Given requests to add users to a group, output a list of the members of each group.

members.py

'''
Given requests to add users to a group, output a list of the members of each group.
'''

def listMembers(string_list):
    '''
    We could automate the creation of a new group that is not in the
    alphabetically ordered list of groups yet. However, I believe that is beyond
    the scope of what this assignment is asking for.
    '''
    if string_list == '':
        print("Please provide a list of the users")
    else:
        groups_list = [["admins"], ["students"], ["teachers"]]
        string_list= string_list.lower()
        users_list = string_list.split("\n")
        for user in users_list:
            name_and_group = user.split()
            if name_and_group[1] == "admins":
                groups_list[0].append(name_and_group[0])
            elif name_and_group[1] == "students":
                groups_list[1].append(name_and_group[0])
            elif name_and_group[1] == "teachers":
                groups_list[2].append(name_and_group[0])

    for group in groups_list:
        names = group[1:]
        names.sort()
        string_names = ""
        for i in range(len(names)):
            string_names += names[i]
            if i != (len(names) - 1):
                string_names += ","

        print group[0],",",string_names


if __name__ == '__main__':
    listMembers("Zlan admins\nbeth students\ncharlie TEachers\ndavid admins")