call an instance of a class in the interactive

call an instance of a class in the interactive - Printable Version

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call an instance of a class in the interactive - nzcan - Aug-23-2018

hello,
I have created a class 'User':

class User:
      def __init__(self, name, gender, age):
            self.name = name
            self.gender = gender
            self.age = age
            
      def __call__(self, name, gender, age):
            print(name)
            print(gender)
            print(age)
      

user1 = User('dany wasser', 'gender: male', 21)

I put this class in a file called saty.py
then I imported the file 'saty.py' in the interactive mode of the interpreter by:
import saty
the file was successfully imported.
now I want to call the single instance of this class 'user1' with all its attributes into the interactive mode of the interpreter. how can I do this?
>>> print ... ?

thanks in advance

RE: call an instance of a class in the interactive - Gribouillis - Aug-23-2018

If you only want to call the instance, you simply do

>>> user1()

However, being callable is an uncommon feature for a class representing a user. In this case one would more traditionally define a conversion to string with a __str__() method.

class User:
      def __init__(self, name, gender, age):
            self.name = name
            self.gender = gender
            self.age = age
             
      def __str__(self):
            return "User({!r}, {!r}, {!r})".format(
                  self.name, self.gender, self.age)

 
user1 = User('dany wasser', 'gender: male', 21)

Then you could simply do

>>> print(user1)

The method could also be named __repr__() in this case in order to be called if some code asks for repr(user1).

RE: call an instance of a class in the interactive - buran - Aug-23-2018

you will usei
saty.user1 to reference name user1 from saty.py after this import.

Now there are other problems with your class. For example you don't need this __call__ function. For this class it doesn't make sense it to be callable. If you want to create nice printable representation of the class, you will use __str__. There is also another special method - __repr__ which you may want to implementit's bit different.

class User:
    def __init__(self, name, gender, age):
        self.name = name
        self.gender = gender
        self.age = age
             
    def __str__(self):
        return 'User {}, gender: {}, age: {}'.format(self.name, self.gender, self.age)

    def __repr__(self):
        return 'User object: (id: {}, name: {}, gender: {}, age: {})'.format(id(self), self.name, self.gender, self.age)
       
 
user1 = User('dany wasser', 'gender: male', 21)

Output:>>> import saty
>>> saty.user1
User object: (id: 139691134272064, name: dany wasser, gender: gender: male, age: 21)
>>> print(saty.user1)
User dany wasser, gender: gender: male, age: 21
>>>

RE: call an instance of a class in the interactive - nzcan - Aug-23-2018

(Aug-23-2018, 06:37 AM)Gribouillis Wrote: If you only want to call the instance, you simply do
>>> user1()
However, being callable is an uncommon feature for a class representing a user. In this case one would more traditionally define a conversion to string with a __str__() method.
class User:
      def __init__(self, name, gender, age):
            self.name = name
            self.gender = gender
            self.age = age
             
      def __str__(self):
            return "User({!r}, {!r}, {!r})".format(
                  self.name, self.gender, self.age)

 
user1 = User('dany wasser', 'gender: male', 21)
Then you could simply do
>>> print(user1)
The method could also be named __repr__() in this case in order to be called if some code asks for repr(user1).

it works excellent!
thanks a lot!

(Aug-23-2018, 06:37 AM)buran Wrote: you will usei
saty.user1 to reference name user1 from saty.py after this import.

Now there are other problems with your class. For example you don't need this __call__ function. For this class it doesn't make sense it to be callable. If you want to create nice printable representation of the class, you will use __str__. There is also another special method - __repr__ which you may want to implementit's bit different.
class User:
    def __init__(self, name, gender, age):
        self.name = name
        self.gender = gender
        self.age = age
             
    def __str__(self):
        return 'User {}, gender: {}, age: {}'.format(self.name, self.gender, self.age)

    def __repr__(self):
        return 'User object: (id: {}, name: {}, gender: {}, age: {})'.format(id(self), self.name, self.gender, self.age)
       
 
user1 = User('dany wasser', 'gender: male', 21)
Output:>>> import saty
>>> saty.user1
User object: (id: 139691134272064, name: dany wasser, gender: gender: male, age: 21)
>>> print(saty.user1)
User dany wasser, gender: gender: male, age: 21
>>>

very sophisticated version!
thanks a lot!