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import pickle
import param
import pytest
try:
import cloudpickle
except ImportError:
cloudpickle = None
try:
import numpy as np
except:
np = None
try:
import pandas as pd
except:
pd = None
def eq(o1, o2):
if not sorted(o1.param) == sorted(o2.param):
return False
for pname in o1.param:
if getattr(o1, pname) != getattr(o2, pname):
return False
return True
@pytest.fixture
def pickler(request):
if request.param is None:
pytest.skip('cloudpickle not available')
return request.param
class P1(param.Parameterized):
x = param.Parameter()
@pytest.mark.parametrize('pickler', [cloudpickle, pickle], indirect=True)
@pytest.mark.parametrize('protocol', [0, pickle.DEFAULT_PROTOCOL, pickle.HIGHEST_PROTOCOL])
def test_pickle_simple_class(pickler, protocol):
s = pickler.dumps(P1, protocol=protocol)
cls = pickler.loads(s)
assert cls is P1
@pytest.mark.parametrize('pickler', [cloudpickle, pickle], indirect=True)
@pytest.mark.parametrize('protocol', [0, pickle.DEFAULT_PROTOCOL, pickle.HIGHEST_PROTOCOL])
def test_pickle_simple_instance(pickler, protocol):
p = P1()
s = pickler.dumps(p, protocol=protocol)
inst = pickler.loads(s)
assert eq(p, inst)
@pytest.mark.parametrize('pickler', [cloudpickle, pickle], indirect=True)
@pytest.mark.parametrize('protocol', [0, pickle.DEFAULT_PROTOCOL, pickle.HIGHEST_PROTOCOL])
def test_pickle_simple_instance_modif_after(pickler, protocol):
p = P1()
s = pickler.dumps(p, protocol=protocol)
p.x = 'modified'
inst = pickler.loads(s)
assert not eq(p, inst)
assert inst.x is None
class P2(param.Parameterized):
a = param.Parameter()
b = param.String()
c = param.Dynamic()
d = param.Number()
e = param.Integer()
f = param.Action()
g = param.Event()
h = param.Callable()
i = param.Tuple()
k = param.NumericTuple()
l = param.Range()
m = param.XYCoordinates()
n = param.CalendarDateRange()
o = param.DateRange()
p = param.List()
q = param.HookList()
r = param.Path()
s = param.Filename()
t = param.Foldername()
u = param.Date()
v = param.CalendarDate()
w = param.Selector()
x = param.ObjectSelector()
y = param.FileSelector()
z = param.ListSelector()
aa = param.MultiFileSelector()
ab = param.ClassSelector(class_=type(None))
ac = None if pd is None else param.Series()
ad = param.Dict()
ae = None if pd is None else param.DataFrame()
af = None if np is None else param.Array()
@pytest.mark.parametrize('pickler', [cloudpickle, pickle], indirect=True)
@pytest.mark.parametrize('protocol', [0, pickle.DEFAULT_PROTOCOL, pickle.HIGHEST_PROTOCOL])
def test_pickle_all_parameters_class(pickler, protocol):
s = pickler.dumps(P2, protocol=protocol)
cls = pickler.loads(s)
assert cls is P2
@pytest.mark.parametrize('pickler', [cloudpickle, pickle], indirect=True)
@pytest.mark.parametrize('protocol', [0, pickle.DEFAULT_PROTOCOL, pickle.HIGHEST_PROTOCOL])
def test_pickle_all_parameters_instance(pickler, protocol):
p = P2()
s = pickler.dumps(p, protocol=protocol)
inst = pickler.loads(s)
assert eq(p, inst)
class P3(param.Parameterized):
a = param.Integer(0)
count = param.Integer(0)
@param.depends("a", watch=True)
def cb(self):
self.count += 1
@pytest.mark.parametrize('pickler', [cloudpickle, pickle], indirect=True)
@pytest.mark.parametrize('protocol', [0, pickle.DEFAULT_PROTOCOL, pickle.HIGHEST_PROTOCOL])
def test_pickle_depends_watch_class(pickler, protocol):
s = pickler.dumps(P3, protocol=protocol)
cls = pickler.loads(s)
assert cls is P3
@pytest.mark.parametrize('pickler', [cloudpickle, pickle], indirect=True)
@pytest.mark.parametrize('protocol', [0, pickle.DEFAULT_PROTOCOL, pickle.HIGHEST_PROTOCOL])
def test_pickle_depends_watch_instance(pickler, protocol):
# https://github.com/holoviz/param/issues/757
p = P3()
s = pickler.dumps(p, protocol=protocol)
inst = pickler.loads(s)
assert eq(p, inst)
inst.a += 1
assert inst.count == 1
class P4(param.Parameterized):
a = param.Parameter()
b = param.Parameter()
single_count = param.Integer()
attr_count = param.Integer()
single_nested_count = param.Integer()
double_nested_count = param.Integer()
nested_attr_count = param.Integer()
nested_count = param.Integer()
@param.depends('a', watch=True)
def single_parameter(self):
self.single_count += 1
@param.depends('a:constant', watch=True)
def constant(self):
self.attr_count += 1
@param.depends('b.a', watch=True)
def single_nested(self):
self.single_nested_count += 1
@param.depends('b.b.a', watch=True)
def double_nested(self):
self.double_nested_count += 1
@param.depends('b.a:constant', watch=True)
def nested_attribute(self):
self.nested_attr_count += 1
@param.depends('b.param', watch=True)
def nested(self):
self.nested_count += 1
@pytest.mark.parametrize('pickler', [cloudpickle, pickle], indirect=True)
@pytest.mark.parametrize('protocol', [0, pickle.DEFAULT_PROTOCOL, pickle.HIGHEST_PROTOCOL])
def test_pickle_complex_depends_class(pickler, protocol):
s = pickler.dumps(P4, protocol=protocol)
cls = pickler.loads(s)
assert cls is P4
@pytest.mark.parametrize('pickler', [cloudpickle, pickle], indirect=True)
@pytest.mark.parametrize('protocol', [0, pickle.DEFAULT_PROTOCOL, pickle.HIGHEST_PROTOCOL])
def test_pickle_complex_depends_instance(pickler, protocol):
p = P4()
s = pickler.dumps(p, protocol=protocol)
inst = pickler.loads(s)
assert eq(p, inst)
@pytest.mark.skipif(cloudpickle is None, reason='cloudpickle not available')
@pytest.mark.parametrize('protocol', [0, pickle.DEFAULT_PROTOCOL, pickle.HIGHEST_PROTOCOL])
def test_issue_757(protocol):
# https://github.com/holoviz/param/issues/759
class P(param.Parameterized):
a = param.Parameter()
p = P()
s = cloudpickle.dumps(p, protocol=protocol)
inst = cloudpickle.loads(s)
assert eq(p, inst)
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