CODEWITHSUNDEEP
python
user1050619
user1050619

Reputation: 20856

Python class definition--import statement

I have defined 2 classes- Person & Manager. The Manager inherits the Person class. I get a error while trying to import the Person class..

Code is give below.

Person.py

class Person:
    def __init__(self, name, age, pay=0, job=None):
        self.name = name
        self.age  = age
        self.pay  = pay
        self.job  = job

    def lastname(self):
        return  self.name.split()[-1]

    def giveraise(self,percent):
        #return self.pay *= (1.0 + percent)
        self.pay *= (1.0 + percent)
        return self.pay

Manager.py

from Basics import Person

class Manager(Person):
    def giveRaise(self, percent, bonus=0.1):
        self.pay *= (1.0 + percent + bonus)        
        return self.pay

Error statements:

C:\Python27\Basics>Person.py

C:\Python27\Basics>Manager.py Traceback (most recent call last): File "C:\Python27\Basics\Manager.py", line 1, in from Basics import Person ImportError: No module named Basics

Why do I get the No module found error?

Upvotes: 2

Views: 13304

Answers (4)

user59634
user59634

Reputation:

from Basics import Person should be from Person import Person. You don't have a Basics.py module to import from.

Upvotes: 0

mgibsonbr
mgibsonbr

Reputation: 22007

You should look up how import and PYTHONPATH work. In your case, you can solve that using:

from Person import Person

I see you're coming from a Java background (where each file must have a class with the same name of the file), but that's not how Python modules work.

In short, when you run a Python script from the command line, as you did, it looks for modules (among other places) in your current dir. When you import a (simple) name like you did, Python will look for:

  1. A file named Basic.py; or:
  2. A folder named Basic with a file named __init__.py.

Then it will look for a definition inside that module named Person.

Upvotes: 7

icktoofay
icktoofay

Reputation: 129001

You defined the Person class in a file named Person.py. Therefore, you should import it like this:

from Person import Person

Note that it's the convention in Python to have lowercase module names. For example, rename Person.py to person.py and Manager.py to manager.py. Then you'd import the Person class like this:

from person import Person

If the person module is part of a package, you'd probably want to import like this:

from .person import Person

This will ease the transition to Python 3.

Upvotes: 3

Ignacio Vazquez-Abrams
Ignacio Vazquez-Abrams

Reputation: 798746

Because it's in Person.py, not Basics.py.

from Person import Person

Upvotes: 4

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