regex python find dollar amount and few words at the same time -

i need find dollar amount , few(3 or 4) words surrounding amount @ same time in 1 paragraph.

in-process research , development of $184.3 million , charges $120 of  million impairment of long-lived assets. see notes 2, 16 and21  consolidated financial statements. income continuingoperations        fiscal year ended september 30, 2001 includes netgain on sale of  businesses , investments of $276.6 million , net gainon sale of  common shares of subsidiary of $64.1 million. 

what want below, [amount, amount+ digit words, 3-4 words after before amount].

[$184.3 $184.3 million, research , development of $184.3 million],[$120, $120 of million,charges $120 of  million impairment of long-lived assets ], [$276.6, $276.6 million, investments of $276.6 million] ,[ $64.1, $64.1 million,  subsidiary of $64.1 million.] 

what tried , found dollar amount.

[\$]{1}\d+\.?\d{0,2} 

thanks!

so let's name pattern have:

amount_patt = r"[\$]{1}[\d,]+\.?\d{0,2}" 

digit word should defined using above:

digit_word_patt = amount_patt + r" (\w+)" 

now, surrounding 3-4 words, following:

words_patt = r"(\s+ ){3, 4}" + amount_patt + r"(\s+ ){3, 4}" 

you're done! use these re methods string extraction.