def test_clone():
config = config0()
config2 = clone(config)
nodeset = set(dfs(config))
assert not any(n in nodeset for n in dfs(config2))
foo = recursive_set_rng_kwarg(config, scope.rng_from_seed(5))
r = rec_eval(foo)
print r
r2 = rec_eval(recursive_set_rng_kwarg(config2, scope.rng_from_seed(5)))
print r2
assert r == r2
def test_clone():
config = config0()
config2 = clone(config)
nodeset = set(dfs(config))
assert not any(n in nodeset for n in dfs(config2))
foo = recursive_set_rng_kwarg(
config,
scope.rng_from_seed(5))
r = rec_eval(foo)
print(r)
r2 = rec_eval(
recursive_set_rng_kwarg(
config2,
scope.rng_from_seed(5)))
print(r2)
assert r == r2
def memo_from_config(self, config):
memo = {}
for node in pyll.dfs(self.expr):
if node.name == 'hyperopt_param':
label = node.arg['label'].obj
# -- hack because it's not really garbagecollected
# this does have the desired effect of crashing the
# function if rec_eval actually needs a value that
# the the optimization algorithm thought to be unnecessary
memo[node] = config.get(label, pyll.base.GarbageCollected)
return memo
def work(self):
"""Test that all prior samplers are gone"""
tpe_algo = TreeParzenEstimator(self.bandit)
foo = pyll.as_apply(
[tpe_algo.post_below['idxs'], tpe_algo.post_below['vals']])
prior_names = [
'uniform',
'quniform',
'loguniform',
'qloguniform',
'normal',
'qnormal',
'lognormal',
'qlognormal',
'randint',
]
for node in pyll.dfs(foo):
assert node.name not in prior_names
def use_obj_for_literal_in_memo(expr, obj, lit, memo):
"""
Set `memo[node] = obj` for all nodes in expr such that `node.obj == lit`
This is a useful routine for fmin-compatible functions that are searching
domains that include some leaf nodes that are complicated
runtime-generated objects. One option is to make such leaf nodes pyll
functions, but it can be easier to construct those objects the normal
Python way in the fmin function, and just stick them into the evaluation
memo. The experiment ctrl object itself is inserted using this technique.
"""
for node in pyll.dfs(expr):
try:
if node.obj == lit:
memo[node] = obj
except AttributeError:
# -- non-literal nodes don't have node.obj
pass
return memo
def work(self):
"""Test that all prior samplers are gone"""
tpe_algo = TreeParzenEstimator(self.bandit)
foo = pyll.as_apply([
tpe_algo.post_below['idxs'],
tpe_algo.post_below['vals']])
prior_names = [
'uniform',
'quniform',
'loguniform',
'qloguniform',
'normal',
'qnormal',
'lognormal',
'qlognormal',
'randint',
]
for node in pyll.dfs(foo):
assert node.name not in prior_names
def get_args(params):
memo = {node: params[node.arg['label'].obj]
for node in pyll.dfs(expr) if node.name == 'hyperopt_param'}
return pyll.rec_eval(expr, memo=memo)
len(df_cuisine['cuisine_parent'].unique()),
#'device_type':'gpu',
#'max_bin': 63,
'num_threads':
0
}
# get first level of parameters
param_keys = list(params.keys())
# search through hyperopt distributions for choices
dict_nodes = []
for k, v in params.items():
try:
dict_nodes.extend(
[node for node in pyll.dfs(v) if node.name == 'dict'])
except:
pass
# in nodes that are dictionaries (i.e. the list of dictionary choices)
for d in dict_nodes:
for param in d.named_args:
param_keys.append(param[0])
# use set to remove duplicates
param_keys = sorted(list(set(param_keys)))
N_FOLDS = 3
def objective(params, n_folds=N_FOLDS):
"""Objective function for Gradient Boosting Machine Hyperparameter Optimization"""
def __init__(self, fn, expr,
workdir=None,
pass_expr_memo_ctrl=None,
name=None,
loss_target=None,
):
"""
Paramaters
----------
fn : callable
This stores the `fn` argument to `fmin`. (See `hyperopt.fmin.fmin`)
expr : hyperopt.pyll.Apply
This is the `space` argument to `fmin`. (See `hyperopt.fmin.fmin`)
workdir : string (or None)
If non-None, the current working directory will be `workdir`while
`expr` and `fn` are evaluated. (XXX Currently only respected by
jobs run via MongoWorker)
pass_expr_memo_ctrl : bool
If True, `fn` will be called like this:
`fn(self.expr, memo, ctrl)`,
where `memo` is a dictionary mapping `Apply` nodes to their
computed values, and `ctrl` is a `Ctrl` instance for communicating
with a Trials database. This lower-level calling convention is
useful if you want to call e.g. `hyperopt.pyll.rec_eval` yourself
in some customized way.
name : string (or None)
Label, used for pretty-printing.
loss_target : float (or None)
The actual or estimated minimum of `fn`.
Some optimization algorithms may behave differently if their first
objective is to find an input that achieves a certain value,
rather than the more open-ended objective of pure minimization.
XXX: Move this from Domain to be an fmin arg.
"""
self.fn = fn
if pass_expr_memo_ctrl is None:
self.pass_expr_memo_ctrl = getattr(fn,
'fmin_pass_expr_memo_ctrl',
False)
else:
self.pass_expr_memo_ctrl = pass_expr_memo_ctrl
self.expr = pyll.as_apply(expr)
self.params = {}
for node in pyll.dfs(self.expr):
if node.name == 'hyperopt_param':
label = node.arg['label'].obj
if label in self.params:
raise DuplicateLabel(label)
self.params[label] = node.arg['obj']
self.loss_target = loss_target
self.name = name
self.workdir = workdir
self.s_new_ids = pyll.Literal('new_ids') # -- list at eval-time
before = pyll.dfs(self.expr)
# -- raises exception if expr contains cycles
pyll.toposort(self.expr)
vh = self.vh = VectorizeHelper(self.expr, self.s_new_ids)
# -- raises exception if v_expr contains cycles
pyll.toposort(vh.v_expr)
idxs_by_label = vh.idxs_by_label()
vals_by_label = vh.vals_by_label()
after = pyll.dfs(self.expr)
# -- try to detect if VectorizeHelper screwed up anything inplace
assert before == after
assert set(idxs_by_label.keys()) == set(vals_by_label.keys())
assert set(idxs_by_label.keys()) == set(self.params.keys())
self.s_rng = pyll.Literal('rng-placeholder')
# -- N.B. operates inplace:
self.s_idxs_vals = recursive_set_rng_kwarg(
pyll.scope.pos_args(idxs_by_label, vals_by_label),
self.s_rng)
# -- raises an exception if no topological ordering exists
pyll.toposort(self.s_idxs_vals)
# -- Protocol for serialization.
# self.cmd indicates to e.g. MongoWorker how this domain
# should be [un]serialized.
# XXX This mechanism deserves review as support for ipython
# workers improves.
self.cmd = ('domain_attachment', 'FMinIter_Domain')