Group device_id(?P<device_id>[0-9a-z]{16}) Character Class[0-9a-z]{16} {16}matches exactly 16 characters from the set below:
0-9one character from 0 (4810) to 9 (5710)
a-zone character from a (9710) to z (12210) (case sensitive)
_the literal _ (9510 / 1378 / 5F16)
Group date(?P<date>\d{8}) \d{8}a digit, repeated exactly 8 times
_the literal _ (9510 / 1378 / 5F16)
Group time(?P<time>\d{6}) \d{6}a digit, repeated exactly 6 times
_the literal _ (9510 / 1378 / 5F16)
Group microseconds(?P<microseconds>\d{6}) \d{6}a digit, repeated exactly 6 times
_the literal _ (9510 / 1378 / 5F16)
Group frame_index(?P<frame_index>\d{6}) \d{6}a digit, repeated exactly 6 times