# coding=utf8
# the above tag defines encoding for this document and is for Python 2.x compatibility
import re
regex = r"\sfor\s(?:invalid\suser\s)?(?<Username>\w+)\s\w+\s(?<IP>[^\s]+)"
test_str = ("Thu Sep 07 2021 00:15:06 mailsv1 sshd[2605]: Failed password for invalid user itmadmin from 194.8.74.23 port 4692 ssh2\n"
"Thu Sep 07 2021 00:15:06 mailsv1 sshd[3759]: Failed password for nagios from 194.8.74.23 port 3769 ssh2")
matches = re.finditer(regex, test_str, re.MULTILINE)
for matchNum, match in enumerate(matches, start=1):
print ("Match {matchNum} was found at {start}-{end}: {match}".format(matchNum = matchNum, start = match.start(), end = match.end(), match = match.group()))
for groupNum in range(0, len(match.groups())):
groupNum = groupNum + 1
print ("Group {groupNum} found at {start}-{end}: {group}".format(groupNum = groupNum, start = match.start(groupNum), end = match.end(groupNum), group = match.group(groupNum)))
# Note: for Python 2.7 compatibility, use ur"" to prefix the regex and u"" to prefix the test string and substitution.
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Python, please visit: https://docs.python.org/3/library/re.html