# coding=utf8
# the above tag defines encoding for this document and is for Python 2.x compatibility
import re
regex = r"^(.*)([\w_-]{11})\.(mp4|mkv|flv)$"
test_str = ("ATI Stream OpenCLâ„¢ Technical Overview [Part 1] - What is OpenCLâ„¢-ecYIsu83c0I.mkv\n"
"ATI Stream OpenCLâ„¢ Technical Overview [Part 2] - What is OpenCLâ„¢ (Continued)-PxPs9yKs5P8.mkv\n"
"ATI Stream OpenCLâ„¢ Technical Overview [Part 3a] - Resource Setup-EbXf7MRXlpE.mkv\n"
"ATI Stream OpenCLâ„¢ Technical Overview [Part 3b] - Resource Setup-uaevrJbksA0.mkv\n"
"ATI Stream OpenCLâ„¢ Technical Overview [Part 4a] - Kernel Execution-IBTH2tDLqXU.mkv\n"
"ATI Stream OpenCLâ„¢ Technical Overview [Part 4b] - Kernel Execution-SzymylQaA5w.mkv\n"
"ATI Stream OpenCLâ„¢ Technical Overview [Part 5a] - Programming with OpenCLâ„¢ C-KFAkUsn4YPg.mkv\n"
"ATI Stream OpenCLâ„¢ Technical Overview [Part 5b] - Programming with OpenCLâ„¢ C-Jt4iTDvGdNE.mkv\n"
"ATI Stream Technology Driving the Future of HPC--LXAa8wm23E.mkv")
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