在同一个 with 子句中表示。他们的closes 也是不必要的。

Answer 2

关于写入文件的内容

fileobject = open("bar", 'w' )
fileobject.write("Hello, World\n") # newline is inserted by '\n'
fileobject.close()

关于控制台输出

将print line 更改为print line,

Python 在末尾写入 '\n' 字符，除非 print 语句以逗号结尾。