检查给定字符串是否为元音回文的Python程序

给定一个字符串（可能同时包含元音和辅音字母），删除所有辅音，然后检查结果字符串是否为回文。

例子：

Input :  abcuhuvmnba
Output : YES
Explanation :
The consonants in the string "abcuhuvmnba"
are removed. Now the string becomes "auua".

Input : xayzuezyax
Output : NO

Input : bkldhgcj
Output : -1

方法：
删除字符串中的所有辅音。检查元音字符串是否是回文。如果是回文则打印 YES，否则打印 NO。如果字符串不包含元音，则打印 -1。

下面是Python的实现：

# Python program to check if given 
# string is vowel Palindrome
  
# Function to check if a given string is a vowel
def vowel(c):
      
    # creating a list of vowels
    v = list("aeiou")
      
    # if the character is a vowel return True
    if c in v: return True
    return False
  
# Function to check if a vowel
# string is palindrome
def palindrome(s):
      
    # create a empty list
    v = []
      
    # append all vowels into the list
    for i in s:
        if vowel(i):v.append(i)
      
    # if the length of the vowel
    # string is 0 then print -1
    if len(v)== 0: print("-1")
      
    # else check if it is a palindrome
    else:
        # create a reversed string
        x = v[::-1]
          
        # initialize a flag
        f = 1
        for i in range(len(x)):
              
            # if the characters are not the same 
            if x[i]!= v[i]:
                  
                # set the flag to 0
                f = 0
                break
                  
        if f == 1: print("YES")
        else: print("NO")
          
# Driver Code
s = 'abcuhuvmnba'
  
# calling the main function
palindrome(s.strip())

输出：

YES