pandas.isna() function in Python Last Updated : 14 Aug, 2020 Comments Improve Suggest changes Like Article Like Report This method is used to detect missing values for an array-like object. This function takes a scalar or array-like object and indicates whether values are missing (``NaN`` in numeric arrays, ``None`` or ``NaN`` in object arrays, ``NaT`` in datetimelike). Syntax : pandas.isna(obj) Argument : obj : scalar or array-like, Object to check for null or missing values. Below is the implementation of the above method with some examples : Example 1 : Python3 # importing package import numpy import pandas # string "deep" is not nan value print(pandas.isna("deep")) # numpy.nan represents a nan value print(pandas.isna(numpy.nan)) Output : False True Example 2 : Python3 # importing package import numpy import pandas # create and view data array = numpy.array([[1, numpy.nan, 3], [4, 5, numpy.nan]]) print(array) # numpy.nan represents a nan value print(pandas.isna(array)) Output : [[ 1. nan 3.] [ 4. 5. nan]] [[False True False] [False False True]] Create Quiz Comment D deepanshu_rustagi Follow 0 Improve D deepanshu_rustagi Follow 0 Improve Article Tags : Python Python-pandas Explore Python FundamentalsPython Introduction 2 min read Input and Output in Python 4 min read Python Variables 4 min read Python Operators 4 min read Python Keywords 2 min read Python Data Types 8 min read Conditional Statements in Python 3 min read Loops in Python - For, While and Nested Loops 5 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 3 min read Python MySQL 9 min read Python Packages 10 min read Python Modules 3 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 4 min read Matplotlib Tutorial 5 min read Python Seaborn Tutorial 3 min read StatsModel Library - Tutorial 3 min read Learning Model Building in Scikit-learn 6 min read TensorFlow Tutorial 2 min read PyTorch Tutorial 6 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 5 min read Build a REST API using Flask - Python 3 min read Building a Simple API with Django REST Framework 3 min read Python PracticePython Quiz 1 min read Python Coding Practice 1 min read Python Interview Questions and Answers 15+ min read Like