Python Coding Challange - Question With Answer(01300125)

 

Code Analysis:

class Number:
    integers = [5, 6, 7]
    for i in integers:
        i * 2
print(Number.i)

1. Defining the Number class:

   • The Number class is created, and a class-level attribute integers is defined as a list: [5, 6, 7].

2. for loop inside the class body:

   • Inside the class body, a for loop iterates over each element in the integers list.
   • For each element i, the expression i * 2 is executed. However:
     • This operation (i * 2) does not store or assign the result anywhere.
     • It simply calculates the value but does not affect the class or create new attributes.
   • The variable i exists only within the scope of the for loop and is not stored as a class attribute.
3. print(Number.i):
   • After the class definition, the code attempts to access Number.i.
   • Since the variable i was used only in the loop and was never defined as an attribute of the Number class, this will raise an AttributeError:

     python
     AttributeError: type object 'Number' has no attribute 'i'

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Key Points:

• Variables in a for loop inside a class body are temporary and are not automatically added as class attributes.
• To make i an attribute of the class, you must explicitly assign it, like so:

  
  class Number:
      integers = [5, 6, 7]
      for i in integers:
          result = i * 2 # This only calculates the value
          last_value = i # Assigns the last value to a class attribute
  
  print(Number.last_value) # Outputs: 7
  

  Here, last_value would be accessible as an attribute of the class.