get list of Uniprot FASTA Sequences by "EC no" and "organism name" from unirprotkb

uniprot_ec.py

from bs4 import BeautifulSoup
import requests
import urllib
import sys

# python uniprot_ec.py 2.3.1.29
#
ec=sys.argv[1]
id=[]
url='http://www.uniprot.org'
r = requests.get(url+'/uniprot/?query='+ec+'+and+ftu&sort=score')


if r.status_code == 404:
    print "no url present"
    sys.exit()
soup = BeautifulSoup(r.text)
table = soup.find('table', attrs={'class':'entryID'})
for link in soup.find_all(table):
        a=link.get('href')
        if a is not  None:                  
            if 'uniprot/' in a and len(a)==15:          
               print 'ID****>',a
               id.append(a)  


def get_file(url,file,ec):
	print 'Downloading..... '+ url
        handle = urllib.urlopen(url)
        with open(file, 'a') as out:
            while True:
                data = handle.read(1024)
                if len(data) == 0: break
                out.write(ec)
                out.write("\n")
                out.write(url)
                out.write("\n")
                out.write(data)
                out.write("\n\n")   
                
                                        
for i in id:                                                                                        
    fastaurl=url+''+ i+'.fasta'
    print get_file(fastaurl,'fasta.txt',ec)