# coding=utf8
# the above tag defines encoding for this document and is for Python 2.x compatibility
import re
regex = r"roll (\d+)d(\d+)([\+-]\d+)?$"
test_str = ("roll 1d10\n"
"roll 1d100\n"
"roll 1d20\n"
"roll 1d1234\n"
"roll 1d20+1\n"
"roll 1d20-1\n"
"roll 1d20*1\n"
"roll 1d20a1\n")
matches = re.finditer(regex, test_str, re.IGNORECASE)
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