Converting Hexadecimal Strings to Bytes in Python
In Python, converting hexadecimal strings to bytes is a common task. Hex strings represent binary data in a human-readable format. This article will explore various methods to achieve this conversion effectively.
Method 1: Using bytearray.fromhex() (Recommended for Python 3 and 2.7)
bytearray.fromhex() directly converts a hexadecimal string into a bytearray object. The bytearray acts like a mutable array of bytes.
hex_string = "deadbeef" bytearray_object = bytearray.fromhex(hex_string)
This method provides a convenient solution for Python 2.7 and Python 3.
Method 2: Using bytes.fromhex() (Python 3 Only)
Similar to bytearray.fromhex(), Python 3 offers bytes.fromhex() to create a bytes object directly from a hex string. The bytes object is immutable and represents a sequence of immutable bytes.
hex_string = "deadbeef" bytes_object = bytes.fromhex(hex_string)
This method is recommended for Python 3 as it returns a more suitable type.
Method 3: Using String Decoding (Python 2.7 Only)
In Python 2.7, you can decode a hexadecimal string into a string using the decode() method with the "hex" argument.
hex_string = "deadbeef"
string_data = hex_string.decode("hex")
While this method does not create a bytearray or bytes object, it provides a workaround for older versions of Python.
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