def instance_from_dict(d):
"""Returns a new DLite instance created from dict `d`, which should
be of the same form as returned by the Instance.asdict() method.
"""
meta = dlite.get_instance(d['meta'])
if meta.is_metameta:
try:
return dlite.get_instance(d['uri'])
except RuntimeError:
pass
dimensions = [
dlite.Dimension(d['name'], d.get('description'))
for d in d['dimensions']
]
props = []
dimmap = {dim['name']: i for i, dim in enumerate(d['dimensions'])}
for p in d['properties']:
if 'dims' in p:
dims = [dimmap[d] for d in p['dims']]
else:
dims = None
props.append(
dlite.Property(p['name'], p['type'], dims, p.get('unit'),
p.get('description')))
inst = dlite.Instance(d['uri'], dimensions, props,
d.get('description'))
else:
dims = list(d['dimensions'].values())
inst = dlite.Instance(meta.uri, dims, d.get('uuid', None))
for p in meta['properties']:
inst[p.name] = d['properties'][p.name]
return inst
def load(self, uuid):
"""Loads `uuid` from current storage and return it as a new instance."""
uuid = dlite.get_uuid(uuid)
q = sql.SQL('SELECT meta FROM uuidtable WHERE uuid = %s')
self.cur.execute(q, [uuid])
metaid, = self.cur.fetchone()
q = sql.SQL('SELECT * FROM {} WHERE uuid = %s').format(
sql.Identifier(metaid))
self.cur.execute(q, [uuid])
tokens = self.cur.fetchone()
uuid_, uri, metaid_, dims = tokens[:4]
values = tokens[4:]
assert uuid_ == uuid
assert metaid_ == metaid
inst = dlite.Instance(metaid, dims, uri)
for i, p in enumerate(inst.meta['properties']):
inst.set_property(p.name, values[i])
return inst
dims = None
props.append(
dlite.Property(p['name'], p['type'], dims, p.get('unit'),
p.get('description')))
inst = dlite.Instance(d['uri'], dimensions, props,
d.get('description'))
else:
dims = list(d['dimensions'].values())
inst = dlite.Instance(meta.uri, dims, d.get('uuid', None))
for p in meta['properties']:
inst[p.name] = d['properties'][p.name]
return inst
if __name__ == '__main__':
url = 'json://' + os.path.join(thisdir, 'tests',
'Person.json') #+ "?mode=r"
Person = dlite.Instance(url)
person = Person([2])
person.name = 'Ada'
person.age = 12.5
person.skills = ['skiing', 'jumping']
d1 = person.asdict()
inst1 = instance_from_dict(d1)
d2 = Person.asdict()
inst2 = instance_from_dict(d2)
def map(self, instances):
inst3 = instances[0]
print(inst3)
inst1 = dlite.Instance(self.output_uri, [])
inst1.a = int(inst3.c - 12.0 + 0.5)
return inst1
def map(self, instances):
inst1 = instances[0]
inst3 = dlite.Instance(self.output_uri, [])
inst3.c = inst1.a + 12.0
return inst3