table = str.maketrans({key: None for key in string.punctuation}) new_s = s.translate(table) # Output: string without punctuation 1. 2. 3. 4. 小纸条:你不需要理解做一dict键映射到给定的dictof a None;{key: None for key in string.punctuation}可以取代这是一个dict.fromkeys(string.punctuati...
Python中的string.punctuation模块包含所有标点符号的常量,可以在代码中使用它来删除字符串中的标点符号。以下是一个示例代码: import string def remove_punctuation(text): """ This function removes all punctuation from a given text """ translator = str.maketrans('', '', string.punctuation) return text....
hexdigits -- a string containing all characters considered hexadecimal digits octdigits -- a string containing all characters considered octal digits punctuation -- a string containing all characters considered punctuation printable -- a string containing all characters considered printable """ # Some s...
``` # Python script to generate random text import random import string def generate_random_text(length): letters = string.ascii_letters + string.digits + string.punctuation random_text = ''.join(random.choice(letters) for i in range(length)) return random_text ``` 说明: 此Python脚本生成...
Method 1: Python remove multiple characters from string using String slicing String slicingin Python allows us to extract parts of a string based on indices. The string slicing syntax in Python is: string[start:stop:step] NameDescription
#从文本数据中使用TF-IDF矢量器提取前5000个最重要的特征tfidf = TfidfVectorizer(max_features = 5000)#使用主成分分析进行降维fromsklearn.decompositionimportPCA NUM_COMPONENTS= 5000#特征总数pca =PCA(NUM_COMPONENTS) reduced= pca.fit(scaled_X_train) ...
string.lowercase 小写字母的字符串’abcdefghijklmnopqrstuvwxyz’ string.octdigits 字符串’01234567’ string.punctuation 所有标点字符 string.printable 可打印的字符的字符串。包含数字、字母、标点符号和空格 string.uppercase 大学字母的字符串’ABCDEFGHIJKLMNOPQRSTUVWXYZ’ string.whitespace 空白字符 ‘\t\n\x0b...
``` # Python script to generate random text import random import string def generate_random_text(length): letters = string.ascii_letters + string.digits + string.punctuation random_text = ''.join(random.choice(letters) for i in range(length)) return random_text ``` 说明: 此Python脚本生成...
# remove punctuation from each token desc = [w.translate(table) for w in desc] # remove hanging 's' and 'a' desc = [word for word in desc if len(word)> 1 ] # remove tokens with numbers in them desc = [word for word in desc if word.isalpha()] # store as string desc_...
将String 变量转换为 float、int 或 boolean 向字符串填充或添加零的不同方法 去掉字符串中的 space 字符 生成N个字符的随机字符串 以不同的方式反转字符串 将Camel Case 转换为 Snake Case 并更改给定字符串中特定字符的大小写 检查给定的字符串是否是 Python 中的回文字符串 ...