How to Check Data Type in Python?


In this blog post, we will be discussing how to check data types in Python. This is an important concept to understand because it will help you optimize your code and avoid errors. We will be covering the following topics:

What is data type?

In Python, everything is an object, and each object has a specific data type. The data type defines the operations that can be performed on the object and the way the object is stored in memory. Some of the most common data types in Python are integers, floats, strings, lists, tuples, dictionaries, and sets.

Why is it important to check data type?

It is important to check data types because it can help you avoid errors in your code. For example, if you are trying to perform mathematical operations on a string, you will get an error because strings cannot be converted to numbers. By checking the data type before attempting any operations, you can avoid these errors.

How to check data type in Python?

There are two ways to check the data type of an object in Python: using the type() function or using the isinstance() function. Let’s take a closer look at each method.

The type() function returns the data type of an object as a string. For example, if we have a variable x that contains the value 7, we can use the following code to check the data type of x:

x = 7 print(type(x)) The output would be: int
Code language: PHP (php)

Write a Python program to show how different types of numerical data can be used.

a = 4 print(a, "is of type", type(a)) a = 3.0 print(a, "is of type", type(a)) a = 1+3j print(a, "is complex number?", isinstance(1+3j, complex)) #output: # 4 is of type <class 'int'> # 3.0 is of type <class 'float'> # (1+3j) is complex number? True
Code language: PHP (php)

Checking Data Type Using isinstance() Function

The isinstance() function checks if an object is of a given data type. It takes two arguments: the object and the data type you want to check against. If the object is of the specified data type, it returns True; otherwise, it returns False.

For example, let’s say we have a variable y that contains the value “8” (a string). We can use the following code to check if y is a string:

y = “8print(isinstance(y, str)) #The output would be: True
Code language: PHP (php)

In this blog post, we discussed how to check data types in Python. We covered two methods: using the type() function and using the isinstance() function. We also discussed why it is important to check data types before performing any operations on objects.

Andy Avery

I really enjoy helping people with their tech problems to make life easier, ​and that’s what I’ve been doing professionally for the past decade.

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