打印出列表中每个项目的首字母

Question

我正在尝试创建一个程序，要求输入单词，直到输入“”。然后，程序将打印出一个句子中连接的所有单词。然后取每个单词的第一个字母来做一个离合词。我正在使用python。示例如下所示。提前感谢您。这很快就会到期。:)我编码的内容：sentence = []acrostic = []word = -1while word:     sentence.append(word)      acrostic.append(sentence[0].upper())print(sentence)print("-- {}".format(acrostic))我希望代码做什么：Word: AWord: crossWord: tickWord: isWord: veryWord: evilWord: A cross tick is very evil-- ACTIVE

Answer 1

对于输入：

• 在循环中，问用户一个单词，如果没有什么就停止

• 如果它是一个单词，请将其保存为第一个字母（不是sentenceacrosticword[0]sentence[0])

对于输出：

• 对于句子，用空格连接单词：" ".join(sentence)

• 对于离合词，将字母与任何东西连接在一起："".join(acrostic)

sentence = []

acrostic = []

while True:

    word = input('Please enter a word, or enter to stop : ')

    if not word:

        break

    sentence.append(word)

    acrostic.append(word[0].upper())

print(" ".join(sentence))

print("-- {}".format("".join(acrostic)))

给

Please enter a word, or " to stop : A

Please enter a word, or " to stop : cross

Please enter a word, or " to stop : tick

Please enter a word, or " to stop : is

Please enter a word, or " to stop : very

Please enter a word, or " to stop : evil

Please enter a word, or " to stop : 

A cross tick is very evil

-- ACTIVE

Answer 2

python 3.8 或更高版本

sentence = []

acrostic = []

while user_input := input('word: '):

    sentence.append(user_input)

    acrostic.append(user_input[0].upper())

print(' '.join(sentence))

print(f"-- {''.join(acrostic)}")

输出：

word: A

word: cross

word: tick

word: is

word: very

word: evil

word: 

A cross tick is very evil

-- ACTIVE

python 3.6 和 3.7

sentence = []

acrostic = []

while True:

    user_input = input('word: ')

    if not user_input:

        break

    sentence.append(user_input)

    acrostic.append(user_input[0].upper())

print(' '.join(sentence))

print(f"-- {''.join(acrostic)}")

python 3.5 或更早版本

sentence = []

acrostic = []

while True:

    user_input = input('word: ')

    if not user_input:

        break

    sentence.append(user_input)

    acrostic.append(user_input[0].upper())

print(' '.join(sentence))

print('-- {}'.format(''.join(acrostic)))

Answer 3

也许你正在寻找这样的东西：

sentence = []

acrostic = []

word = -1

while word != "":

    word = input("Word: ")

    if word:

        sentence.append(word)

        acrostic.append(word[0].upper())

print(" ".join(sentence))

print("-- {}".format("".join(acrostic)))

Answer 4

虽然每个人都有基本循环的覆盖，但这是一个使用迭代器（可调用，sentinel）模式的不错示例：

def initial():

    return input('Word: ')[:1]

print('-- ' + ''.join(iter(initial, '')))

将产生：

Word: A

Word: cross

Word: tick

Word: is

Word: very

Word: evil

Word: 

-- Active