API/Script

Thanks Sarah, Script has been corrected as advised.  

Now if I run the script I receive  the following error

>>> signature = base64.b64encode(hmac.new(AccessKey,msg=requestVars,digestmod=hashlib.sha256).hexdigest())
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\00098685\AppData\Local\Programs\Python\Python36-32\lib\hmac.py", line 144, in new
    return HMAC(key, msg, digestmod)
  File "C:\Users\00098685\AppData\Local\Programs\Python\Python36-32\lib\hmac.py", line 42, in __init__
    raise TypeError("key: expected bytes or bytearray, but got %r" % type(key).__name__)
TypeError: key: expected bytes or bytearray, but got 'str'