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"

(?P<l>\d+(\,\d+)?)\s*x\s*(?P<w>\d+(\,\d+)?)\s*x\s*(?P<h>\d+(\,\d+)?)

"

g

Named Capture Group l

(?P<l>\d+(\,\d+)?)

\d

matches a digit (equivalent to [0-9])+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)

2nd Capturing Group

(\,\d+)?

? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)

\, matches the character , with index 44_{10} (2C_{16} or 54_{8}) literally (case sensitive)

\d

matches a digit (equivalent to [0-9])+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)

\s

matches any whitespace character (equivalent to [\r\n\t\f\v ])* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)

x matches the character x with index 120_{10} (78_{16} or 170_{8}) literally (case sensitive)

\s

matches any whitespace character (equivalent to [\r\n\t\f\v ])* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)

Named Capture Group w

(?P<w>\d+(\,\d+)?)

\d

matches a digit (equivalent to [0-9])+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)

4th Capturing Group

(\,\d+)?

? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)

\, matches the character , with index 44_{10} (2C_{16} or 54_{8}) literally (case sensitive)

\d

matches a digit (equivalent to [0-9])\s

matches any whitespace character (equivalent to [\r\n\t\f\v ])* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)

x matches the character x with index 120_{10} (78_{16} or 170_{8}) literally (case sensitive)

\s

matches any whitespace character (equivalent to [\r\n\t\f\v ])Named Capture Group h

(?P<h>\d+(\,\d+)?)

\d

matches a digit (equivalent to [0-9])6th Capturing Group

(\,\d+)?

? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)

\, matches the character , with index 44_{10} (2C_{16} or 54_{8}) literally (case sensitive)

\d

matches a digit (equivalent to [0-9])Global pattern flags

g modifier: **g**lobal. All matches (don't return after first match)

Your regular expression does not match the subject string.

No Match

r"

"

g

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