python - Replacing an xml tag with regex -

python - Replacing an xml tag with regex -

i utilize lxml parse xml, in case, need alter content of single tag.

<sales_start_date>yyyy-mm-dd</sales_start_date>

yyyy-mm-dd variable date.

how replace above to:

<sales_start_date>2013-01-01</sales_start_date>

here have (which sort of works)

re.sub('<sales_start_date>[\d-]+</sales_start_date>', '<sales_start_date>2013-01-01</sales_start_date>', data)

since know exact tags, pretty simple, grab character until next tag (any character not <):

re.sub('<sales_start_date>[^<]+</sales_start_date>', '<sales_start_date>2013-01-01</sales_start_date>', data)

python regex