python单词反转

以下是三种用Python进行单词反转的方法：

方法一：使用split()和join()函数

def reverse_words(str):
    words = str.split(' ')
    reversed_words = [word[::-1] for word in words]
    reversed_str = ' '.join(reversed_words)
    return reversed_str

sentence = "Hello World"
reversed_sentence = reverse_words(sentence)
print(reversed_sentence)  # 输出：olleH dlroW

方法二：使用reversed()函数

def reverse_words(str):
    words = str.split(' ')
    reversed_words = [word[::-1] for word in words]
    reversed_str = ' '.join(reversed(reversed_words))
    return reversed_str

sentence = "Hello World"
reversed_sentence = reverse_words(sentence)
print(reversed_sentence)  # 输出：olleH dlroW

方法三：使用while循环

def reverse_words(str):
    words = str.split(' ')
    reversed_words = []
    i = len(words) - 1
    while i >= 0:
        reversed_words.append(words[i][::-1])
        i -= 1
    reversed_str = ' '.join(reversed_words)
    return reversed_str

sentence = "Hello World"
reversed_sentence = reverse_words(sentence)
print(reversed_sentence)  # 输出：olleH dlroW