替换多个模式python

Question

I have reviewed various links but all showed how to replace multiple words in one pass. However, instead of words I want to replace patterns eg

RT @amrightnow: "The Real Trump" Trump About You" Watch Make #1 https:\\/\\/t.co\\/j58e8aacrE #tcot #pjnet #1A #2A #Tru mp #trump2016 https:\\/\\/t.co\…

When I perform the following two commands on the above text I get the desired output

result = re.sub(r"http\S+","",sent)
result1 = re.sub(r"@\S+","",result)

This way I am removing all the urls and @(handlers from the tweet). The output will be something like follows:

>>> result1
'RT  "The Real Trump" Trump About You" Watch Make #1  #tcot #pjnet #1A #2A #Trump #trump2016 '

Could someone let me know what is the best way to do it? I will be basically reading tweets from a file. I want to read each tweet and replace these handlers and urls with blanks.

Answer 1

You need the regex "or" operator which is the pipe | :

re.sub(r"http\S+|@\S+","",sent)

If you have a long list of patterns that you want to remove, a common trick is to use join to create the regular expression:

to_match = ['http\S+',
            '@\S+',
            'something_else_you_might_want_to_remove']

re.sub('|'.join(to_match), '', sent)

Answer 2

You can use an "or" pattern by separating the patterns with | :

import re

s = u'RT @amrightnow: "The Real Trump" Trump About You" Watch Make #1 https:\/\/t.co\/j58e8aacrE #tcot #pjnet #1A #2A #Tru mp #trump2016 https:\/\/t.co\u2026'
result = re.sub(r"http\S+|@\S+", "", s)
print result

Output

RT  "The Real Trump" Trump About You" Watch Make #1  #tcot #pjnet #1A #2A #Tru mp #trump2016

See the subsection '|' in the regular expression syntax documentation.