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

1 vote318 views1 answer
Python moving average of list
Python
0 vote356 views1 answer
Flask server not reloading
Python Flask
0 vote344 views1 answer
Pyserial example code
Python
1 vote352 views1 answer
Remove all pyc files
Python
0 vote341 views2 answers
Force garbage collection in python
Python
0 vote340 views1 answer
Str='python' print(len(str[1:-2])) will print ____
Python
0 vote334 views1 answer
Split list on every nth element python
Python
0 vote335 views1 answer
Jupyter notebook plot background dark theme
Python
23 votes325 views2 answers
Merge on index pandas
Python
111 votes332 views6 answers
Rename columns
Python