Create an instance in a class in python

Question

I am trying to create a new instance of a class in Python. I tried the solution here: Instances in python

But it didn't work. So, my main class I have

if __name__ == '__main__':
    Tim = Person
    movement = Person.walk()

Where "Person" is the name of the class that I want to create and instance of. It has methods that I want to use.

I keep getting this error though:

Undefined Variable:Person

I also tried declaring the class instance within the actual metho, not init, but I got the same error.

Any suggestions are welcome. thanks

Answer 1

You just need to add some parenthesis:

Tim = Person()

This tells python to access the constructor.

The code you provided though tells me you may not have a class Person defined. Your code should have a class Person defined.

class Person:
    def walk(self):
        print "I'm walking!"

if __name__ == "__main__":
    Time = Person
    movement = Person.walk()
    print movement

or you need a call to import the class Person

from my_other_python_file import Person

if __name__ == "__main__":
    Time = Person
    movement = Person.walk()
    print movement

Answer 2

Correction: please use bracket after class if you want to create an instance of that class and use that instance to call the method inside the class.

if __name__ == '__main__':
    Tim = Person()
    movement = Tim.walk()

OR but less recommended

if __name__ == '__main__':
    movement = Person().walk()

Answer 3

You need to have parenthesis to call the constructor.

Tim = Person()

As you have it now, Tim = Person is interpreted as assign Tim the value of the variable Person which hasn't been defined.