我如何让这行代码打印出问候语，不包括一些字符

Question

#This is my string known as "greeting".

greeting = "hello how are you, what?" 

#This prints the greeting the normal way.

print(greeting.title())

#This prints the greeting backwards and excluding the chosen letter "h" on the outside.  

print (greeting.title()[:greeting.find("h"):-1] + greeting[greeting.rfind("h")-1:5])

我如何打印出问候语，不包括外部字母“h”，但将内部字母“h”保留在原处。

我需要 output 为：

"Hello How Are You, What?"

"W ,uoY erA woH olle"

我当前的代码 output 是：

"Hello How Are You, What?"

"?tahW ,uoY erA woH olle"

我只需要'?tah' 消失。

Answer 1

greeting = "hello how are you, what?"
title = greeting.title()
print(title)
print(title[greeting.rfind('h') - 1:greeting.find('h'):-1])

这输出：

Hello How Are You, What?
W ,uoY erA woH olle

演示： https://replit.com/@blhsing/UnknownMustyFlatassembler

Answer 2

正则表达式是实现这一目标的另一种方式。

>>> import re
>>> greeting = "hello how are you, what?"
>>> re.sub(r'^[hH](.*)[hH].*?$', r'\1', greeting.title())[::-1]
'W ,uoY erA woH olle'

我们将匹配字符串中h或H与最后一个h或H之间的所有内容，并用它替换整个字符串，然后用[::-1]反转它。