我有一个文本文件,只有一行有10.000个单词。 现在我想在特定单词(“Comment”)出现之前添加换行符,我还想在新的文本文件中写这个:
文本文件看起来像:“评论:是的,你是对的评论:这是非常有趣的评论:真的吗?
新文件应如下所示:
Comment: Yeah, you're right
Comment: That's very interesting
Comment: really?
我在下面尝试了这段代码,但是出了点问题。我是初学者,到现在为止,我无法找到解决方案。谢谢你的帮助
-*- coding: utf-8 -*-
d = file('test.txt','r')
text=d.read()
e = file('output.txt','w')
x=raw_input("Insert word:")
# -> Comment
for line in d.readlines():
if line.startswith(x):
word.append(+"\n")
e.write()
e.close()
d.close()
答案 0 :(得分:5)
你只需要使用str.replace:
e.write(d.read().replace(' Comment:', '\nComment:'))
答案 1 :(得分:1)
以下是对错误的解释:
d = file('test.txt','r')
text=d.read() # Ok: now 'text' contains the entire file contents.
e = file('output.txt','w')
x=raw_input("Insert word:")
# -> Comment
for line in d.readlines(): # You already read the whole file, so
# this loop can't read any more. But even without that, your input
# file only contains one line, so this would only loop once.
if line.startswith(x): # You are trying to look for a word at the
# beginning of each line, in order to determine where to put the
# line breaks. But the words can't be found at the beginnings of
# all the lines until those lines exist, i.e. after the line
# breaks have been positioned.
word.append(+"\n") # This makes no sense at all. You can't
# '.append' to 'word' because there is no 'word' defined yet,
# and '+"\n"' is trying to treat a string like a number. Yes,
# you can use '+' to join two strings, but then you need one
# on either side of the '+'. 1 + 1, "hi " + "mom".
e.write() # If you want to write something to the file, you have
# to specify what should be written.
e.close() # If the loop *did* actually execute multiple times,
d.close() # then you definitely wouldn't want to close the files
# until after the loop is done.
其他答案解释了如何正确解决问题。我们将文件读入一个字符串,并在每个单词出现之前添加一个换行符。这相当于用(换行符,后跟单词)替换单词的每个外观。该功能是内置的。然后我们将修改后的字符串写入输出文件。
答案 2 :(得分:0)
一个非常简单的解决方案可能是:
for line in d.readlines():
e.write(line.replace("Comment:", "\nComment:"))
e.close()
答案 3 :(得分:0)
你可以'\n'.join(x+': '+string for string in line.split(x+': '))