def schema(self):
"""KeyTable schema.
**Example:** print the key table columns / signatures
>>> print(kt.schema)
:rtype: :class:`.TStruct`
"""
if self._schema is None:
self._schema = Type._from_java(self._jkt.signature())
assert (isinstance(self._schema, TStruct))
return self._schema
def eval_expr_typed(self, expr):
"""Evaluate an expression and return the result as well as its type.
:param str expr: Expression to evaluate.
:rtype: (annotation, :class:`.Type`)
"""
x = self._jhc.eval(expr)
t = Type._from_java(x._2())
v = t._convert_to_py(x._1())
return (v, t)
def schema(self):
"""KeyTable schema.
**Example:** print the key table columns / signatures
>>> print(kt1.schema)
Struct {
ID: Int,
HT: Int,
SEX: String,
X: Int,
Z: Int,
C1: Int,
C2: Int,
C3: Int
}
:rtype: :class:`.TStruct`
"""
if self._schema is None:
self._schema = Type._from_java(self._jkt.signature())
assert (isinstance(self._schema, TStruct))
return self._schema