Regular Expressions 101

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"
(.*\.net)[^\?#]*(.*)
"
im
1st Capturing Group
(.*\.net)
.
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)
\. matches the character . with index 4610 (2E16 or 568) literally (case insensitive)
net
matches the characters net literally (case insensitive)
Match a single character not present in the list below
[^\?#]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\? matches the character ? with index 6310 (3F16 or 778) literally (case insensitive)
# matches the character # with index 3510 (2316 or 438) literally (case insensitive)
2nd 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)
Global pattern flags
i modifier: insensitive. Case insensitive match (ignores case of [a-zA-Z])
m modifier: multi 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.

Regular Expression
No Match

r"
"
im

Test String

Substitution

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Code Generator

Generated Code

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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