Mysterious error when accessing BRENDA with zeep - zeep

Question

I'm trying to get all human Kcats and KMs from BRENDA using SOAP (technically zeep with Python3 I guess). I used this code, which follows the example code given here:
from zeep import Client
import hashlib
wsdl = "https://www.brenda-enzymes.org/soap/brenda_zeep.wsdl"
password = hashlib.sha256("password".encode("utf-8")).hexdigest()
client = Client(wsdl)
parameters = (
"email#email.com",
password,
"organism*Homo sapiens"
)
resultString = client.service.getKcatKmValue(*parameters)
and it gives me the error "Missing element organism (getKcatKmValue.organism)"
It's not clear to me what I'm doing wrong. Any insight would be appreciated.

Answer 1

If you run this command to inspect the definition of methods/operations:
python -mzeep https://www.brenda-enzymes.org/soap/brenda_zeep.wsdl
you can see the definition of getKcatKmValue as follows:
getKcatKmValue(email: xsd:string, password: xsd:string, ecNumber: xsd:string, organism: xsd:string, kcatKmValue: xsd:string, kcatKmValueMaximum: xsd:string, substrate: xsd:string, commentary: xsd:string, ligandStructureId: xsd:string, literature: xsd:string) -> return: ns0:ArrayOfKcatKmValues
so all of these parameters must be supplied which you are not passing in parameters hence the error.
a dict can also be passed to operation for a better visibility of passed arguments like this:
parameters = {
'email': "email#email.com",
'password': password,
'ecNumber': ecNumber,
'organism': "organism*Homo sapiens",
'kcatKmValue': kcatKmValue,
'kcatKmValueMaximum': kcatKmValueMaximum,
'substrate': substrate,
'commentary': commentary,
'ligandStructureId': ligandStructureId,
'literature' : literature
}
# then pass dict as follows:
resultString = client.service.getKcatKmValue(**parameters)
hope this helps.