import base64


def hex_to_b64(in_str):
    return base64.b64encode(bytes.fromhex(in_str))

if __name__ == '__main__':
    print(hex_to_b64(
        '49276d206b696c6c696e6720796f757220627261696e206c696b65206120706f69736f6e6f7573206d757368726f6f6d'))
