Hex to utf8 python

Convert Hex String to ASCII String in Python

Python hex to ASCII | The hexadecimal number system is a numeral system made up of 16 symbols. The hexadecimal number system is also known as hex. This system uses the decimal numbers (base 10) and six extra symbols (A to F). In hexadecimal no numerical symbols that represent If values greater than nine.

ASCII stands for American Standard Code for Information Interchange. It was developed by the ANSI (American National Standards Institute) and it is used to interchange the information from a high-level language to low-level language. Machine or Computer understand only binary languages. So, the character data type represents integers. For example, the ASCII value of the letter ‘A’ is 65.

We will discuss how to convert hex string to ASCII string in python. The string is written in hexadecimal form “0x68656c6c6f” and we want to convert it into an ASCII character string which will be hello as h is equal to 68 in ASCII code, e is 65, l is 6c and o is 6f.

We will take a hexadecimal value string as input. Then, convert hexadecimal value string to their corresponding ASCII format string and extract all characters. Finally, the ASCII string will be displayed on the screen.

Python Program to Convert Hex to ASCII

The bytes.fromhex() function convert hex to the byte in python. This function accepts a single hexadecimal value argument and converts it into a byte array first. The decode() method takes a byte array as input and decodes it. Use the slicing notation hex_str[2:] to remove “0x” from a hexadecimal string.

# Python program to convert hex string to ASCII string # take hexadecimal string hex_str = "0x68656c6c6f"[2:] # convert hex string to ASCII string bytes_array = bytes.fromhex(hex_str) ascii_str = bytes_array.decode() # printing ASCII string print('ASCII String:', ascii_str)

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Python Hex to String

The representation of data in Hexadecimal is commonly used in computer programming. It is used to represent binary data in a human-readable form, as understanding the machine language (i.e., Binary) is difficult for humans. Hexadecimal notation is used in networking protocols, e.g., IPv6 and cryptography, and widely used in graphics, e.g. to represent numbers. Note that hexadecimal uses 16 digits, including 0-9 and A-F , to represent numbers.

Considering the importance of hexadecimal, some programming languages and APIs require string representation of binary data. As a lot of data is in hexadecimal form, so we need to convert the hexadecimal number to a string. This conversion helps to display and manipulate the binary data as text , which makes the task more convenient for humans.

In python language, the hexadecimal can be converted into a string using the following:

• bytes.fromhex() method
• binascii module
• codecs module
• List comprehension

Let’s take a hexadecimal string, 48656c6c6f20576f726c64 ; this hexadecimal string represents the Hello World string. Below, the hexadecimal string is converted using different methods.

Using bytes.fromhex() Method

Use the bytes.fromhex() method to convert a hexadecimal string to a simple string in Python.

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Convert Hex to ASCII in Python

1. Convert Hex to ASCII in Python Using the decode() Method
2. Convert Hex to ASCII in Python Using the codecs.decode() Method

This tutorial will look into various methods to convert a hexadecimal string to an ASCII string in Python. Suppose we have a string written in hexadecimal form 68656c6c6f and we want to convert it into an ASCII character string which will be hello as h is equal to 68 in ASCII code, e is 64 , l is 6c and o is 6f .

We can convert a hexadecimal string to an ASCII string in Python using the following methods:

Convert Hex to ASCII in Python Using the decode() Method

The string.decode(encoding, error) method in Python 2 takes an encoded string as input and decodes it using the encoding scheme specified in the encoding argument. The error parameter specifies the error handling schemes to use in case of an error that can be strict , ignore , and replace .

Therefore, to convert a hex string to an ASCII string, we need to set the encoding parameter of the string.decode() method as hex . The below example code demonstrates how to use the string.decode() method to convert a hex to ASCII in Python 2.

string = "68656c6c6f" string.decode("hex") 

In Python 3, the bytearray.decode(encoding, error) method takes a byte array as input and decodes it using the encoding scheme specified in the encoding argument.

To decode a string in Python 3, we first need to convert the string to a byte array and then use the bytearray.decode() method to decode it. The bytearray.fromhex(string) method can be used to convert the string into a byte array first.

The below example code demonstrates how to use the bytearray.decode() and bytearray.fromhex(string) method to convert a hex string to ASCII string in Python 3:

string = "68656c6c6f" byte_array = bytearray.fromhex(string) byte_array.decode() 

Convert Hex to ASCII in Python Using the codecs.decode() Method

The codecs.decode(obj, encoding, error) method is similar to decode() method. It takes an object as input and decodes it using the encoding scheme specified in the encoding argument. The error argument specifies the error handling scheme to be used in case of an error.

In Python 2, the codecs.decode() returns a string as output, and in Python 3, it returns a byte array. The below example code demonstrates how to convert a hex string to ASCII using the codecs.decode() method and convert the returned byte array to string using the str() method.

import codecs  string = "68656c6c6f" binary_str = codecs.decode(string, "hex") print(str(binary_str,'utf-8')) 

Related Article — Python ASCII

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How to Convert a String From Hex to ASCII in Python?

Hex to ASCII conversion in Python | The hexadecimal number system is a 16-symbol numerical system. Hexadecimal is another name for the hexadecimal numeral system. This system employs decimal numbers (base 10) as well as six additional symbols (A to F). There are no numerical symbols in hexadecimal that represent values larger than nine.

What are the ASCII and Hexadecimal?

The American Standard Code for Information Interchange (ASCII) is an acronym for American Standard Code for Information Interchange. It was created by the American National Standards Institute (ANSI) and is used to transfer data from a high-level language to a low-level language. Only binary languages are understood by machines or computers. Integers are represented using the character data type. The ASCII value of the letter ‘A,’ for example, is 65.

In this tutorial, we’ll look at how to convert a hex string to an ASCII string in Python. The text is written in the hexadecimal form “0x68656c6c6f” and we want to convert it to an ASCII character string that will be hello since h equals 68 in ASCII code, e equals 65, l equals 6c, and o equals 6f.

As input, we’ll use a hexadecimal value string. Then extract all characters by converting hexadecimal value strings to their equivalent ASCII format strings. The ASCII string will be displayed on the screen at the end.

Converting Hex to ASCII in Python

You can also use the online hex to ASCII converter to transform your hexadecimal values into ASCII characters. Further, we have given the three different methods of conversion by using the python program.

The bytes.fromhex() function convert hex to the byte in python. This function accepts a single hexadecimal value argument and converts it into a byte array first. The decode() method takes a byte array as input and decodes it. Use the slicing notation hex_str[2:] to remove “0x” from a hexadecimal string.

# Program to convert the hex string into the ascii code # take hexadecimal string hex_str = "0x68656c6c6f"[2:] # convert hex string to ASCII string bytes_array = bytes.fromhex(hex_str) ascii_str = bytes_array.decode() # print ASCII string print('ASCII String:', ascii_str)

Output: ASCII String: hello

2. Python Program to Convert From hex to ASCII

The codecs.decode(obj, encoding, error) method decodes an object using the encoding scheme supplied in the encoding parameter. In the event of an error, the error argument defines the error handling scheme to be utilized. The str() method converts the byte array returned to a string.

# 2nd Python program to convert hex string to ASCII # importing codecs.decode() import codecs # take hexadecimal string hex_str = '0x68656c6c6f'[2:] # convert hex string to ASCII string binary_str = codecs.decode(hex_str, 'hex') ascii_str = str(binary_str,'utf-8') # printing ASCII string print('ASCII String:', ascii_str)

Output: ASCII String: hello

3. Python Program to convert the hex string to ASCII

The codecs.decode(obj, encoding, error) method decodes an object using the encoding scheme supplied in the encoding parameter. In the event of an error, the error argument defines the error handling scheme to be utilized. The str() method converts the byte array returned to a string.

# 3rd Python program to convert hex string to ASCII string # take hexadecimal string hex_str = '0x68 0x65 0x6c 0x6c 0x6f' # convert hex string to ASCII string string = ''.join(chr(int(i, 16)) for i in hex_str.split()) # printing ASCII string print('ASCII String:', string)

Output: ASCII String: hello

Summary:

Now you are witnessed that this topic is not difficult. Once you grab the knowledge of this article, you can easily solve the problems related to this topic. Hex to ASCII is a pretty conceptual article.

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