Question

从文件（stringsToTest.txt）获取输入并仅输出字符串回到另一个文件（stringsArePalindromes.txt）。忽略空格，大小写和标点符号

确定字符串是否为回文时，如果是回文，则将原始字符串写入文件

这是我到目前为止所做的：

def ispalindrome(text):
    file=open(str(text),"r")
    a=file.readlines()
    #f=open(str("stringsarepalindromes.txt"),"w")
    for x in a:
        nomorepunc=x.replace("!","")
        nopunc=nomorepunc.replace(".","")
        nospace=nopunc.replace(" ","")
        samecase=(nospace.lower())
        morecase=samecase.replace("?","")
        evencase=morecase.replace("'","")
        cases=evencase.replace(":","")
        #print(cases)
        words=str(cases)
        c=words.split()


        if len(c) < 2:

            print(c,"true")
            #f.write(y)

        if c[0]!= c[-1]:
            print("no")



        return ispalindrome(c[1:-1])
    #open("stringsarepalindromes.txt")"""

Answer 1

删除所有标点符号：

remove = "!.?':,"   # put all characters you want to remove in here

要删除这些字符，并降低字符串中的所有字母，您可以说（x是您的字符串）

x = "".join([i.lower() for i in x if i not in remove])

之后，您只需检查反转的字符串即可测试回文。

x == x[::-1]

Answer 2

这将删除所有标点符号并将回文标记写入新文件：

import string
def ispalindrome(text):
    with open(text) as f,open("output.txt","w") as f1: # use with to open your files to close them automatically
        for line in f:
            test = line.strip().lower().translate(string.maketrans("",""), string.punctuation).replace(" ","") # remove punctuation and whitespace
            if test[::-1] == test: # if the line and line reversed are equal, we have a palindrome
                f1.write(line) # write original line to outfile.txt
            print "Is {} a palindrome? {}".format(test,test[::-1] == test) # just a line to show you what is happening

从文件中选择递归的单词并在另一个文件python中打印出来

2 个答案: