**`binascii`** is a widely used Python library for ASCII-encoded binary representations. It contains several methods for converting to binary from ASCII or hex, and vice versa. 

**`binascii.unhexlify`** is a method in the `binascii` library. It returns the binary string that is represented by any hexadecimal string.

The function `unhexlify` works opposite of the method [b2a_hex()](https://www.kite.com/python/docs/binascii.b2a_hex), or `hexlify`. 

> The data being converted must contain an even number of hex digits; otherwise it raises `TypeError`.  







import binascii

# simple command to see how unhexlify works
# hex value of A is 41
print(binascii.unhexlify('41'))

# data
x = "Hello"
# first convert string to bytes
res = bytes(x, 'utf-8')
# convert to hex
w = binascii.hexlify(res)
# unhexlify the hex
print(binascii.unhexlify(w))




What is binascii.unhexlify in Python?

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