Python Forum

Hello everyone, this is my first post on this (or any) forum. Python is my first programming language, and I am learning it on my own time as a hobby. I am using a couple of different books (Python Crash Course and Learn Python the Hard Way) to get started and working through the exercises as they come up. I am currently working with modules and classes. I keep getting a NameError that says "Self is not defined" and I'm not quite sure I understand why. My question is I'm not exactly sure what my error is and how to correct it (?) 

class Dog(object):
"""A simple attempt to model a dog."""
def __init__(self, name, age):
"""Initialize name and age attributes."""
self.name = name
self.age = age
def sit(self):
"""Simulate a dog sitting in response to a command."""
print(self.name.title() + " is now sitting.")
def roll_over(self): """Simulate rolling over in response to acommand."""
print(self.name.title() + " rolled over!")
my_dog = Dog('willie', 6)
print("My dog's name is " + my_dog.name.title() + ".")
print("My dog is " + str(my_dog.age) + " years old.")  

This produces: 

Error:
Traceback (most recent call last):
  File "dog.py", line 1, in <module>
    class Dog(object):
  File "dog.py", line 9, in Dog
    print(self.name.title() + " is now sitting.")
NameError: name 'self' is not defined

P.S. I apologize if I didn't word my question or problem correctly, or if there is a thread identical to this. I'm not totally sure how to begin asking something like this.  Thanks for any response!

Please, repost your code with proper indentation. Most probably that's the problem, but the code in your post does not produce this error

---

class Dog(object):
   """A simple attempt to model a dog."""
   def __init__(self, name, age):
       """Initialize name and age attributes."""
       self.name = name
       self.age = age
   def sit(self):
       """Simulate a dog sitting in response to a command."""
       print(self.name.title() + " is now sitting.")
   def roll_over(self):
       """Simulate rolling over in response to acommand."""
       print(self.name.title() + " rolled over!")
my_dog = Dog('willie', 6)
print("My dog's name is " + my_dog.name.title() + ".")
print("My dog is " + str(my_dog.age) + " years old.")

Output:
My dog's name is Willie.
My dog is 6 years old.

I guess it was an indentation error. I appreciate your help, after running and copying your indentations it did work. In my file I did have most of the indentations correct, I guess I just missed one.

Thanks again!