regex101: Python Match Workspace

Pro

(?a)applies the following effective flags to the remainder of the pattern: gma

a modifier: ascii. Forces the escape sequences \w, \W, \b, \B, \d, \D, \s, and \S to perform ASCII-only matching instead of Unicode matching

Negative Lookbehind(?<![/\d])

Character Class[/\d]

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\da digit

Negative Lookbehind(?<!\d[.-])

\da digit

Character Class[.-]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 1(\d+(?:\.\d+)?)

\d+a digit, repeated at least once

Non-Capturing Group(?:\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

\s*any whitespace character, repeated any number of times

MLthe literal text ML (case sensitive)

\ban ASCII word boundary

Negative Lookahead(?!/)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

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

25 tokens

Regular Expression

(?a)(?<![/\d])(?<!\d[.-])(\d+(?:\.\d+)?)\s*ML\b(?!/)

10ML >> ['10']
10 ML >> ['10']
10.5ML >> ['10.5']
1MG/1ML >> []
1MG/10ML >> ['0'] # Wrong []
10MG/0.5ML >> ['.5'] # Wrong []
   10ML and 15ML   >> ['10', '15']
LODEXA (DEXAMETHASONE) 5 MG/ML INJECTION >> []
NSS.0.9% 1000 ML (PLASTIC BAG) >> ['1000']
110 MLM HIDRASEC (RACECADOTIL)10 ML POWDER FOR 1-30 ML >> ['10', '30'] # Wrong ['10']

Substitution

10ML >> ['10']
10 ML >> ['10']
10.5ML >> ['10.5']
1MG/1ML >> []
1MG/10ML >> ['0'] # Wrong []
10MG/0.5ML >> ['.5'] # Wrong []
   10ML and 15ML   >> ['10', '15']
LODEXA (DEXAMETHASONE) 5 MG/ML INJECTION >> []
NSS.0.9% 1000 ML (PLASTIC BAG) >> ['1000']
110 MLM HIDRASEC (RACECADOTIL)10 ML POWDER FOR 1-30 ML >> ['10', '30'] # Wrong ['10']