正则中出现多个贪婪模式

line = "booobooobbbaby123"import reregex_str = ".*(b.*b).*"print(re.match(regex_str, line).group(1))输出：bab慕课网解释满足圆括号的字符串应从源字符串右往左匹配，加上？变为非贪婪模式后从左往右

line = "booobooobbbaby123"import reregex_str = ".*?(b.*b).*"print(re.match(regex_str, line).group(1))输出：booobooobbbab

line = "booobooobbbaby123"import reregex_str = ".*?(b.*?b).*"print(re.match(regex_str, line).group(1))输出：booob