删除Python中的空格不起作用

Question

我想删除空格。我尝试过以前的线程，包括re.sub

码：

wordinput = (input("Input:\n"))
wordinput = wordinput.lower()
cleanword = wordinput.replace(" ","")
cleanword = wordinput.replace(",","")
cleanword = wordinput.replace(".","")
revword = cleanword [::-1]
print(cleanword)
print(revword)
print("Output:")
if (cleanword == revword):
    print('"The word ' + wordinput + ' is a palindrome!"')
else:
    print('"Unfortunately the word ' + wordinput + ' is not a palindrome. :(')

输出：

Input:
mr owl ate my metal worm 
mr owl ate my metal worm
mrow latem ym eta lwo rm
Output:
"Unfortunately the word mr owl ate my metal worm is not a palindrome. :(

Answer 1

你尝试过这样的事情：

import re
cleanword = re.sub(r'\W+', '', wordinput.lower())

Answer 2

你遇到的问题是：

cleanword = wordinput.replace(" ","")
cleanword = wordinput.replace(",","")
cleanword = wordinput.replace(".","")

您没有保存先前替换的结果。

尝试：

cleanword = wordinput.replace(" ", "").replace(",", "").replace(".", "")

Answer 3

@StephenRauch explains你的问题很好。

但这是实现逻辑的更好方法：

chars = ',. '
wordinput = 'mr owl ate my metal worm '
cleanword = wordinput.translate(dict.fromkeys(map(ord, chars)))

# 'mrowlatemymetalworm'

Answer 4

wordinput = (input("Input:\n"))
cleanword=''.join([e for e in wordinput.lower() if e not in ", ."])

你可以尝试这种理解

Answer 5

也许你应该尝试这个：

wordinput = raw_input("Input:\n")

cleanword =''.join([x for x in wordinput.lower() if x not in (',','.',' ')])

if cleanword[:] == cleanword[::-1]:

    print ('"The word ' + wordinput + ' is a palindrome!"')

else:
    print ('"The word ' + wordinput + ' is not a palindrome!"')

Answer 6

首次替换后，在后续替换时，您需要使用cleanword，这是更新的字符串而不是wordinput。您可以尝试以下方法：

wordinput = (input("Input:\n"))
wordinput = wordinput.lower()
cleanword = wordinput.replace(" ","")

# updating 'cleanword' and saving it 
cleanword = cleanword.replace(",","")
cleanword = cleanword.replace(".","")

revword = cleanword [::-1]
print(cleanword)
print(revword)
print("Output:")

if (cleanword == revword):
    print('"The word ' + wordinput + ' is a palindrome!"')
else:
    print('"Unfortunately the word ' + wordinput + ' is not a palindrome. :(')