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)python regular expression
import re
# The string you want to find a pattern within
test_string = 'Hello greppers!'
# Creating a regular expression pattern
# This is a simple one which finds "Hello"
pattern = re.compile(r'Hello')
# This locates and returns all the occurences of the pattern
# within the test_string
match = pattern.finditer(test_string)
# Outputs all the ocurrences which were returned as
# as match objects
for match in matches:
print(match)python pattern match
import re
pattern = re.compile('[a-zA-Z ]+') # a...z A...Z and space allowed
message = "Weather is nice"
if pattern.match(message).group() == message:
print("match")
else:
print("no match")regex findall
import re
# regex for finding mentions in a tweet
regex = r"(?<!RTs)@S+"
tweet = '@tony I am so over @got and @sarah is dead to me.'
# mentions = ['@tony', '@got', '@sarah']
mentions = re.findall(regex, tweet)re.match() python
import re
pattern = '^a...s$'
test_string = 'abyss'
result = re.match(pattern, test_string)
if result:
print("Search successful.")
else:
print("Search unsuccessful.")re python3
import re
>>> m = re.search('(?<=abc)def', 'abcdef')
>>> m.group(0)
'def'Copyright © 2021 Codeinu
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