Regex to extract both integer or float values followed by a unit, Python

Question

I want to build a regex which captures all patterns inside a string where an integer or a floating point number is present before an unit of measurement(ml,mg,kg etc). My current regex only considers integers and breaks when there's a space. I want to handle these in my code.

p = re.compile('[0-9](?:mg|kg|ml|q.s.|ui|M|g|µg)')
x = '0.9mg is the approximate dosage'
z = p.findall(x)
print(z)

which doesn't work for decimals and also breaks when there's a space.

Expected patterns to be captured are:

Examples: 0.9 mg, 9 mg, 9mg, 0.9mg

Any help regarding this

Using the regex in the code:

mg = []
newregex = r"[0-9\.\s]+(?:mg|kg|ml|q.s.|ui|M|g|µg)" 
for s in zz:
    for e in extracteddata:
        v = re.search(newregex,extracteddata,flags=re.IGNORECASE|re.MULTILINE)
        if v:
            mg.append(v.group(0))

Answer 1

You can try with this:

([.\d]+)\s*(?:mg|kg|ml|q.s.|ui|M|g|µg)

Try it online.