Python - write()与writelines()和连接的字符串 [英] Python - write() versus writelines() and concatenated strings

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问题描述

所以我正在学习Python。我正在经历教训,遇到了一个问题,我必须将大量 target.write()压缩成一个 write(),而在每个用户输入变量( write()\\\


我想出了:

  nl =\\\

lines = line1,nl,line2,nl,line3,nl
textdoc.writelines(lines)

如果我尝试这样做:

$ p $ textdoc.write(lines)

我得到一个错误。但是,如果我输入:

  textdoc.write(line1 +\ n+ line2 + ....)

然后工作正常。为什么我无法在 write()中为换行使用字符串,但是我可以在 writelines()

Python 2.7
当我搜索到Google搜索到的大部分资源时,我发现它们是我的头,我仍然是一个非专业人士。

b $ b

解决方案

writelines 需要一个字符串列表,而 write code>需要一个字符串。


$ b

line1 +\ n+ line2 在将字符串传递给 write



请注意,如果您有很多行,可能需要使用 \\ n.join(list_of_lines)


So I'm learning Python. I am going through the lessons and ran into a problem where I had to condense a great many target.write() into a single write(), while having a "\n" between each user input variable(the object of write()).

I came up with:

nl = "\n"
lines = line1, nl, line2, nl, line3, nl
textdoc.writelines(lines)

If I try to do:

textdoc.write(lines)

I get an error. But if I type:

textdoc.write(line1 + "\n" + line2 + ....)

Then it works fine. Why am I unable to use a string for a newline in write() but I can use it in writelines()?

Python 2.7 When I searched google most resources I found were way over my head, I'm still a lay-people.

解决方案

writelines expects a list of strings, while write expects a single string.

line1 + "\n" + line2 merges those strings together into a single string before passing it to write.

Note that if you have many lines, you may want to use "\n".join(list_of_lines).

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