# coding=utf8
# the above tag defines encoding for this document and is for Python 2.x compatibility
import re
regex = r"(?<=^|\bfoobar\b)(?!foobar\b)(.*?)(?=\bfoobar\b|$)"
test_str = ("notfoobarfoobarnot\n"
"this should be highlighted, and\n"
"same with this. but any sentence\n"
"that has the word\n"
"foobar\n"
"shouldnt be, and same for any regular\n"
"sentence with foobar <-- like that\n"
"foobar beginning a sentence should invalidate\n"
"the entire sentence, same with at the end foobar\n"
"only foobar, and nothing else of the sentence\n"
"more words here more irrelevant stuff to highlight\n"
"and nothing of the key word\n"
"what about multiple foobar on the same foobar line?")
matches = re.finditer(regex, test_str, re.DOTALL)
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