Take this text for example 泣（な）き出（だ）した, I want to remove the furigana programmatically (ie. 泣き出した). I tried
re.sub(r"\（[^()]*\）", "", '泣（な）き出（だ）した')
but it returns 泣した instead. What is the better regular expression?
You should try
re.sub(r"\（.*?\）", "", '泣（な）き出（だ）した'), which uses the non-greedy quantifier *?.