打印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“”为止。然后，程序将打印出连接在句子中的所有单词。然后，将每个单词的第一个字母设为反义词。我正在使用python。示例如下所示。先感谢您。这是真的要到期了。 ：）

• 我编写的代码：

sentence = []

acrostic = []

word = -1

while word:

     sentence.append(word)

      acrostic.append(sentence[0].upper())
print(sentence)
print("-- {}".format(acrostic))

• 我想要代码做什么：

Word: A

Word: cross

Word: tick

Word: is

Word: very

Word: evil

Word: 

A cross tick is very evil

-- ACTIVE

Answer 1

输入：

• 在一个循环中，向用户询问一个单词，如果没有什么可以停止的
• 如果是单词，请将其保存在sentence中，并将其保存为acrostic的第一个字母（word[0]而不是sentence[0]）

对于输出：

• 该句子的各个单词之间加一个空格：" ".join(sentence)
• 对于杂技演员，不加任何字母："".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)))

给予

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

55

输出：

sentence = []
acrostic = []
while user_input := input('word: '):
    sentence.append(user_input)
    acrostic.append(user_input[0].upper())

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

python 3.6和3.7

word: A
word: cross
word: tick
word: is
word: very
word: evil
word: 
A cross tick is very evil
-- ACTIVE

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

Answer 3

也许您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

目标：提取每个单词的第一个字母，直到输入``''。

acrostic = ""
sentence = ""
while(True):
    word = input("enter a word= ")
    if(word!=''):
        acrostic+=word[0].upper()
        sentence+=word+" " 
    else:
        break
print(sentence)
print(acrostic)

使用您的示例输入；

enter a word= A
enter a word= cross
enter a word= tick
enter a word= is
enter a word= very
enter a word= evil
enter a word= 

输出

A cross tick is very evil
ACTIVE

Answer 5

虽然每个人都涵盖了基本的循环，但这是使用iter(callable, sentinel)模式的一个很好的例子：

def initial():
    return input('Word: ')[:1]

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

会产生：

Word: A
Word: cross
Word: tick
Word: is
Word: very
Word: evil
Word: 
-- Active