Regular Expressions 101

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"
\?[^w$]\$$|[]^C]\w$|w\^|\|..\)
"
gm
1st Alternative
\?[^w$]\$$
\? matches the character ? literally (case sensitive)
Match a single character not present in the list below
[^w$]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
w$ matches a single character in the list w$ (case sensitive)
\$ matches the character $ literally (case sensitive)
$ asserts position at the end of a line
2nd Alternative
[]^C]\w$
Match a single character present in the list below
[]^C]
]^C matches a single character in the list ]^C (case sensitive)
\w
matches any word character (equivalent to [a-zA-Z0-9_])
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
$ asserts position at the end of a line
3rd Alternative
w\^
w matches the character w literally (case sensitive)
\^ matches the character ^ literally (case sensitive)
4th Alternative
\|..\)
\| matches the character | literally (case sensitive)
. matches any character (except for line terminators)
. matches any character (except for line terminators)
\) matches the character ) literally (case sensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
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"
"
gm

Test String