def __init__(self, name, value=None):
self._type = "<STR_LIT>"        <EOL>self._name = name<EOL>self._value = value<EOL>
Constructor.

:param name: The name of the column in the data
    view to which this constraint should be applied
:type name: str
:param value: The value the column should be constrained to
:type value: float