How to remove punctuation marks in python

Since punctuation marks are removed, of course, regular expressions are used.

Regular expression, also known as regular expression. (English: Regular Expression, often abbreviated as regex, regexp or RE in code), a concept in computer science. Regular expressions are often used to retrieve and replace text that matches a certain pattern (rule). (Recommended learning: Python video tutorial)

Regular expression is a logical formula for string operations, which uses some specific characters defined in advance, and these specific A combination of characters forms a "rule string". This "rule string" is used to express a filtering logic for strings.

Given a regular expression and another string, we can achieve the following goals:

1. Whether the given string conforms to the regular expression The filtering logic of expressions (called "matching"):

2. We can get the specific part we want from a string through regular expressions.

You can filter the punctuation marks in the string to remove or replace the punctuation marks.

import re
 
punctuation = '!,;:?"\''
def removePunctuation(text):
    text = re.sub(r'[{}]+'.format(punctuation),'',text)
    return text.strip().lower()
 
text = " Hello, world!  "
print removePunctuation(text)

The characteristics of regular expressions are:

1. Very flexible, logical and functional;

2. Can be quickly Achieve complex control of strings in an extremely simple way.

3. For those who are new to it, it is relatively obscure.

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