Grab data from http://www.hydro.eaufrance.fr/stations/O7502510&procedure=tousmois

dump_table.py

from urllib2 import urlopen
from BeautifulSoup import BeautifulSoup

data = urlopen('''http://www.hydro.eaufrance.fr/stations/O7502510&procedure=tousmois''').read()
soup = BeautifulSoup(data)
table = soup.find('table', {'summary': "valeurs mensuelles et annuelles"})

for tr in table.findAll('tr'):
        line = []
        for td in tr.findAll('td'):
                try:
                        line.append(td.find('input', {'name':'value'})['value'])
                except TypeError:
                        line.append(td.text)

        print ','.join(line)