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Python Program to Generate Gray Codes using Recursion
When it is required to generate gray codes with the help of recursion, a method is defined, that creates an empty list and appends values 0 and 1 to it. Multiple ‘for’ loops are used to generate the gray code within the function.
Below is the demonstration of the same −
Example
import math as mt
def generate_gray_list(my_val):
if (my_val <= 0):
return
my_list = list()
my_list.append("0")
my_list.append("1")
i = 2
j = 0
while(True):
if i >= 1 << my_val:
break
for j in range(i - 1, -1, -1):
my_list.append(my_list[j])
for j in range(i):
my_list[j] = "0" + my_list[j]
for j in range(i, 2 * i):
my_list[j] = "1" + my_list[j]
i = i << 1
for i in range(len(my_list)):
print(my_list[i])
my_num = 3
print("The number is :")
print(my_num)
print("Method to convert gray code to binary is being called...")
generate_gray_list(my_num)Output
The number is : 3 Method to convert gray code to binary is being called... 000 001 011 010 110 111 101 100
Explanation
The required packages are imported.
A method is defined, that creates an empty list.
It appends 0 and 1 to the list.
Multiple ‘for’ loops are used to iterate within the range of 0 and 2.
The left shift operator is used on the iterator and compared with the number.
Outside the method, it is called by passing relevant parameter.
The output is displayed on the console.
Updated on: 19-Apr-2021
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