Python regex with unicode strings not working

Question

I'm trying to receive the prices from the following string:

"€29,95 ipv €69,95 – ezCast M2 Original "

With the following regex:

[\$\£\€](\d+(?:.\d{1,2})?)

According to regex testers the above regex works fine (I receive 29,95 and 69,95 without currency, so that's good)... But in python it doesn't. I think it's because of the fact python unicodes strings. Because if I print the string on my screen I get:

[u'\u20ac29,95 ipv \u20ac69,95 \u2013 ezCast M2 Original']

I tried the following codes:

p = re.findall('[\$\£\€](\d+(?:.\d{1,2})?)',str(prices))
p = re.findall(u'[\$\£\€](\d+(?:.\d{1,2})?)',str(prices))
p = re.findall(ur'[\$\£\€](\d+(?:.\d{1,2})?)',str(prices))
p = re.findall(r'[\$\£\€](\d+(?:.\d{1,2})?)',str(prices))

None of those work... But the one below DOES work:

p = re.compile('(\d+(?:.\d{1,2})?)')
        #
        for m in p.findall(str(prices)):
            print m

But then I receive ALL numbers and I just want the numbers behind a currency.

Anyone who can help me out?

Try r'[$£€](\d+(?:\.\d{1,2})?)'

hjpotter92
– hjpotter92

2014-07-04 12:54:03 +00:00
Commented Jul 4, 2014 at 12:54 — hjpotter92
– hjpotter92, Commented Jul 4, 2014 at 12:54

falsetru · Accepted Answer · 2014-07-04 13:12:09Z

2

Convert the string into unicode by decoding it.

>>> prices = "€29,95 ipv €69,95  ezCast M2 Original "
>>> re.findall(ur'[\$\\€](\d+(?:.\d{1,2})?)', prices.decode('utf-8'))
[u'29,95', u'69,95']

edited Jul 4, 2014 at 13:12

answered Jul 4, 2014 at 12:55

falsetru

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2 Comments

Erik van de Ven Over a year ago

Thanks! It brought me on the right path! I only needed to add .pop() to prices to get the first item from the list. .decode('utf-8') wasn't necessary anymore :)

zx81 Over a year ago

Useful and concise answer. :) +1

Samuel Dauzon · Accepted Answer · 2014-07-04 12:53:10Z

0

You can use this regex :

.*?(\d+,\d+).*?ipv.*?(\d+,\d+).*?

It ignores € sign and depends on "ipv" separator. You must get \1 and \2 elements

answered Jul 4, 2014 at 12:53

Samuel Dauzon

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Comments

Paolo Casciello · Accepted Answer · 2014-07-04 12:54:43Z

0

You need to encode the string:

>>> prices = u'\u20ac29,95 ipv \u20ac69,95 \u2013 ezCast M2 Original'
>>> p = re.findall('[\$\£\€](\d+(?:.\d{1,2})?)',prices.encode('utf8'))
>>> p
['29,95', '69,95']

answered Jul 4, 2014 at 12:54

Paolo Casciello

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