# coding=utf8
# the above tag defines encoding for this document and is for Python 2.x compatibility
import re
regex = r"{{([^},]+)(?:,([^}]+))?}}"
test_str = ("This is my first example string. {{foo}} This is what it looks like.\n"
"This is my second example string. {{1,2}}. This is what it looks like.\n"
"This is my third example string. {{a,b}} and {{2}}. This is")
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