uniprot_to_emsembl_conversion.py

import gzip

# download idmapping.dat.gz from uniprot
# wget ftp://ftp.ebi.ac.uk/pub/databases/uniprot/current_release/knowledgebase/idmapping/idmapping.dat.gz
id_mapping_file = './idmapping.dat.gz'

id_mapping = {}
for line in gzip.open(id_mapping_file):
    line = line.decode('utf8').strip()
    ac, pred, obj = line.split('\t')
    if pred == 'Ensembl':
        print(obj)
        id_mapping[ac] = obj