根据数组的长度在 Pandas 中添加列？

Question

给定一个句子“你好。我正在写一个问题”，我想在标点符号上拆分句子并将每个子句添加到 Pandas 中的单独列中，例如：

dummy = ['Hello', 'I am writing a question']
pd.DataFrame(dummy).T

并且我希望迭代地执行此操作，例如：

for subsentence in sentence:
    subsentence = re.split(r'[.|,|?|!]', str(subsentence))
    df['item'] = subsentence

但这确实会产生：

Answer 1

将列表推导与展平一起使用：

sentence = ["Hello. I am writing a question", "Hello. I am writing a question"]

L = [x for subsentence in sentence for x in re.split(r'[.|,|?|!]', str(subsentence))]

df = pd.DataFrame({'item':L})
print (df)
                       item
0                     Hello
1   I am writing a question
2                     Hello
3   I am writing a question