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^(\d\d\d\d-\d\d-\d\dT\d\d:\d\d:\d\d\.\d\d\d\d\d\d-\d\d:\d\d) (.*?) (.*?): (.*)$

"

gm

^ asserts position at start of a line

1st Capturing Group

(\d\d\d\d-\d\d-\d\dT\d\d:\d\d:\d\d\.\d\d\d\d\d\d-\d\d:\d\d)

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

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

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

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

- matches the character - with index 45_{10} (2D_{16} or 55_{8}) literally (case sensitive)

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

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

- matches the character - with index 45_{10} (2D_{16} or 55_{8}) literally (case sensitive)

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

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

T matches the character T with index 84_{10} (54_{16} or 124_{8}) literally (case sensitive)

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

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

: matches the character : with index 58_{10} (3A_{16} or 72_{8}) literally (case sensitive)

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

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

: matches the character : with index 58_{10} (3A_{16} or 72_{8}) literally (case sensitive)

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

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

\. matches the character . with index 46_{10} (2E_{16} or 56_{8}) literally (case sensitive)

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

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

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

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

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

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

- matches the character - with index 45_{10} (2D_{16} or 55_{8}) literally (case sensitive)

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

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

: matches the character : with index 58_{10} (3A_{16} or 72_{8}) literally (case sensitive)

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

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

matches the character with index 32_{10} (20_{16} or 40_{8}) literally (case sensitive)

2nd Capturing Group

(.*?)

.

matches any character (except for line terminators)*? matches the previous token between zero and unlimited times, as few times as possible, expanding as needed (lazy)

matches the character with index 32_{10} (20_{16} or 40_{8}) literally (case sensitive)

3rd Capturing Group

(.*?)

.

matches any character (except for line terminators)*? matches the previous token between zero and unlimited times, as few times as possible, expanding as needed (lazy)

:

matches the characters : literally (case sensitive)4th Capturing Group

(.*)

.

matches any character (except for line terminators)* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)

$ asserts position at the end of a line

Global pattern flags

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

m modifier: **m**ulti line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)

Your regular expression does not match the subject string.

No Match

r"

"

gm

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