正則表達式Python在同一時間找到美元金額和幾個字

Question

我需要在一個段落中同時找到美元金額和少數（3或4）圍繞該金額的單詞。

in-process research and development of $184.3 million and charges $120 of 
million for the impairment of long-lived assets. See Notes 2, 16 and21 to the 
Consolidated Financial Statements. Income from continuingoperations for the  
fiscal year ended September 30, 2001 also includes a netgain on sale of 
businesses and investments of $276.6 million and a net gainon the sale of 
common shares of a subsidiary of $64.1 million. 

我想要得到的是類似下面， [金額，金額+數字的話，3-4個單詞量之前後。

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

我試過的是這個，它只發現美元的金額。

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

謝謝！

Answer 1

讓我們名字的模式，你必須：

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

現在，周圍3-4的話，請執行下列操作：

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

位數字應該使用上述被定義則：

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

你完成了！現在簡單地用你的re方法來提取字符串。