Python | Ways to convert hex into binary

Conversion of hex to binary is a very common programming question. In this article, we will see a few methods to solve the above problem.

Method #1: Using bin and zfill

# Python code to demonstrate  
# conversion of a hex string 
# to the binary string 
  
# Initialising hex string 
ini_string = "1a"
scale = 16
  
# Printing initial string 
print ("Initial string", ini_string) 
  
# Code to convert hex to binary 
res = bin(int(ini_string, scale)).zfill(8) 
  
# Print the resultant string 
print ("Resultant string", str(res)) 

Output:

Initial string 1a
Resultant string 00b11010

Method #2: Using Naive Method

# Python code to demonstrate  
# conversion of hex string 
# to binary string 
  
import math 
  
# Initialising hex string 
ini_string = "1a"
  
# Printing initial string 
print ("Initial string", ini_string) 
  
# Code to convert hex to binary 
n = int(ini_string, 16)  
bStr = '' 
while n > 0: 
    bStr = str(n % 2) + bStr 
    n = n >> 1    
res = bStr 
  
# Print the resultant string 
print ("Resultant string", str(res)) 

Output:

Initial string 1a
Resultant string 11010

Method #3: Using .format

# Python code to demonstrate  
# conversion of hex string 
# to binary string 
  
import math 
  
# Initialising hex string 
ini_string = "1a"
  
# Printing initial string 
print ("Initial string", ini_string) 
  
# Code to convert hex to binary 
res = "{0:08b}".format(int(ini_string, 16)) 
  
# Print the resultant string 
print ("Resultant string", str(res)) 

Output:

Initial string 1a
Resultant string 00011010

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