我有 python 燒瓶項(xiàng)目（程序），我將用戶輸入的帶有大寫字母和標(biāo)點(diǎn)符號的字符串轉(zhuǎn)換為沒有它們的字符串。當(dāng)我運(yùn)行程序時(shí)，我收到以下錯(cuò)誤：ValueError: translation table must be 256 characters long Traceback (most recent call last) File:"/home/sd18656/.local/lib/python2.7/site-packages/flask/app.py", line2463, in __call__ return self.wsgi_app(environ, start_response) File"/home/sd18656/.local/lib/python2.7/site-packages/flask/app.py", line2449, in wsgi_app response = self.handle_exception(e) File"/home/sd18656/.local/lib/python2.7/site-packages/flask/app.py", line1866, in handle_exception reraise(exc_type, exc_value, tb) File"/home/sd18656/.local/lib/python2.7/site-packages/flask/app.py", line2446, in wsgi_app response = self.full_dispatch_request() File"/home/sd18656/.local/lib/python2.7/site-packages/flask/app.py", line1951, in full_dispatch_request rv = self.handle_user_exception(e) File"/home/sd18656/.local/lib/python2.7/site-packages/flask/app.py", line1820, in handle_user_exception reraise(exc_type, exc_value, tb) File"/home/sd18656/.local/lib/python2.7/site-packages/flask/app.py", line1949, in full_dispatch_request rv = self.dispatch_request() File"/home/sd18656/.local/lib/python2.7/site-packages/flask/app.py", line1935, in dispatch_request returnself.view_functions[rule.endpoint](**req.view_args) File"/home/sd18656/FlaskProject/mainapp.py", line 61, in home score,total_processed_data = get_score(abstract) File"/home/sd18656/FlaskProject/mainapp.py", line 32, in get_scoreabstract = abstract.translate(string.punctuation).lower()在程序中，abstract 是一個(gè)字符串類型。我遇到了這個(gè)解決方案：string.translate 函數(shù)中的“表”是什么意思？但是，對于該錯(cuò)誤，orstring.maketrans似乎并不順利。我該如何解決這個(gè)問題？lower()upper()
1 回答
三國紛爭
TA貢獻(xiàn)1804條經(jīng)驗(yàn) 獲得超7個(gè)贊
您需要將轉(zhuǎn)換表傳遞給str.translate（string.translate在 Python 2 中）。翻譯表無非是一個(gè)dictwherekey是搜索字符并且value是替換字符， wherekey和value是ord()各個(gè)字符的 the。
例如，如果您想punctuation用空格替換所有字符，請執(zhí)行以下操作：
from string import punctuation
transtable = string.maketrans(punctuation, ' ' * len(punctuation))
abstract = abstract.translate(transtable).lower()
這是一個(gè)概念證明：
>>> from string import punctuation
>>> transtable = string.maketrans(punctuation, ' ' * len(punctuation))
>>> type(transtable)
<class 'dict'>
>>> 'This!is#a.string,with;punctuations:'.translate(transtable).lower()
'this is a string with punctuations '
>>>
這是maketrans和的另一個(gè)用法示例translate（只是為了好玩）：
>>> elite = string.maketrans('aeiou', '4310v')
>>> 'Hackers Rulez'.translate(elite)
'H4ck3rs Rvl3z'
>>>
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