Run functions for each item on python list separately and append results retrieved from functions to a new list

问题

I'm looking for a way to pass separately each ID from 'email' list as a string to my functions and retrieve 'customerId' and save it to a 'newList' for each item on email list.

my code:

email = ['733867', '7338704']
newList = []

for x in email:
    def get_email_details(email, token, userId):
        headers = {     'accept': 'application/json', 
                'Content-Type': 'application/json', 
                'token': token,
                'userId': userId}
        endpoint = 'request/' + email + '/details'
        return requests.get(url = HOST + endpoint, headers = headers, verify=False)
def get_customerId_list_per_email(email, token, userId):
    for x in email:
        r = json.loads(get_email_details(email, token, userId).text)
        for c in r['newList']:
            newList.append(c['customerId'])
        return newList
customers = get_customerId_list_per_email(email, token, userId)      

when I run the above I receive this error:

Traceback (most recent call last):
File "<stdin>", line 16, in <module>
File "<stdin>", line 13, in get_customerId_list_per_email
KeyError: 'newList'     

Desired outcome when calling 'newList' should be:

>>> newList
[678975, 4356883]

It works for me, but only if I would submit a single email id:

#if trying with list like this: email = [733867970] then it won't work and will throw following error: TypeError: must be str, not list
email = ['733867970']


def get_email_details(email, token, userId):
    headers = {     'accept': 'application/json', 
                'Content-Type': 'application/json', 
                'token': token,
                'userId': userId}
    endpoint = 'request/' + email + '/details'
    return requests.get(url = HOST + endpoint, headers = headers, verify=False)


def get_customer_list_per_email(email, token, userId):
    corrList = []
    for x in email:
        r = json.loads(get_email_details(email, token, userId).text)
        for c in r['corrList']:
            corrList.append(c['customerId'])
        return corrList

customers = get_customer_list_per_email(email, token, userId)

When running the above I'm receiving single customerID for this emailID:

>>> corr
[733867972]

Could someone be able to help with this problem? Thanks in advance!

来源：https://stackoverflow.com/questions/61392355/run-functions-for-each-item-on-python-list-separately-and-append-results-retriev