Removed hardcoded tuples as default parameters.
Removed hardcoded tuples as default parameters.

BigFlySports/python-amazon-mws,Bobspadger/python-amazon-mws,GriceTurrble/python-amazon-mws,juokaz/python-mws-sdk,bpipat/mws,hairyjerry/python-amazon-mws,czpython/python-amazon-mws,ziplokk1/python-amazon-mws,jameshiew/mws,bloodywing/python-amazon-mws