def _validate(self, value):
"""Validate that the value is of the correct type."""
if type(value) is _Types.Length:
return value._convert_to(self._unit)
else:
# Extract the value and unit from the argument string.
value, unit = _validate_unit_requirement(value, "length")
if unit is None:
return _Types.Length(value, self._unit)
else:
return _Types.Length(value, unit)._convert_to(self._unit)
def __init__(self,
help=None,
default=None,
unit=None,
minimum=None,
maximum=None,
allowed=None):
"""Constructor.
Parameters
----------
help : str
The help string.
default : :class:`Length <BioSimSpace.Types.Length>`
The default value.
unit : str
The unit.
minimum : :class:`Length <BioSimSpace.Types.Length>`
The minimum allowed value.
maximum : :class:`Length <BioSimSpace.Types.Length>`
The maximum allowed value.
allowed : [:class:`Length <BioSimSpace.Types.Length>`]
A list of allowed values.
"""
# Validate the unit.
if unit is not None:
length = _Types.Length("1 %s" % unit)
self._unit = length.unit()
self._print_unit = length._print_format[length.unit()]
else:
try:
self._unit = default.unit()
except:
raise ValueError(
"No unit or default value has been specified!")
# Call the base class constructor.
super().__init__(help=help,
default=default,
unit=self._unit,
minimum=minimum,
maximum=maximum,
allowed=allowed)