Added import

[arjunsinghy96]

added import print_function that is compatible with both python2 and python3

[jayvdb]

Not particularly useful; python3 output:

Traceback (most recent call last):
  File "Set-1/HexToBase64.py", line 5, in <module>
    hex = h.decode("hex")
AttributeError: 'str' object has no attribute 'decode'

[arjunsinghy96]

@jayvdb I didn't get any response(It was a hacktober thing). It's great to have your input. Learned something new.