# coding=utf8
# the above tag defines encoding for this document and is for Python 2.x compatibility
import re
regex = r"\bfoo\b|_foo_"
test_str = ("foo ---foo-- abc.foo.def 123(foo)456\n"
"_foo_ (_foo_)\n\n"
"foofooo foo_foo\n"
"___foo___\n\n"
"xxx_foo_zzzz xxxfoozzz\n"
"0000 foo_\n"
"9999 _foo...\n\n"
"foo_abc cba_foo\n\n"
"a foo_ _foo bar")
matches = re.finditer(regex, test_str)
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