打印列表中每个项目的第一个字母

Question

我正在尝试创建一个程序，该程序在输入“”之前要求输入单词。然后程序将打印出一个句子中的所有单词。然后用每个单词的第一个字母做一个首字母缩略词。我正在使用python。示例如下所示。先谢谢你。很快就要交了。：）

• 我的代码是：

sentence = []

acrostic = []

word = -1

while word:

     sentence.append(word)

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

• 我希望代码执行的操作：

Word: A

Word: cross

Word: tick

Word: is

Word: very

Word: evil

Word: 

A cross tick is very evil

-- ACTIVE

Answer 1

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 2

也许你在找这样的东西：

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 3

输入：

• 在一个循环中，向用户询问一个单词，如果没有，请停止
• 如果是一个单词，请将其保存在sentence中，并将其第一个字母保存在acrostic（word[0]而不是sentence[0]）

对于输出：

• 对于句子，用空格连接单词：" ".join(sentence)
• 对于首字母缩略词，将字母连在一起，不带任何内容："".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