python hex to bytes string with code examples

Python provides several ways to convert a hexadecimal string to a bytes object.

One way is to use the bytes.fromhex() method, which converts a hexadecimal string to a bytes object.

Here is an example of using bytes.fromhex():

hex_string = "48656c6c6f20576f726c64"
bytes_object = bytes.fromhex(hex_string)
print(bytes_object) # b'Hello World'

Another way is to use the bytes() constructor with the bytearray.fromhex() method, which converts a hexadecimal string to a bytearray object, and then converts the bytearray object to a bytes object.

Here is an example of using the bytes() constructor with the bytearray.fromhex() method:

hex_string = "48656c6c6f20576f726c64"
bytearray_object = bytearray.fromhex(hex_string)
bytes_object = bytes(bytearray_object)
print(bytes_object) # b'Hello World'

You can also use the int() function in combination with hex and .to_bytes() method.

hex_string = "48656c6c6f20576f726c64"
bytes_object = int(hex_string, 16).to_bytes(len(hex_string)//2, byteorder='big')
print(bytes_object) # b'Hello World'

You can also use a list comprehension with int() and hex in combination with bytes() function.

hex_string = "48656c6c6f20576f726c64"
bytes_object = bytes([int(hex_string[i:i+2], 16) for i in range(0, len(hex_string), 2)])
print(bytes_object) # b'Hello World'

All these functions provide a way to convert a hexadecimal string to a bytes object in Python. The choice of which method to use will depend on the specific use case and the desired level of readability and efficiency.

In addition to converting hexadecimal strings to bytes objects, it is also common to need to convert bytes objects to hexadecimal strings.

One way to do this is to use the binascii.hexlify() function, which takes a bytes object as an argument and returns a hexadecimal string representation of the object. Here is an example:

import binascii
bytes_object = b'Hello World'
hex_string = binascii.hexlify(bytes_object)
print(hex_string) # b'48656c6c6f20576f726c64'

Another way to convert a bytes object to a hexadecimal string is to use the bytes.hex() method, which was introduced in Python 3.5. Here is an example:

bytes_object = b'Hello World'
hex_string = bytes_object.hex()
print(hex_string) # 48656c6c6f20576f726c64

You can also use a list comprehension with hex() function and bytes.join() to convert bytes object to hexadecimal string.

bytes_object = b'Hello World'
hex_string = ''.join(["%02x" % x for x in bytes_object])
print(hex_string) # 48656c6c6f20576f726c64

It is also possible to convert a bytes object to a hexadecimal string using string formatting. Here is an example:

bytes_object = b'Hello World'
hex_string = ''.join(["{:02x}".format(x) for x in bytes_object])
print(hex_string) # 48656c6c6f20576f726c64

It's important to note that the hexadecimal string representation of a bytes object will not include the leading 0x that is often used to indicate a hexadecimal number.

All these methods provide a way to convert a bytes object to a hexadecimal string in Python. The choice of which method to use will depend on the specific use case and the desired level of readability and efficiency.

In addition to this, In python, you can also use bin() function to convert a bytes object to its binary representation,

bytes_object = b'Hello World'
binary_string = ''.join(['{:08b}'.format(x) for x in bytes_object])
print(binary_string) # 0100100001100101011011000110110001101111 001001101110110111011001000110010001100101

In summary, python provides several ways to convert between hexadecimal strings, bytes objects, binary strings and vice versa, it's up to the developer to choose the most appropriate way for their use case.

Popular questions

1. What is the method in Python to convert a hexadecimal string to a bytes object?

• The bytes.fromhex() method can be used to convert a hexadecimal string to a bytes object.

2. How can you convert a bytes object to a hexadecimal string in Python?

• The binascii.hexlify() function can be used to convert a bytes object to a hexadecimal string.

3. Is there a method in python to convert bytes object to binary string ?

• Yes, in python you can use bin() function to convert a bytes object to its binary representation.

4. Can you convert hex string to bytes using bytes() function in python?

• Yes, You can use bytes() constructor with the bytearray.fromhex() method to convert a hexadecimal string to a bytes object.

5. Is there a way to convert bytes object to hex string using string formatting?

• Yes, it is possible to convert a bytes object to a hexadecimal string using string formatting by joining the hex representation of each byte using join() function.

Tag

Encoding/Decoding