Unable to call function from another Python file

Question

I have Workflow.py file containing following function:

class Workflow:
    def Validation(self):
        return print ("Validation Process Started..")

I have another file Cron.py.

import schedule
import time
from Workflow import Validation

class Cron:

    def my_job(self):
        print('Foo')
        Workflow.Validation()

    def Start(self):
        schedule.every(2).to(4).seconds.do(self.my_job)
        while 1:
            schedule.run_pending()
            time.sleep(1)

A = Cron()
A.Start()

I am trying to call Validation() function present in Workflow.py from Cron.py file. Both of these files are places in same folder. But, the code is giving following exception:

Traceback (most recent call last):
 File "cron.py", line 3, in <module>
 from Workflow import Validation
 ImportError: cannot import name 'Validation'

Please can anyone help on resolving this error.

I think you are looking for from Workflow import Workflow which should fix it — MaLiN2223
– MaLiN2223, Commented Nov 22, 2019 at 21:55
Validation is not a top level function. It's a class method. Change your import to from Workflow import Workflow — mypetlion
– mypetlion, Commented Nov 22, 2019 at 21:55

Ofer Sadan · Accepted Answer · 2019-11-22 21:57:08Z

1

You have a Workflow class inside of a Workflow file which is why you're confused. There is no Validation to import, because Validation is inside of the class (and not the file)

The correct way would be:

from Workflow import Workflow

And then you could call it like this:

Workflow.Validation()

However, please note that this function is not a class method or a static method as it is defined right now. If that's how you want to call it, it should look like this:

class Workflow:
    @staticmethod
    def Validation():
        return print ("Validation Process Started..")

In general if your method doesn't use self or cls inside of it, it should be a static method

answered Nov 22, 2019 at 21:57

Ofer Sadan

12k6 gold badges42 silver badges66 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

RishiG Over a year ago

plus one for mentioning the class/static method issue

Aviad Rozenhek · Accepted Answer · 2019-11-22 22:01:48Z

0

this should work

import Workflow
flow = Workflow.Workflow()
flow.Validate()

ps. you should read about static methods, or avoid using classes unecessarily

edited Nov 22, 2019 at 22:01

answered Nov 22, 2019 at 21:57

Aviad Rozenhek

2,4493 gold badges28 silver badges44 bronze badges

1 Comment

Aviad Rozenhek Over a year ago

@OferSadan right, thanks! yeah I admit I answered it without putting through an interpreter :-|

Collectives™ on Stack Overflow

Unable to call function from another Python file

2 Answers 2

1 Comment

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related