import re
regex = re.compile(r"^.+?(\d+\s?[а-я]+)\.$", flags=re.MULTILINE)
test_str = ("товар номер один емкость 50 мл, упаковка 60 шт.\n"
"товар номер два упаковка 100 шт.\n"
"товар номер три 10шт.")
subst = "$1"
result = regex.sub(subst, test_str)
if result:
print(result)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Python, please visit: https://docs.python.org/3/library/re.html