def SDtoD(dist):
"""
Convert a ScalarDistribution to a Distribution.
Parameters
----------
dist : ScalarDistribution
The ScalarDistribution to convert to a Distribution.
"""
from dit.exceptions import ditException, InvalidDistribution
import dit.validate as v
if len(dist.pmf) == 0:
msg = "Cannot convert from empty ScalarDistribution."
raise InvalidDistribution(msg)
# Check if every element of the sample space is a sequence of the same
# length. If so, this is an easy conversion. If not, then we make
# every outcome a 1-tuple and then construct the joint distribution.
try:
# Each outcome is of the same class.
v.validate_outcome_class(dist.outcomes)
# Each outcome has the same length.
v.validate_outcome_length(dist.outcomes)
# Each outcome is a 'sequence'.
v.validate_sequence(dist.outcomes[0])
except ditException:
# Nested translation.
outcomes = [(o,) for o in dist.outcomes]
else:
outcomes = dist.outcomes
d = dit.Distribution(outcomes, dist.pmf, base=dist.get_base())
return d
def SDtoD(dist):
"""
Convert a ScalarDistribution to a Distribution.
Parameters
----------
dist : ScalarDistribution
The ScalarDistribution to convert to a Distribution.
"""
from dit.exceptions import ditException, InvalidDistribution
import dit.validate as v
if len(dist.pmf) == 0:
msg = "Cannot convert from empty ScalarDistribution."
raise InvalidDistribution(msg)
# Check if every element of the sample space is a sequence of the same
# length. If so, this is an easy conversion. If not, then we make
# every outcome a 1-tuple and then construct the joint distribution.
try:
# Each outcome is of the same class.
v.validate_outcome_class(dist.outcomes)
# Each outcome has the same length.
v.validate_outcome_length(dist.outcomes)
# Each outcome is a 'sequence'.
v.validate_sequence(dist.outcomes[0])
except ditException:
# Nested translation.
outcomes = [(o, ) for o in dist.outcomes]
else:
outcomes = dist.outcomes
d = dit.Distribution(outcomes, dist.pmf, base=dist.get_base())
return d
def test_validate_sequence():
x = '101'
assert_true(v.validate_sequence(x))
x = 3
assert_raises(dit.exceptions.ditException, v.validate_sequence, x)
def test_validate_sequence():
x = '101'
assert v.validate_sequence(x)
x = 3
with pytest.raises(dit.exceptions.ditException):
v.validate_sequence(x)
def test_validate_sequence():
x = '101'
assert_true(v.validate_sequence(x))
x = 3
assert_raises(dit.exceptions.ditException, v.validate_sequence, x)