Python 字符串“in”运算符

Question

txt = "The rain in Spain stays mainly in the plain"x = "ain" in txtprint(x) // Truetxt = "The rain in Spain stays mainly in the plain "x = " " in txtprint(x) // Truetxt = "The rain in Spain stays mainly in the plain "x = " " in txt.strip()print(x) // True ,即使在删除空格之后，它也是真实的。

Answer 1

strip()仅删除前导和尾随空格，而不是字符串中的所有空格。

Answer 2

txt.replace(" ", "")这将删除所有空格。

如果您还想删除其他空格，

txt = "".join(txt.split())

Answer 3

txt = "The rain in Spain stays mainly in the plain "

txt.strip()

输出：

'The rain in Spain stays mainly in the plain'

stript()只是删除开头和结尾的空格，而不是字符串之间的空格。因此，以下陈述是正确的：

x = " " in txt.strip()

print(x)

输出：

True

有很多方法可以删除字符串中的所有空格：

1.split()

''.join(txt.split())

2.replace()

txt.replace(" ", "")

3、正则表达式：

import re

stringWithoutSpaces = re.sub(r"\s+", "", txt, flags=re.UNICODE)

所有这些的输出是：

'TheraininSpainstaysmainlyintheplain'

Answer 4

strip() 删除前导字符和尾随字符。意味着文本看起来像这样

“西班牙的雨主要停留在平原”

但单词之间仍然有空格