numpy.unpackbits() in Python Last Updated : 21 Feb, 2019 Comments Improve Suggest changes Like Article Like Report numpy.unpackbits() is another function for doing binary operations in numpy. It is used to unpacks elements of a uint8 array into a binary-valued output array. Syntax : numpy.unpackbits(arr, axis=None) Parameters : arr : [array_like ndarray] An uint8 type array whose elements should be unpacked. axis : The dimension over which unpacking is done.If none then unpacking is done in flattened array. Return : [unpacked ndarray] Array of type uint8 whose elements are binary-valued (0 or 1). Code #1 : Python3 # Python program explaining # numpy.unpackbits() function # importing numpy import numpy as geek # creating input array using # array function in_arr = geek.array([171, 16], dtype = geek.uint8) print ("Input array : ", in_arr) # unpacking elements of an array # using unpackbits() function out_arr = geek.unpackbits(in_arr) print ("Output unpacked array : ", out_arr) Output : Input array : [171 16] Output unpacked array : [1 0 1 0 1 0 1 1 0 0 0 1 0 0 0 0] Code #2 : Python3 # Python program explaining # numpy.unpackbits() function # importing numpy import numpy as geek # creating input array using # array function in_arr = geek.array([[ 64, 128], [ 17, 25]], dtype = geek.uint8) print ("Input array : ", in_arr) # unpacking elements of an array # using unpackbits() function out_arr = geek.unpackbits(in_arr, axis = 0) print ("Output unpacked array along axis 0 : ", out_arr) Output : Input array : [[ 64 128] [ 17 25]] Output unpacked array along axis 0 : [[0 1] [1 0] [0 0] [0 0] [0 0] [0 0] [0 0] [0 0] [0 0] [0 0] [0 0] [1 1] [0 1] [0 0] [0 0] [1 1]] Comment More info J jana_sayantan Follow Improve Article Tags : Python Python-numpy Python numpy-Binary Operation Explore Python FundamentalsPython Introduction 3 min read Input and Output in Python 4 min read Python Variables 5 min read Python Operators 5 min read Python Keywords 2 min read Python Data Types 7 min read Conditional Statements in Python 3 min read Loops in Python - For, While and Nested Loops 6 min read Python Functions 5 min read Recursion in Python 4 min read Python Lambda Functions 5 min read Python Data StructuresPython String 5 min read Python Lists 4 min read Python Tuples 4 min read Python Dictionary 3 min read Python Sets 6 min read Python Arrays 7 min read List Comprehension in Python 4 min read Advanced PythonPython OOP Concepts 11 min read Python Exception Handling 5 min read File Handling in Python 4 min read Python Database Tutorial 4 min read Python MongoDB Tutorial 2 min read Python MySQL 9 min read Python Packages 12 min read Python Modules 7 min read Python DSA Libraries 15 min read List of Python GUI Library and Packages 3 min read Data Science with PythonNumPy Tutorial - Python Library 3 min read Pandas Tutorial 6 min read Matplotlib Tutorial 5 min read Python Seaborn Tutorial 15+ min read StatsModel Library- Tutorial 4 min read Learning Model Building in Scikit-learn 8 min read TensorFlow Tutorial 2 min read PyTorch Tutorial 7 min read Web Development with PythonFlask Tutorial 8 min read Django Tutorial | Learn Django Framework 7 min read Django ORM - Inserting, Updating & Deleting Data 4 min read Templating With Jinja2 in Flask 6 min read Django Templates 7 min read Python | Build a REST API using Flask 3 min read How to Create a basic API using Django Rest Framework ? 4 min read Python PracticePython Quiz 3 min read Python Coding Practice 1 min read Python Interview Questions and Answers 15+ min read Like