Introduction to Python functions: usage and examples of type function

Introduction to Python functions: Usage and examples of type function

Python is a powerful and flexible programming language that provides many built-in functions to help us write more efficient code. One of the very useful functions is the type() function. The type() function can help us determine the type of an object and return the name of the type. In this article, we will introduce the basic usage and examples of the type() function.

The syntax of the type() function is as follows:

type(object)

Among them, object is the object whose type is to be checked.

The type() function returns a type object, which represents the type of the object parameter. For example, if we have a string "Hello World", we can use the type() function to confirm its type:

a = 'Hello World'
print(type(a))

Output:

<class 'str'>

The type() function has many uses. Here are some common examples:

Example 1: Checking the type of a value

a = 5
b = 5.0
c = '5'
d = [1, 2, 3, 4, 5]
e = {'one': 1, 'two': 2, 'three': 3}

print('a is', type(a))
print('b is', type(b))
print('c is', type(c))
print('d is', type(d))
print('e is', type(e))

Output:

a is 
b is 
c is <class 'str'>
d is 
e is 

Example 2: Checking the type of a function

def add_numbers(a, b):
    return a + b

print(type(add_numbers))

Output:

<class 'function'>

Example 3: Checking the type of a module

import math

print(type(math))

Output:

<class 'module'>

Example 4: Checking the type of a class

class Animal:
    def __init__(self, name):
        self.name = name

dog = Animal('Dog')

print(type(dog))

Output:

<class '__main__.Animal'>

Finally, it should be noted that the type() function should not be used to check whether an object is callable. If you need to check whether an object is callable, you can use the callable() function.

Summary:

The type() function provides a quick way to check the type of a Python object. It can be applied to common Python data types such as integers, floating point numbers, strings, lists, etc. At the same time, it can also check the types of functions, modules and classes. This flexibility makes type() one of the most useful functions in Python.

The above is the detailed content of Introduction to Python functions: usage and examples of type function. For more information, please follow other related articles on the PHP Chinese website!