Python提取前3个单词和3个单词后带有正则表达式的特定单词列表

Question

I need to use python to extract 3 words before and 3 words after a specific list of words

Nokia Lumia 930 Smartphone, Display 5 pollici, Fotocamera 20 MP, 2GB RAM, Processore Quad-Core 2,2GHz, Memoria 32GB, Windows Phone 8.1, Bianco [Germania]

At the moment I'm using this regex without success

((?:[\S,]+\s+){0,3})ram\s+((?:[\S,]+\s*){0,3})

https://regex101.com/r/yN6iI0/1

My list of words that I need is:

• Display
• Fotocamera
• RAM
• Processore
• Memoria

Answer 1

You regex did not work because \\s+ requires at least 1 whitespace, but between RAM and , there is none. Either use a * quantifier or just remove it and use ``

(?i)((?:\S+\s+){0,3})\bRAM\b\s*((?:\S+\s+){0,3})

See demo

I added \\b (word boundary) to make sure we match RAM , not RAMBUS .

Mind the re.I modifier (or use an inline version (?i) at the beginning of the pattern).

Other patterns can be formed in a similar way, just replace RAM with the words from your list.

Answer 2

((?:[\S,]+\s+){0,3})ram,?\s+((?:[\S,]+\s*){0,3})

                       ^^

Just add a , .See demo.

https://regex101.com/r/yN6iI0/4

You can use this finally,

((?:[\S,]+\s+){0,3})(?:ram|Display|Fotocamera|RAM|Processore|Memoria),?\s+((?:[\S,]+\s*){0,3})