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

18 votes313 views3 answers
Run calc.exe inside python
Python
78 votes136 views6 answers
Python sort dict by value
Python
0 vote137 views1 answer
Backticks equivalent python template
Python
2 votes100 views2 answers
Iterate in pandas dataframe
Python
0 vote122 views1 answer
How to get index of closest value in list python
Python
1 vote128 views1 answer
Pandas add character to string
Python
0 vote123 views1 answer
Row to column python numpy
Python
0 vote138 views1 answer
Python Remove Character from String using replace()
Python
0 vote138 views1 answer
Python convert strings to chunks
Python
19 votes139 views1 answer
Python left string
Python