Regular Expressions 101

Group 1(lease\s(?P<ip>[0-9\.]+)\s{.+})

leasethe literal text lease (case sensitive)

\sa Unicode whitespace character

Group ip(?P<ip>[0-9\.]+)

Character Class[0-9\.]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\sa Unicode whitespace character

{the literal { (123₁₀ / 173₈ / 7B₁₆)

.+any Unicode character, repeated at least once

}the literal } (125₁₀ / 175₈ / 7D₁₆)

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

s modifier: single line. Allows a dot to match line terminators

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Search reference

Regular Expression

(lease\s(?P<ip>[0-9\.]+)\s{.+})

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