Python 3 homework assistance

I’ll start by saying I have almost no experience with Python, and have been using the classes on this website to help me with my assignments. I apologize in advance if my questions are not clearly worded.

I need to create a method for a class that will count the number of credits a student has accumulated, and return that number as a float.

Below is the code for the class I have already created. The below code has passed the test in Mimir for my assignment:

class Course(object):

def __init__(self, title, year, semester, credits, grade):
    self.title = title
    self.year = year
    self.semester = semester
    self.credits = credits
    self.grade = grade

class StudentRecord(object):

def __init__(self, firstName, lastName, dob, hsName, hsCity, hsState, degree, address, transcript = [], newcourse = []):
    self.firstName = firstName
    self.lastName = lastName
    self.dob = dob
    self.hsName = hsName
    self.hsCity = hsCity
    self.hsState = hsState = degree
    self.address = address
    self.transcript = transcript
    self.newcourse = newcourse