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Python: Find the XOR of two given strings interpreted as binary numbers

Python Programming Puzzles: Exercise-25 with Solution

Write a Python program to find the XOR of two given strings interpreted as binary numbers.

Note: XOR represents the inequality function, i.e., the output is true if the inputs are not alike otherwise the output is false. A way to remember XOR is "must have one or the other but not both". XOR can also be viewed as addition modulo 2. As a result, XOR gates are used to implement binary addition in computers.

Input:
['0001', '1011']
Output:
0b1010

Input:
['100011101100001', '100101100101110']
Output:
0b110001001111

Pictorial Presentation:

Python: Find the XOR of two given strings interpreted as binary numbers.

Sample Solution-1:

Python Code:

#License: https://bit.ly/3oLErEI
def test(nums):
    return bin(int(nums[0],2) ^ int(nums[1],2))
nums =  ["0001", "1011"]
print("Original strings:")
print(nums)
print("XOR of two said strings interpreted as binary numbers:")
print(test(nums))
nums =  ["100011101100001", "100101100101110"]
print("\nOriginal strings:")
print(nums)
print("XOR of two said strings interpreted as binary numbers:")
print(test(nums))

Sample Output:

Original strings:
['0001', '1011']
XOR of two said strings interpreted as binary numbers:
0b1010

Original strings:
['100011101100001', '100101100101110']
XOR of two said strings interpreted as binary numbers:
0b110001001111

Flowchart:

Flowchart: Python - Find the XOR of two given strings interpreted as binary numbers.

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:


Sample Solution-2:

Python Code:

#License: https://bit.ly/3oLErEI

def test(nums):
    a, b = nums
    xor = int(a, 2) ^ int(b, 2)
    return bin(xor)[2:].zfill(len(a))

nums =  ["0001", "1011"]
print("Original strings:")
print(nums)
print("XOR of two said strings interpreted as binary numbers:")
print(test(nums))
nums =  ["100011101100001", "100101100101110"]
print("\nOriginal strings:")
print(nums)
print("XOR of two said strings interpreted as binary numbers:")
print(test(nums))

Sample Output:

Original strings:
['0001', '1011']
XOR of two said strings interpreted as binary numbers:
1010

Original strings:
['100011101100001', '100101100101110']
XOR of two said strings interpreted as binary numbers:
000110001001111

Flowchart:

Flowchart: Python - Find the XOR of two given strings interpreted as binary numbers.

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:


Python Code Editor :

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m