Regular Expressions 101

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"
[sS]/[^/]{1,64}/[^/]{1,64}[^ ]
"
Match a single character present in the list below
[sS]
sS
matches a single character in the list sS (case sensitive)
/ matches the character / with index 4710 (2F16 or 578) literally (case sensitive)
Match a single character not present in the list below
[^/]
{1,64} matches the previous token between 1 and 64 times, as many times as possible, giving back as needed (greedy)
/ matches the character / with index 4710 (2F16 or 578) literally (case sensitive)
/ matches the character / with index 4710 (2F16 or 578) literally (case sensitive)
Match a single character not present in the list below
[^/]
{1,64} matches the previous token between 1 and 64 times, as many times as possible, giving back as needed (greedy)
/ matches the character / with index 4710 (2F16 or 578) literally (case sensitive)
Match a single character not present in the list below
[^ ]
matches the character with index 3210 (2016 or 408) literally (case sensitive)
Your regular expression does not match the subject string.

Regular Expression
No Match

r"
"

Test String