If you were to create a string variable and initialize it to the empty string by assigning it the value 'foo' * -8, anyone would rightly think you were a bit daft. But it would work. 如果您要创建一个字符串变量并将其赋值为'foo' * -8初始化为空字符串,那么任何人都应该认为您有点傻。
>>> a.split(',') ['1', '2', '3', '4'] 1. 2. 3. 根据多个分隔符分割 >>> line = 'asdf fjdk; afed, fjek,asdf, foo' >>> import re >>> re.split(r'[;,\s]\s*', line)# 用 re 匹配分隔符, ['asdf', 'fjdk', 'afed', 'fjek', 'asdf', 'foo'] 1. 2. 3. ...
load(open('words.pkl','rb'))classes= pickle.load(open('classes.pkl','rb'))defclean_up_sentence(sentence):# tokenize the pattern - splittingwords into arraysentence_words = nltk.word_tokenize(sentence)# stemming every word - reducing tobase formsentence_words = [lemmatizer.lemmatize(word....
('11', '27', '2012') >>> month, day, year = m.groups() >>> >>> # Find all matches (notice splitting into tuples) >>> text 'Today is 11/27/2012. PyCon starts 3/13/2013.' >>> datepat.findall(text) [('11', '27', '2012'), ('3', '13', '2013')] >>> for ...
defclean_up_sentence(sentence):# tokenize the pattern - splittingwords into arraysentence_words = nltk.word_tokenize(sentence)# stemming every word - reducing tobase formsentence_words = [lemmatizer.lemmatize(word.lower()) for word in sentence_words]returnsentence_words# return bag of words ar...
pattern: the regular expression pattern used for splitting the target string. string: The variable pointing to the target string (i.e., the string we want to split). maxsplit: The number of splits you wanted to perform. Ifmaxsplitis 2, at most two splits occur, and the remainder of ...
4ignore_letters = ['!','?',',','.'] 5 6forintentinintents['intents']: 7forpatterninintent['patterns']: 8#tokenize each word 9word = nltk.word_tokenize(pattern) 10words.extend(word) 11#add documents in the corpus 12documents.append((word, intent['tag'])) ...
>>>#Find all matches (notice splitting into tuples)>>>text'Today is 11/27/2012. PyCon starts 3/13/2013.'>>>datepat.findall(text) [('11','27','2012'), ('3','13','2013')]>>>formonth, day, yearindatepat.findall(text): ...
Given a string, write a Python program to split the given string into array of characters.Splitting string into array of charactersYou can follow the following different approaches to split a string into array of characters:By using the loop By converting string to the list...
python-3.x 迭代字符串和caesar同时上下移动的问题如果要使其与数字一起工作，我们需要稍微改进encrypt...