Python - 用特定字符K 替换字符串中的元音

给定一个字符串，用字符K 替换所有元音。

Input : test_str = “Geeks for Geeks”; K=’#’
Output : “G##ks f#r G##ks” 
Explanation : All the vowels in test_str are replaced by a give particular character.

Input : test_list = “GFG”; K=”$”
Output : GFG
Explanation : As test_str contained no vowel, so the same string is returned.

方法#1：使用循环+replace()

最初创建字符串元音，然后遍历给定的test_str ， 在test_str中检测元音时，使用replace()方法将元音替换为K。

Python3

# Function to Replace each vowel in
# the string with a specified character
def replaceVowelsWithK(test_str, K):
 
    # string of vowels
    vowels = 'AEIOUaeiou'
 
    # iterating to check vowels in string
    for ele in vowels:
 
        # replacing vowel with the specified character
        test_str = test_str.replace(ele, K)
 
    return test_str
 
 
   
# Driver Code
# input string
input_str = "Geeks for Geeks"
 
# specified character
K = "#"
 
# printing input
print("Given Sting:", input_str)
print("Given Specified Character:", K)
 
# printing output
print("After replacing vowels with the specified character:",
      replaceVowelsWithK(input_str, K))

输出

Given Sting: Geeks for Geeks
Given Specified Character: #
After replacing vowels with the specified character: G##ks f#r G##ks

输出：

Given Sting: Geeks for Geeks 
Given Specified Character: # 
Afer replacing vowels with the specified character: G##ks f#r G##ks

方法#2：使用嵌套循环

在这里，我们首先将给定的字符串转换为一个列表，然后创建一个元音列表和一个空列表，即new_string 。在比较string_list 和元音列表的元素之后，如果元素是元音，则将K附加到new_string否则附加给定字符串的元素。  

蟒蛇3

# Function to Replace each vowel
# in the string with a specified character
def replaceVowelsWithK(test_str, K):
 
    # creating list of vowels
    vowels_list = ['A', 'E', 'I', 'O', 'U', 'a', 'e', 'i', 'o', 'u']
 
    # creating empty list
    new_string = []
 
    # converting the given string to list
    string_list = list(test_str)
 
    # running 1st iteration for
    # comparing all the
    # characters of string with
    # the vowel characters
    for char in string_list:
 
        # running 2nd iteration for
        # comparing all the characters
        # of vowels with the string character
        for char2 in vowels_list:
 
            # comparing string character
            # and vowel character
            if char == char2:
 
                # if condition is true then adding
                # the specific character entered
                # by the user in the new list
                new_string.append(K)
                break
 
        # else adding the character
        else:
            new_string.append(char)
 
    # return the converted list into string
    return(''.join(new_string))
 
   
 
# Driver Code
# input string
input_str = "Geeks for Geeks"
 
# specified character
K = "#"
 
# printing input
print("Given Sting:", input_str)
print("Given Specified Character:", K)
 
# printing output
print("After replacing vowels with the specified character:",
      replaceVowelsWithK(input_str, K))

输出

Given Sting: Geeks for Geeks
Given Specified Character: #
After replacing vowels with the specified character: G##ks f#r G##ks