如何在Python中访问多行变量的第n行

Question

给定一个多行变量

var="""this is line 1
this is line 2
this is line 3
this is line 4"""

我该如何将特定行，比如第2行，赋值给变量？

- g2504486.nwytg.com

---

可能与如何将多行字符串拆分成多行？重复。 - Georgy

Answer 1

>>> var="""this is line 1
... this is line 2
... this is line 3
... this is line 4"""
>>> 
>>> line3 = var.splitlines()[3 - 1]
>>> line3
'this is line 3'

str.splitlines将您的多行字符串拆分为不同的行。第n行将位于索引n - 1.

- timgeb

Answer 2

在n行之间，您将有n-1个换行符。假设您有3行，则有2个换行符。

multiple_lines ="""this is line 1
... this is line 2
... this is line 3
... this is line 4"""
ans=multiple_lines.split(“\n”)[m-1]

假设您想从多个字符串中获取第m个字符串。由于索引从0开始，因此您需要使用m-1来访问第m个字符串，例如如果您想要访问第3个元素，则需要使用ans[2]。

- Raman Mishra

Answer 3

你可以尝试使用"\n"字符进行分割，就像这样

>>> a = """this is line1
... this is line2
... this is line3"""
>>> a
'this is line1\nthis is line2\nthis is line3'
>>> a.split("\n")[1]
'this is line2'

- FlorentY