x = [pair.lstrip().strip("'").split(' ') for pair in mystring.split(',')]
# gives: [['34.894127', '29.761515'], ['32.323574', '30.166336'], ['32.677296', '31.961439'], ['35.298668', '31.559237'], ['34.894127', '29.761515']]

x = tuple([tuple(pair.lstrip().strip("'").split(' ')) for pair in mystring.split(',')])
# gives: (('34.894127', '29.761515'), ('32.323574', '30.166336'), ('32.677296', '31.961439'), ('35.298668', '31.559237'), ('34.894127', '29.761515'))

coordinates = [map(float, x.replace("'", '').split()) for x in my_string.split(',')]