将段落中每个句子的第一个单词的第一个字母小写

Question

如何将段落中每个句子的第一个单词的首字母小写？此外，句子中间的名词将保持大写。

我怎样才能在 Python 中做到这一点？

例如：“这是一个例句。请帮帮我。我不想要这种情况。在柏林我们玩得很开心。”到“这是一个例句。请帮助我。我不想要这种情况。在柏林我们玩得很开心。”

我试过这个，但这只是一个较低的句子。

Answer 1

我会为此使用正则表达式：

import re

s = "This is a example sentence. Please help me. I don't want this situation. In Berlin we have a great time."

out = re.sub(r'((?:^|.)s*w+)', lambda m: m.group().lower(), s)

输出："this is a example sentence. please help me. i don't want this situation. in Berlin we have a great time."

regex demo

Answer 2

代码：

def first_lower(s):
    paragraph = ''
    _sentences = s.split('.') # split sentences from paragraph using .
    for sentence in _sentences:
        if sentence == '':
            continue
        paragraph += sentence[0].lower() + sentence[1:] + '.' # append converted string to paragraph
    
    return paragraph

string = """this is a example sentence. please help me. i don't want this situation. in Berlin we have a great time."""
print(first_lower(string))

输出：

这是一个例句。请帮我。我不想要这种情况。在柏林，我们玩得很开心。