Python (Flask/SQLAlchemy) throwing NameError [duplicate]

Here are the two classes I've defined.

class Day(db.Model):
    __tablename__ = 'day'
    __table_args__ = {'extend_existing': True}
    id = db.Column(db.Integer, nullable = False, primary_key = True)
    name = db.Column(db.String(9), nullable = False)    
    #Foreign Keys
    function_id = db.Column(db.Integer, db.ForeignKey(Function.id))
    schedule_id = db.Column(db.Integer, db.ForeignKey(Schedule.id)) #Python wont recognize this for some reason...

class Schedule(db.Model):
    __tablename__ = 'schedule'
    __table_args__ = {'extend_existing': True}
    id = db.Column(db.Integer, nullable = False, primary_key = True)
    #Foreign Keys
    assigned_employee = db.Column(db.Integer, db.ForeignKey(Employee.id))    
    #Relationships
    days = db.relationship('Schedule', backref = 'day', lazy = True)

I'm using python in the command prompt to check the code and it seems to not recognize the Schedule class right below it.

Traceback (most recent call last):

File "models.py", line 1, in from main import db
File "Not\The\Actual\Path.py", line 9, in from views import *
File "Not\The\Actual\Path.py", line 2, in from models import *
File "Not\The\Actual\Path.py", line 48, in class Day(db.Model):
File "Not\The\Actual\Path.py", line 57, in Day schedule_id = db.Column(db.Integer, db.ForeignKey(Schedule.id)) #Python wont recognize this for some reason...
NameError: name 'Schedule' is not defined

It's perfectly fine with the 'function_id' line, but angry about the one right below it.