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numpy.base_repr() in Python

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  • Last Updated : 29 Nov, 2018

numpy.base_repr(number, base=2, padding=0) function is used to return a string representation of a number in the given base system.

For example, decimal number 10 is represented as 1010 in binary whereas it is represented as 12 in octal.

Syntax : numpy.base_repr(number, base=2, padding=0)

Parameters :
number : Input number. Only an integer decimal number can be used as input.
base : [int, optional] Convert number to the base number system. The valid range is 2-36, the default value is 2.
padding : [int, optional] To add number of zeroes on the left. Default is 0.

Return : String representation of the input number in base system.

Code #1 : Working




# Python program explaining
# base_repr() function
  
import numpy as geek
in_num = 10
  
print ("Input  number : ", in_num)
  
out_num = geek.base_repr(in_num, base = 2, padding = 0
print ("binary representation of 10 : ", out_num) 

Output :

Input  number :  10
binary representation of 10 :  1010

 
Code #2 :




# Python program explaining
# base_repr() function
import numpy as geek
  
in_arr = [5, -8, 21 ]
   
print ("Input array : ", in_arr) 
print()
  
# binary representation of first array  
# element without using padding parameter
out_num = geek.base_repr(in_arr[0], base = 2)
print("binary representation of 5")
print ("Without using padding parameter : ", out_num) 
  
# binary representation of first array
# element using padding parameter
out_num = geek.base_repr(in_arr[0], base = 2, padding = 3)
print ("Using padding parameter: ", out_num)
print()
  
# octal representation of 2nd array
# element without using width parameter
out_num = geek.base_repr(in_arr[1], base = 8, padding = 0)
print("octal representation of -8")
print ("Without using padding parameter : ", out_num) 
  
# octal representation of 2nd array
# element  using padding parameter
out_num = geek.base_repr(in_arr[1], base = 8, padding = 4)
print ("Using padding parameter : ", out_num) 
print()
  
# hexa-decimal representation of 3rd array
# element without using padding parameter
out_num = geek.base_repr(in_arr[2], base = 16, padding = 0)
print("hexa-decimal representation of 21")
print ("Without using padding parameter : ", out_num) 
  
# hexa-decimal representation of 3rd array
# element  using padding parameter
out_num = geek.base_repr(in_arr[2], base = 16, padding = 3)
print ("Using padding parameter : ", out_num) 

Output :

Input array :  [5, -8, 21]

binary representation of 5
Without using padding parameter :  101
Using padding parameter:  000101

octal representation of -8
Without using padding parameter :  -10
Using padding parameter :  -000010

hexa-decimal representation of 21
Without using padding parameter :  15
Using padding parameter :  00015

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