python中搜索模式内的变量

Question

I have a soup from BeautifulSoup and I have a list of keys (key_image) which value or values I want to introduce in another list.

    soup = BeautifulSoup(stringapplet)
    key_image = ['archivo=', 'imagen=', 'image=', 'imaxe=', 'arquivo=']
    imageslist = []

This way I get the list of values for archivo :

    patron = re.compile(r"archivo='([\w\./]+)'")
    for tag in soup.findAll('param'):
        if patron.search(tag['value']):
            imageslist.append(patron.search(tag['value']).group(1))

good, but... I need in imageslist also searches of "patrons" like archivo : of imagen , of imaxe ... etc. so I suppose I need to introduce a variable in a search pattern, then I do:

    for x in key_image:
        if string.find(stringapplet, x) != -1:
            expression = 'r' + '"' + x + "'" + '([\w\./]+)' + "'" + '"'
            patron = re.compile(expression)
            for tag in soup.findAll('param'):
                if patron.search(tag['value']):
                    imageslist.append(patron.search(tag['value']).group(1))

but imageslist is empty because the last line is never loaded. ¿?

I do patron.pattern and I get r"archivo='([\\w./]+)'" also, so what is wrong?

How can I do the search of all values of all key_images values?

Thanks.

Answer 1

for x in key_image:
    if string.find(stringapplet, x) != -1:
        expression = r"%s'([\w\./]+)'" % x
        patron = re.compile(expression)
        for tag in soup.findAll('param'):
            result = patron.search(tag['value'])
            if result:
                imageslist.append(result.group(1))