# Python hex()

Published on August 3, 2022

Pankaj

Python hex() function is used to convert an integer to a lowercase hexadecimal string prefixed with “0x”. We can also pass an object to hex() function, in that case the object must have `__index__()` function defined that returns integer. The input integer argument can be in any base such as binary, octal etc. Python will take care of converting them to hexadecimal format.

## Python hex() example

Let’s look into some simple examples of converting integer to hexadecimal number.

``````print(hex(255))  # decimal
print(hex(0b111))  # binary
print(hex(0o77))  # octal
``````

Output:

``````0xff
0x7
0x3f
0xff
``````

## Python hex() with object

Let’s create a custom class and define __index__() function so that we can use hex() function with it.

``````class Data:
id = 0

def __index__(self):
print('__index__ function called')
return self.id

d = Data()
d.id = 100

print(hex(d))
``````

Output:

``````__index__ function called
0x64
``````

You can checkout complete python script and more Python examples from our GitHub Repository.

Reference: Official Documentation

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Pankaj

author

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