def parse_dict(d):
    """
    Given a single layer dictionary d, return a string representation
    of the form "key1=val1,key2=val2,..."

        d (dict): Any dictionary, preferrably with no nesting

        returns (str): String represenation of d described above
    """
    return ",".join([str(key)+"="+str(value) for key, value in d.items()])