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How to Create a Symmetric Array in Python

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 Here's a Python program that says to write a Symmetric array transformation. A top interview question. Symmetric Array Transformation Problem: Write a Python function that transforms a given array into a symmetric array by mirroring it around its center. For example: Input: [1, 2, 3] Output: [1, 2, 3, 2, 1] Hints: Use slicing for the reverse part. Concatenate the original array with its mirrored part. Example def symmetric_array(arr):     """     Transforms the input array into a symmetric array by mirroring it around its center.     Parameters:     arr (list): The input array.     Returns:     list: The symmetric array.     """     # Mirror the array by concatenating the original with its reverse (excluding the last element to avoid duplication)     return arr + arr[-2::-1] # Example usage input_array = [1, 2, 3] symmetric_result = symmetric_array(input_array) print("Input Array:", input_arr...
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Python Default Argument is Self Why do We Need it

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Python self as default argument, here is the reason. Below, you will find an example and the importance of self-argument.


python self as default argument

Structure of a class

The default argument is self. The self-argument states the function belongs to the class that we refer to here. Access to class members' details of one member to another is possible through self-argument. So self-argument is mandatory.


class <name of the class>:
def <function name>(<arguments>):
...
<members>


Self Argument

A python class consists of methods these also called functions. The default self-argument you need to supply in all the class methods .

Python class with self argument

class employee: 
    def getdata(self): 
         self.name=input('Enter name\t:') 
         self.age=input('Enter age\t:') 
   def putdata(self): 
         print('Name\t:',self.name)
         print('Age\t:',self.age) 

e1=employee() 
e1.getdata() 
e1.putdata()


Python class same code

Output from python class

Here, I have Imported my .py  module to the Python3 shell. It ran automatically. You may get syntax errors while importing, those you need to fix if any.


Here is list of commands to run Python class


References

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