从文件中仅提取每行的第一个单词.. [英] Extract only first word of each line from file..

问题描述

我有一个包含一些内容的文件，我想只显示文件中每行的第一个单词。我试过但没有得到。

===========================

file内容

===========================

你好世界

嗨再次

python编程很棒



================ ==========



代码

=============== ============

I have a file which has some contents and I want to display only first word of each line from file. I tried but not getting.
===========================
file content
===========================
hello world
hi again
python programming is great

==========================

code
===========================

f=open("file1.txt","r+")
content=f.read()
for line in content.split(' ',1):
    print(line)

推荐答案

我不做Python所以我只会显示一些伪代码（详见我的评论）：



- 拆分原始tex将文件放入一个行（字符串）表中。



- 对于每一行（字符串），提取第一个单词（几个方法，来自子字符串（0 ,. 。）正则表达式的方法（更快，imho）。



希望这会有所帮助。

I don't do Python so I will just show some pseudo-code (see my comment for details):

- Split your original text file into a table of lines (strings).

- For each line (string), extract the first word (several methods, from a substring(0,..) method to a regular expression (faster, imho)).

Hope this helps.

而不是阅读所有内容，使用 readline 或 readlines 逐行阅读：https://docs.python.org/2.4/lib/bltin-file-objects.html [ ^ ]。



对于 split（''，1），它取决于你认为的单词。标点符号怎么样？另请参阅： https://docs.python.org/2/library/string.html [< a href =https://docs.python.org/2/library/string.htmltarget =_ blanktitle =New Window> ^ ]。

-SA

Instead of reading all content, read line by line using readline or readlines: https://docs.python.org/2.4/lib/bltin-file-objects.html[^].

As to split(' ', 1), it depends on what you consider a word. How about punctuation characters? See also: https://docs.python.org/2/library/string.html[^].

—SA

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