如何打印出只打印出包含某些字母的列表中的元素？

Question

我正在一个项目上，我想编写一个代码，该代码将查找句子中仅包含某些字母的单词，然后将其返回（打印出来）。

sentence = "I am asking a question on Stack Overflow"
lst = []

# this gives me a list of all words in a sentence
change = sentence.split()

# NOTE: I know this isn't correct syntax, but that's basically what I want to do.
lst.append(only words containing "a")
print(lst)

现在，我正在苦苦挣扎的部分是，例如，如何仅附加包含字母“ a”的单词？

Answer 1

您可以这样操作：

words = sentence.split()
lst = [word for word in words if 'a' in word]
print(lst)
# ['am', 'asking', 'a', 'Stack']

Answer 2

尝试这个！ 我希望它是很好的理解！

sentence = "I am asking a question on Stack Overflow"
lst = []

change = sentence.split()
#we are going to check in every word of the sentence, if letter 'a' is in it.
for a in change:
    if 'a' in a:
        print(a+" has an a! ")
        lst.append(a)
print(lst)

这将输出：

['am', 'asking', 'a', 'Stack']