Why is my class method not printing anything in Python?

Question

I'm trying to define a class Book with a method display_info().
Here's my simplified code:
class Book:
def __init__(self, title):
self.title = title

def display_info(title):
print(title)

book1 = Book("1984")
book1.display_info()

But when I run it, nothing prints. What am I missing?

Answer 1

you need to use 'self'

class Book:
def __init__(self, title):
self.title = title

def display_info(self):
print(self.title)

book1 = Book("1984")
book1.display_info()

Answer 2

Use `self` in the first parameter.