在进行字符串处理和文本分析时，有时我们需要从字符串列表中删除特殊字符。特殊字符可能是空格、标点符号...
join(filtered_tokens) return filtered_text # 将文本规范化函数组合形成流水线 def normalize_corpus(corpus,tokenize = False): normalized_corpus = [] for text in corpus: text = expand_contractions(text,CONTRACTION_MAP) text = lemmatize_text(text) text = remove_special_characters(text) text = ...
首先我们来了解正则表达式的精确匹配和模糊匹配,其中模糊匹配又包括匹配符号(Matching Characters)和特殊序列(Special Sequence)。 精确匹配 精确匹配很好理解,即明文给出我们想要匹配的模式,比如上面讲到的在思科24口的2960交换机里查找up的端口,我们就在管道符号|后面明文给出模式'up',又比如我们想在下面的交换机日志...
5. Stripping Characters If you want to remove characters from the beginning or end of a string, then you can use some methods like strip(), lstrip(), or rstrip(). Example: Python 1 2 3 4 5 6 7 8 # Create a string Text = "$$$Intellipaat$$$" # Stripping all '$' characters...
strip([chars]) -> string or unicode Return a copy of the string S with leading and trailing whitespace removed. If chars is given and not None, remove characters in chars instead. If chars is unicode, S will be converted to unicode before stripping """ return "" def swapcase(self): ...
The split() function divides a typical command into the different tokens needed. The shlex module can come in handy when it may be not obvious how to divide up more complex commands that have special characters, like spaces:Python >>> shlex.split("echo 'Hello, World!'") ['echo', '...
strip() # Strips all whitespace characters from both ends. <str> = <str>.strip('<chars>') # Strips passed characters. Also lstrip/rstrip(). <list> = <str>.split() # Splits on one or more whitespace characters. <list> = <str>.split(sep=None, maxsplit=-1) # Splits on 'sep'...
41. Strip specific characters from string. Write a Python program to strip a set of characters from a string. Click me to see the sample solution 42. Count repeated characters in string. Write a Python program to count repeated characters in a string. ...
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UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-1: ordin al not in range(128) 1. 2. 3. 4. 所以中文字符串使用print语句打印的时候,需要转换为Unicode 方法一: unicode(lineEdit.text()) 方法二: u'%s' %(lineEdit.text()) ...