我有一些样本。 我怎么能用空洞取代这种扼杀的首例发生?
regex = re.compile( text )
match = regex.match(url)
if match:
url = url.replace(regex, )
string replace(功能完全解决这一问题:
扼杀.replace(s, age, new[, maxreplace])
用新版取代所有代人种的血迹。 如果提出任择论点,则将取代第一种最大事件。
>>> u longlongTESTstringTEST .replace( TEST , ? , 1)
u longlong?stringTEST
http://docs.python.org/library/re.html#re.sub"rel=“noreferer”>re.sub 本条允许你直接指明<代码>count:
regex.sub( , url, 1)
(注:辩论次序为replacement,original,不是相反的,如有可能。)
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