先给出结论:
replace()
方法进行替换,效率非常高;replace()
进行替换。可行的方法:
1. 链式replace()
string.replace().replace()
1.x 在for
循环中调用replace()
「在要替换的字符较多时」
2. 使用string.maketrans
3. 先 re.compile 然后 re.sub
……
def a(text): chars = "" for c in chars: text = text.replace(c, "//" + c)def b(text): for ch in ['&','#']: if ch in text: text = text.replace(ch,"//"+ch)import redef c(text): rx = re.compile('([])') text = rx.sub(r'///1', text)RX = re.compile('([])')def d(text): text = RX.sub(r'///1', text)def mk_esc(esc_chars): return lambda s: ''.join(['//' + c if c in esc_chars else c for c in s])esc = mk_esc('')def e(text): esc(text)def f(text): text = text.replace('&', '/&').replace('#', '/#')def g(text): replacements = {"&": "/&", "#": "/#"} text = "".join([replacements.get(c, c) for c in text])def h(text): text = text.replace('&', r'/&') text = text.replace('#', r'/#')def i(text): text = text.replace('&', r'/&').replace('#', r'/#')
参考链接:
http://stackoverflow.com/questions/3411771/multiple-character-replace-with-python
http://stackoverflow.com/questions/6116978/python-replace-multiple-strings
http://stackoverflow.com/questions/8687018/python-string-replace-two-things-at-once
http://stackoverflow.com/questions/28775049/most-efficient-way-to-replace-multiple-characters-in-a-string
总结
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