Question

I have problem with casting in python.

I have a method in file module_A.py:

import Common.Models.Pax as Pax

def verify_passangers_data(self,paxes):
    for i in range(len(paxes)):
         pax=paxes[i]

Here is my Pax.py

class Pax:
    """"""

    #----------------------------------------------------------------------
    def __init__(self):
        """Constructor"""
    #----------------------------------------------------------------------



class Adult(Pax):

    def __init__(self,last_day_of_travel,first_name,last_name,nationality,address=None):
        self.birth_day=datetime.today() - timedelta(days = random.randrange(6563, 20793-(date.today()-last_day_of_travel).days))
        self.first_name=first_name
        self.last_name=last_name
        self.nationality=nationality
        self.address=address

This is how I create collection in another module(module_C.py):

paxes=[]
        paxes.append(Pax.Adult(last_day_of_travel,'FirstName','LastName',Nationality.Poland,DataRepository.addresses['Default']))

but, look at my output from debug probe (in wing ide)

>>> type(pax)
<class 'Common.Models.Pax.Adult'>
>>> pax is Common.Models.Pax.Adult
Traceback (most recent call last):
  File "<string>", line 1, in <fragment>
builtins.NameError: name 'Common' is not defined

How can I check is pax is instance of Adult?

Answer 1

How can I check is pax is instance of Adult?

Use the isinstance function:

isinstance(pax, Common.Models.Pax.Adult)

Make you have imported the class, though (e.g., import Common.Models.Pax).

(Although purists would argue that there’s rarely a need to check the type of a Python object. Python is dynamically typed, so you should generally check to see if an object responds to a particular method call, rather than checking its type. But you may have a good reason for needing to check the type, too.)