Regex findall

Python re compile

import re
#	Compile a regular expression pattern into a regular expression object, which can be used for matching using its match(), search() and other methods, described below.

prog = re.compile(pattern)
result = prog.match(string)

#	is equivalent to

result = re.match(pattern, string)

Source: docs.python.org

Python .findall

  ## Search for pattern 'bb' in string 'aabbcc'.
  ## All of the pattern must match, but it may appear anywhere.
  ## On success, match.group() is matched text.
  match = re.search(r'bb', 'aabbcc') # found, match.group() == "bb"
  match = re.search(r'cd', 'aabbcc') # not found, match == None

  ## . = any char but \n
  match = re.search(r'...c', 'aabbcc') # found, match.group() == "abbc"

  ## \d = digit char, \w = word char
  match = re.search(r'\d\d\d', 'p123g') # found, match.group() == "123"
  match = re.search(r'\w\w\w', '@@abcd!!') # found, match.group() == "abc"

Regex findall

import re
# regex for finding mentions in a tweet
regex = r"(?<!RT\s)@\S+"
tweet = '@tony I am so over @got and @sarah is dead to me.'

# mentions = ['@tony', '@got', '@sarah'] 
mentions = re.findall(regex, tweet)

Similar codes

2 votes147 views1 answer
Django orm timestamp field
Python
0 vote154 views4 answers
Phone number field
Python
1 vote161 views1 answer
How to add special token to bert tokenizer
Python
0 vote155 views1 answer
Pass query params django template
Python
0 vote148 views1 answer
Numpy generlized ufunc
Python
0 vote197 views1 answer
Bash: line 1: templates/addtask.html: No such file or directory in flask app
Python Flask
5 votes176 views1 answer
Datetime one week ago python
Python
1 vote179 views1 answer
What happens when you use the built-in function any() on a list?
Python
7 votes123 views2 answers
Python string prefix
Python
1 vote144 views1 answer
Python flask display variable in html
Python Flask