def __init__(self, name="MOCKMOCK"):

self._name = name

def eval(self, state, env):

return env["mock"]

def name(self):

if arr.ndim > dim:

msg = ("factor '%s' evaluates to an %s-dimensional array; I only "

"handle arrays with dimension <= %s"

% (factor.name(), arr.ndim, dim))

import pytest

f = _MockFactor()

_max_allowed_dim(1, np.array(1), f)

_max_allowed_dim(1, np.array([1]), f)

pytest.raises(PatsyError, _max_allowed_dim, 1, np.array([[1]]), f)

pytest.raises(PatsyError, _max_allowed_dim, 1, np.array([[[1]]]), f)

_max_allowed_dim(2, np.array(1), f)

_max_allowed_dim(2, np.array([1]), f)

_max_allowed_dim(2, np.array([[1]]), f)

factor = factor_info.factor

result = factor.eval(factor_info.state, data)

# Returns either a 2d ndarray, or a DataFrame, plus is_NA mask

if factor_info.type == "numerical":

result = atleast_2d_column_default(result, preserve_pandas=True)

_max_allowed_dim(2, result, factor)

if result.shape[1] != factor_info.num_columns:

raise PatsyError("when evaluating factor %s, I got %s columns "

"instead of the %s I was expecting"

% (factor.name(),

factor_info.num_columns,

result.shape[1]),

factor)

if not safe_issubdtype(np.asarray(result).dtype, np.number):

raise PatsyError("when evaluating numeric factor %s, "

"I got non-numeric data of type '%s'"

% (factor.name(), result.dtype),

factor)

return result, NA_action.is_numerical_NA(result)

# returns either a 1d ndarray or a pandas.Series, plus is_NA mask

else:

assert factor_info.type == "categorical"

result = categorical_to_int(result, factor_info.categories, NA_action,

origin=factor_info.factor)

assert result.ndim == 1

import pytest

naa = NAAction()

f = _MockFactor()

fi1 = FactorInfo(f, "numerical", {}, num_columns=1, categories=None)

assert fi1.factor is f

eval123, is_NA = _eval_factor(fi1, {"mock": [1, 2, 3]}, naa)

assert eval123.shape == (3, 1)

assert np.all(eval123 == [[1], [2], [3]])

assert is_NA.shape == (3,)

assert np.all(~is_NA)

pytest.raises(PatsyError, _eval_factor, fi1, {"mock": [[[1]]]}, naa)

pytest.raises(PatsyError, _eval_factor, fi1, {"mock": [[1, 2]]}, naa)

pytest.raises(PatsyError, _eval_factor, fi1, {"mock": ["a", "b"]}, naa)

pytest.raises(PatsyError, _eval_factor, fi1, {"mock": [True, False]}, naa)

fi2 = FactorInfo(_MockFactor(), "numerical",

{}, num_columns=2, categories=None)

eval123321, is_NA = _eval_factor(fi2,

{"mock": [[1, 3], [2, 2], [3, 1]]},

naa)

assert eval123321.shape == (3, 2)

assert np.all(eval123321 == [[1, 3], [2, 2], [3, 1]])

assert is_NA.shape == (3,)

assert np.all(~is_NA)

pytest.raises(PatsyError, _eval_factor, fi2, {"mock": [1, 2, 3]}, naa)

pytest.raises(PatsyError, _eval_factor, fi2, {"mock": [[1, 2, 3]]}, naa)

ev_nan, is_NA = _eval_factor(fi1, {"mock": [1, 2, np.nan]},

NAAction(NA_types=["NaN"]))

assert np.array_equal(is_NA, [False, False, True])

ev_nan, is_NA = _eval_factor(fi1, {"mock": [1, 2, np.nan]},

NAAction(NA_types=[]))

assert np.array_equal(is_NA, [False, False, False])

if have_pandas:

eval_ser, _ = _eval_factor(fi1,

{"mock":

pandas.Series([1, 2, 3],

index=[10, 20, 30])},

naa)

assert isinstance(eval_ser, pandas.DataFrame)

assert np.array_equal(eval_ser, [[1], [2], [3]])

assert np.array_equal(eval_ser.index, [10, 20, 30])

eval_df1, _ = _eval_factor(fi1,

{"mock":

pandas.DataFrame([[2], [1], [3]],

index=[20, 10, 30])},

naa)

assert isinstance(eval_df1, pandas.DataFrame)

assert np.array_equal(eval_df1, [[2], [1], [3]])

assert np.array_equal(eval_df1.index, [20, 10, 30])

eval_df2, _ = _eval_factor(fi2,

{"mock":

pandas.DataFrame([[2, 3], [1, 4], [3, -1]],

index=[20, 30, 10])},

naa)

assert isinstance(eval_df2, pandas.DataFrame)

assert np.array_equal(eval_df2, [[2, 3], [1, 4], [3, -1]])

assert np.array_equal(eval_df2.index, [20, 30, 10])

pytest.raises(PatsyError,

_eval_factor, fi2,

{"mock": pandas.Series([1, 2, 3], index=[10, 20, 30])},

naa)

pytest.raises(PatsyError,

_eval_factor, fi1,

{"mock":

pandas.DataFrame([[2, 3], [1, 4], [3, -1]],

index=[20, 30, 10])},

import pytest

from patsy.categorical import C

naa = NAAction()

f = _MockFactor()

fi1 = FactorInfo(f, "categorical",

{}, num_columns=None, categories=("a", "b"))

assert fi1.factor is f

cat1, _ = _eval_factor(fi1, {"mock": ["b", "a", "b"]}, naa)

assert cat1.shape == (3,)

assert np.all(cat1 == [1, 0, 1])

pytest.raises(PatsyError, _eval_factor, fi1, {"mock": ["c"]}, naa)

pytest.raises(PatsyError, _eval_factor, fi1, {"mock": C(["a", "c"])}, naa)

pytest.raises(PatsyError, _eval_factor, fi1,

{"mock": C(["a", "b"], levels=["b", "a"])}, naa)

pytest.raises(PatsyError, _eval_factor, fi1, {"mock": [1, 0, 1]}, naa)

bad_cat = np.asarray(["b", "a", "a", "b"])

bad_cat.resize((2, 2))

pytest.raises(PatsyError, _eval_factor, fi1, {"mock": bad_cat}, naa)

cat1_NA, is_NA = _eval_factor(fi1, {"mock": ["a", None, "b"]},

NAAction(NA_types=["None"]))

assert np.array_equal(is_NA, [False, True, False])

assert np.array_equal(cat1_NA, [0, -1, 1])

pytest.raises(PatsyError, _eval_factor, fi1,

{"mock": ["a", None, "b"]}, NAAction(NA_types=[]))

fi2 = FactorInfo(_MockFactor(), "categorical", {},

num_columns=None, categories=[False, True])

cat2, _ = _eval_factor(fi2, {"mock": [True, False, False, True]}, naa)

assert cat2.shape == (4,)

assert np.all(cat2 == [1, 0, 0, 1])

if have_pandas:

s = pandas.Series(["b", "a"], index=[10, 20])

cat_s, _ = _eval_factor(fi1, {"mock": s}, naa)

assert isinstance(cat_s, pandas.Series)

assert np.array_equal(cat_s, [1, 0])

assert np.array_equal(cat_s.index, [10, 20])

sbool = pandas.Series([True, False], index=[11, 21])

cat_sbool, _ = _eval_factor(fi2, {"mock": sbool}, naa)

assert isinstance(cat_sbool, pandas.Series)

assert np.array_equal(cat_sbool, [1, 0])

# For consistency with R, the left-most item iterates fastest:

iterators = [range(n) for n in reversed(columns_per_factor)]

for reversed_combo in itertools.product(*iterators):

assert list(_column_combinations([2, 3])) == [(0, 0),

(1, 0),

(0, 1),

(1, 1),

(0, 2),

(1, 2)]

assert list(_column_combinations([3])) == [(0,), (1,), (2,)]

columns_per_factor = []

for factor in subterm.factors:

if factor in subterm.contrast_matrices:

columns = subterm.contrast_matrices[factor].matrix.shape[1]

else:

columns = factor_infos[factor].num_columns

columns_per_factor.append(columns)

total = 0

for i, column_idxs in enumerate(

_subterm_column_combinations(factor_infos, subterm)):

name_pieces = []

for factor, column_idx in zip(subterm.factors, column_idxs):

fi = factor_infos[factor]

if fi.type == "numerical":

if fi.num_columns > 1:

name_pieces.append("%s[%s]"

% (factor.name(), column_idx))

else:

assert column_idx == 0

name_pieces.append(factor.name())

else:

assert fi.type == "categorical"

contrast = subterm.contrast_matrices[factor]

suffix = contrast.column_suffixes[column_idx]

name_pieces.append("%s%s" % (factor.name(), suffix))

if not name_pieces:

yield "Intercept"

else:

yield ":".join(name_pieces)

total += 1

assert subterm.num_columns == out.shape[1]

out[...] = 1

for i, column_idxs in enumerate(

_subterm_column_combinations(factor_infos, subterm)):

for factor, column_idx in zip(subterm.factors, column_idxs):

if factor_infos[factor].type == "categorical":

contrast = subterm.contrast_matrices[factor]

if np.any(factor_values[factor] < 0):

raise PatsyError("can't build a design matrix "

"containing missing values", factor)

out[:, i] *= contrast.matrix[factor_values[factor],

column_idx]

else:

assert factor_infos[factor].type == "numerical"

assert (factor_values[factor].shape[1]

== factor_infos[factor].num_columns)

import pytest

from patsy.contrasts import ContrastMatrix

from patsy.categorical import C

f1 = _MockFactor("f1")

f2 = _MockFactor("f2")

f3 = _MockFactor("f3")

contrast = ContrastMatrix(np.array([[0, 0.5],

[3, 0]]),

["[c1]", "[c2]"])

factor_infos1 = {f1: FactorInfo(f1, "numerical", {},

num_columns=1, categories=None),

f2: FactorInfo(f2, "categorical", {},

num_columns=None, categories=["a", "b"]),

f3: FactorInfo(f3, "numerical", {},

num_columns=1, categories=None),

}

contrast_matrices = {f2: contrast}

subterm1 = SubtermInfo([f1, f2, f3], contrast_matrices, 2)

assert (list(_subterm_column_names_iter(factor_infos1, subterm1))

== ["f1:f2[c1]:f3", "f1:f2[c2]:f3"])

mat = np.empty((3, 2))

_build_subterm(subterm1, factor_infos1,

{f1: atleast_2d_column_default([1, 2, 3]),

f2: np.asarray([0, 0, 1]),

f3: atleast_2d_column_default([7.5, 2, -12])},

mat)

assert np.allclose(mat, [[0, 0.5 * 1 * 7.5],

[0, 0.5 * 2 * 2],

[3 * 3 * -12, 0]])

# Check that missing categorical values blow up

pytest.raises(PatsyError, _build_subterm, subterm1, factor_infos1,

{f1: atleast_2d_column_default([1, 2, 3]),

f2: np.asarray([0, -1, 1]),

f3: atleast_2d_column_default([7.5, 2, -12])},

mat)

factor_infos2 = dict(factor_infos1)

factor_infos2[f1] = FactorInfo(f1, "numerical", {},

num_columns=2, categories=None)

subterm2 = SubtermInfo([f1, f2, f3], contrast_matrices, 4)

assert (list(_subterm_column_names_iter(factor_infos2, subterm2))

== ["f1[0]:f2[c1]:f3",

"f1[1]:f2[c1]:f3",

"f1[0]:f2[c2]:f3",

"f1[1]:f2[c2]:f3"])

mat2 = np.empty((3, 4))

_build_subterm(subterm2, factor_infos2,

{f1: atleast_2d_column_default([[1, 2], [3, 4], [5, 6]]),

f2: np.asarray([0, 0, 1]),

f3: atleast_2d_column_default([7.5, 2, -12])},

mat2)

assert np.allclose(mat2, [[0, 0, 0.5 * 1 * 7.5, 0.5 * 2 * 7.5],

[0, 0, 0.5 * 3 * 2, 0.5 * 4 * 2],

[3 * 5 * -12, 3 * 6 * -12, 0, 0]])

subterm_int = SubtermInfo([], {}, 1)

assert list(_subterm_column_names_iter({}, subterm_int)) == ["Intercept"]

mat3 = np.empty((3, 1))

_build_subterm(subterm_int, {},

{f1: [1, 2, 3], f2: [1, 2, 3], f3: [1, 2, 3]},

mat3)

# First, start off the memorization process by setting up each factor's

# state and finding out how many passes it will need:

factor_states = {}

passes_needed = {}

for factor in factors:

state = {}

which_pass = factor.memorize_passes_needed(state, eval_env)

factor_states[factor] = state

passes_needed[factor] = which_pass

# Now, cycle through the data until all the factors have finished

# memorizing everything:

memorize_needed = set()

for factor, passes in six.iteritems(passes_needed):

if passes > 0:

memorize_needed.add(factor)

which_pass = 0

while memorize_needed:

for data in data_iter_maker():

for factor in memorize_needed:

state = factor_states[factor]

factor.memorize_chunk(state, which_pass, data)

for factor in list(memorize_needed):

factor.memorize_finish(factor_states[factor], which_pass)

if which_pass == passes_needed[factor] - 1:

memorize_needed.remove(factor)

which_pass += 1

class MockFactor(object):

def __init__(self, requested_passes, token):

self._requested_passes = requested_passes

self._token = token

self._chunk_in_pass = 0

self._seen_passes = 0

def memorize_passes_needed(self, state, eval_env):

state["calls"] = []

state["token"] = self._token

return self._requested_passes

def memorize_chunk(self, state, which_pass, data):

state["calls"].append(("memorize_chunk", which_pass))

assert data["chunk"] == self._chunk_in_pass

self._chunk_in_pass += 1

def memorize_finish(self, state, which_pass):

state["calls"].append(("memorize_finish", which_pass))

self._chunk_in_pass = 0

class Data(object):

CHUNKS = 3

def __init__(self):

self.calls = 0

self.data = [{"chunk": i} for i in range(self.CHUNKS)]

def __call__(self):

self.calls += 1

return iter(self.data)

data = Data()

f0 = MockFactor(0, "f0")

f1 = MockFactor(1, "f1")

f2a = MockFactor(2, "f2a")

f2b = MockFactor(2, "f2b")

factor_states = _factors_memorize(set([f0, f1, f2a, f2b]), data, {})

assert data.calls == 2

mem_chunks0 = [("memorize_chunk", 0)] * data.CHUNKS

mem_chunks1 = [("memorize_chunk", 1)] * data.CHUNKS

expected = {

f0: {

"calls": [],

"token": "f0",

},

f1: {

"calls": mem_chunks0 + [("memorize_finish", 0)],

"token": "f1",

},

f2a: {

"calls": mem_chunks0 + [("memorize_finish", 0)]

+ mem_chunks1 + [("memorize_finish", 1)],

"token": "f2a",

},

f2b: {

"calls": mem_chunks0 + [("memorize_finish", 0)]

+ mem_chunks1 + [("memorize_finish", 1)],

"token": "f2b",

},

}

num_column_counts = {}

cat_sniffers = {}

examine_needed = set(factors)

for data in data_iter_maker():

for factor in list(examine_needed):

value = factor.eval(factor_states[factor], data)

if factor in cat_sniffers or guess_categorical(value):

if factor not in cat_sniffers:

cat_sniffers[factor] = CategoricalSniffer(NA_action,

factor.origin)

done = cat_sniffers[factor].sniff(value)

if done:

examine_needed.remove(factor)

else:

# Numeric

value = atleast_2d_column_default(value)

_max_allowed_dim(2, value, factor)

column_count = value.shape[1]

num_column_counts[factor] = column_count

examine_needed.remove(factor)

if not examine_needed:

break

# Pull out the levels

cat_levels_contrasts = {}

for factor, sniffer in six.iteritems(cat_sniffers):

cat_levels_contrasts[factor] = sniffer.levels_contrast()

from patsy.categorical import C

class MockFactor(object):

def __init__(self):

# You should check this using 'is', not '=='

from patsy.origin import Origin

self.origin = Origin("MOCK", 1, 2)

def eval(self, state, data):

return state[data]

def name(self):

return "MOCK MOCK"

# This hacky class can only be iterated over once, but it keeps track of

# how far it got.

class DataIterMaker(object):

def __init__(self):

self.i = -1

def __call__(self):

return self

def __iter__(self):

return self

def next(self):

self.i += 1

if self.i > 1:

raise StopIteration

return self.i

__next__ = next

num_1dim = MockFactor()

num_1col = MockFactor()

num_4col = MockFactor()

categ_1col = MockFactor()

bool_1col = MockFactor()

string_1col = MockFactor()

object_1col = MockFactor()

object_levels = (object(), object(), object())

factor_states = {

num_1dim: ([1, 2, 3], [4, 5, 6]),

num_1col: ([[1], [2], [3]], [[4], [5], [6]]),

num_4col: (np.zeros((3, 4)), np.ones((3, 4))),

categ_1col: (C(["a", "b", "c"], levels=("a", "b", "c"),

contrast="MOCK CONTRAST"),

C(["c", "b", "a"], levels=("a", "b", "c"),

contrast="MOCK CONTRAST")),

bool_1col: ([True, True, False], [False, True, True]),

# It has to read through all the data to see all the possible levels:

string_1col: (["a", "a", "a"], ["c", "b", "a"]),

object_1col: ([object_levels[0]] * 3, object_levels),

}

it = DataIterMaker()

(num_column_counts, cat_levels_contrasts,

) = _examine_factor_types(factor_states.keys(), factor_states, it,

NAAction())

assert it.i == 2

iterations = 0

assert num_column_counts == {num_1dim: 1, num_1col: 1, num_4col: 4}

assert cat_levels_contrasts == {

categ_1col: (("a", "b", "c"), "MOCK CONTRAST"),

bool_1col: ((False, True), None),

string_1col: (("a", "b", "c"), None),

object_1col: (tuple(sorted(object_levels, key=id)), None),

}

# Check that it doesn't read through all the data if that's not necessary:

it = DataIterMaker()

no_read_necessary = [num_1dim, num_1col, num_4col, categ_1col, bool_1col]

(num_column_counts, cat_levels_contrasts,

) = _examine_factor_types(no_read_necessary, factor_states, it,

NAAction())

assert it.i == 0

assert num_column_counts == {num_1dim: 1, num_1col: 1, num_4col: 4}

assert cat_levels_contrasts == {

categ_1col: (("a", "b", "c"), "MOCK CONTRAST"),

bool_1col: ((False, True), None),

}

# Illegal inputs:

bool_3col = MockFactor()

num_3dim = MockFactor()

# no such thing as a multi-dimensional Categorical

# categ_3dim = MockFactor()

string_3col = MockFactor()

object_3col = MockFactor()

illegal_factor_states = {

num_3dim: (np.zeros((3, 3, 3)), np.ones((3, 3, 3))),

string_3col: ([["a", "b", "c"]], [["b", "c", "a"]]),

object_3col: ([[[object()]]], [[[object()]]]),

}

import pytest

for illegal_factor in illegal_factor_states:

it = DataIterMaker()

try:

_examine_factor_types([illegal_factor], illegal_factor_states, it,

NAAction())

except PatsyError as e:

assert e.origin is illegal_factor.origin

else:

num_column_counts,

cat_levels_contrasts):

# Sort each term into a bucket based on the set of numeric factors it

# contains:

term_buckets = OrderedDict()

bucket_ordering = []

for term in terms:

num_factors = []

for factor in term.factors:

if factor in num_column_counts:

num_factors.append(factor)

bucket = frozenset(num_factors)

if bucket not in term_buckets:

bucket_ordering.append(bucket)

term_buckets.setdefault(bucket, []).append(term)

# Special rule: if there is a no-numerics bucket, then it always comes

# first:

if frozenset() in term_buckets:

bucket_ordering.remove(frozenset())

bucket_ordering.insert(0, frozenset())

term_to_subterm_infos = OrderedDict()

new_term_order = []

# Then within each bucket, work out which sort of contrasts we want to use

# for each term to avoid redundancy

for bucket in bucket_ordering:

bucket_terms = term_buckets[bucket]

# Sort by degree of interaction

bucket_terms.sort(key=lambda t: len(t.factors))

new_term_order += bucket_terms

used_subterms = set()

for term in bucket_terms:

subterm_infos = []

factor_codings = pick_contrasts_for_term(term,

num_column_counts,

used_subterms)

# Construct one SubtermInfo for each subterm

for factor_coding in factor_codings:

subterm_factors = []

contrast_matrices = {}

subterm_columns = 1

# In order to preserve factor ordering information, the

# coding_for_term just returns dicts, and we refer to

# the original factors to figure out which are included in

# each subterm, and in what order

for factor in term.factors:

# Numeric factors are included in every subterm

if factor in num_column_counts:

subterm_factors.append(factor)

subterm_columns *= num_column_counts[factor]

elif factor in factor_coding:

subterm_factors.append(factor)

levels, contrast = cat_levels_contrasts[factor]

# This is where the default coding is set to

# Treatment:

coded = code_contrast_matrix(factor_coding[factor],

levels, contrast,

default=Treatment)

contrast_matrices[factor] = coded

subterm_columns *= coded.matrix.shape[1]

subterm_infos.append(SubtermInfo(subterm_factors,

contrast_matrices,

subterm_columns))

term_to_subterm_infos[term] = subterm_infos

assert new_term_order == list(term_to_subterm_infos)

NA_action="drop"):

"""Construct several :class:`DesignInfo` objects from termlists.

# People upgrading from versions prior to 0.4.0 could potentially have

# passed NA_action as the 3rd positional argument. Fortunately

# EvalEnvironment.capture only accepts int and EvalEnvironment objects,

# and we improved its error messages to make this clear.

eval_env = EvalEnvironment.capture(eval_env, reference=1)

if isinstance(NA_action, str):

NA_action = NAAction(NA_action)

all_factors = set()

for termlist in termlists:

for term in termlist:

all_factors.update(term.factors)

factor_states = _factors_memorize(all_factors, data_iter_maker, eval_env)

# Now all the factors have working eval methods, so we can evaluate them

# on some data to find out what type of data they return.

(num_column_counts,

cat_levels_contrasts) = _examine_factor_types(all_factors,

factor_states,

data_iter_maker,

NA_action)

# Now we need the factor infos, which encapsulate the knowledge of

# how to turn any given factor into a chunk of data:

factor_infos = {}

for factor in all_factors:

if factor in num_column_counts:

fi = FactorInfo(factor,

"numerical",

factor_states[factor],

num_columns=num_column_counts[factor],

categories=None)

else:

assert factor in cat_levels_contrasts

categories = cat_levels_contrasts[factor][0]

fi = FactorInfo(factor,

"categorical",

factor_states[factor],

num_columns=None,

categories=categories)

factor_infos[factor] = fi

# And now we can construct the DesignInfo for each termlist:

design_infos = []

for termlist in termlists:

term_to_subterm_infos = _make_subterm_infos(termlist,

num_column_counts,

cat_levels_contrasts)

assert isinstance(term_to_subterm_infos, OrderedDict)

assert frozenset(term_to_subterm_infos) == frozenset(termlist)

this_design_factor_infos = {}

for term in termlist:

for factor in term.factors:

this_design_factor_infos[factor] = factor_infos[factor]

column_names = []

for subterms in six.itervalues(term_to_subterm_infos):

for subterm in subterms:

for column_name in _subterm_column_names_iter(

factor_infos, subterm):

column_names.append(column_name)

design_infos.append(DesignInfo(column_names,

factor_infos=this_design_factor_infos,

term_codings=term_to_subterm_infos))

factor_to_values = {}

need_reshape = False

num_rows = None

for factor_info, value in six.iteritems(factor_info_to_values):

# It's possible that the same factor appears in multiple different

# FactorInfo objects (e.g. if someone is simultaneously building two

# DesignInfo objects that started out as part of different

# formulas). Skip any factor_info that is not our expected

# factor_info.

if design_info.factor_infos.get(factor_info.factor) is not factor_info:

continue

factor_to_values[factor_info.factor] = value

if num_rows is not None:

assert num_rows == value.shape[0]

else:

num_rows = value.shape[0]

if num_rows is None:

# We have no dependence on the data -- e.g. an empty termlist, or

# only an intercept term.

num_rows = 1

need_reshape = True

shape = (num_rows, len(design_info.column_names))

m = DesignMatrix(np.empty(shape, dtype=dtype), design_info)

start_column = 0

for term, subterms in six.iteritems(design_info.term_codings):

for subterm in subterms:

end_column = start_column + subterm.num_columns

m_slice = m[:, start_column:end_column]

_build_subterm(subterm, design_info.factor_infos,

factor_to_values, m_slice)

start_column = end_column

assert start_column == m.shape[1]

def __init__(self, name, eq_fn):

self._name = name

self._eq_fn = eq_fn

self.value = None

self._value_desc = None

self._value_origin = None

def check(self, seen_value, desc, origin):

if self.value is None:

self.value = seen_value

self._value_desc = desc

self._value_origin = origin

else:

if not self._eq_fn(self.value, seen_value):

msg = ("%s mismatch between %s and %s"

% (self._name, self._value_desc, desc))

if isinstance(self.value, int):

msg += " (%r versus %r)" % (self.value, seen_value)

# XX FIXME: this is a case where having discontiguous Origins

# would be useful...

NA_action="drop",

return_type="matrix",

dtype=np.dtype(float)):

"""Construct several design matrices from :class:`DesignMatrixBuilder`

if isinstance(NA_action, str):

NA_action = NAAction(NA_action)

if return_type == "dataframe" and not have_pandas:

raise PatsyError("pandas.DataFrame was requested, but pandas "

"is not installed")

if return_type not in ("matrix", "dataframe"):

raise PatsyError("unrecognized output type %r, should be "

"'matrix' or 'dataframe'" % (return_type,))

# Evaluate factors

factor_info_to_values = {}

factor_info_to_isNAs = {}

rows_checker = _CheckMatch("Number of rows", lambda a, b: a == b)

index_checker = _CheckMatch("Index", lambda a, b: a.equals(b))

if have_pandas and isinstance(data, pandas.DataFrame):

index_checker.check(data.index, "data.index", None)

rows_checker.check(data.shape[0], "data argument", None)

for design_info in design_infos:

# We look at evaluators rather than factors here, because it might

# happen that we have the same factor twice, but with different

# memorized state.

for factor_info in six.itervalues(design_info.factor_infos):

if factor_info not in factor_info_to_values:

value, is_NA = _eval_factor(factor_info, data, NA_action)

factor_info_to_isNAs[factor_info] = is_NA

# value may now be a Series, DataFrame, or ndarray

name = factor_info.factor.name()

origin = factor_info.factor.origin

rows_checker.check(value.shape[0], name, origin)

if (have_pandas

and isinstance(value, (pandas.Series, pandas.DataFrame))):

index_checker.check(value.index, name, origin)

# Strategy: we work with raw ndarrays for doing the actual

# combining; DesignMatrixBuilder objects never sees pandas

# objects. Then at the end, if a DataFrame was requested, we

# convert. So every entry in this dict is either a 2-d array

# of floats, or a 1-d array of integers (representing

# categories).

value = np.asarray(value)

factor_info_to_values[factor_info] = value

# Handle NAs

values = list(factor_info_to_values.values())

is_NAs = list(factor_info_to_isNAs.values())

origins = [factor_info.factor.origin

for factor_info in factor_info_to_values]

pandas_index = index_checker.value

num_rows = rows_checker.value

# num_rows is None iff evaluator_to_values (and associated sets like

# 'values') are empty, i.e., we have no actual evaluators involved

# (formulas like "~ 1").

if return_type == "dataframe" and num_rows is not None:

if pandas_index is None:

pandas_index = np.arange(num_rows)

values.append(pandas_index)

is_NAs.append(np.zeros(len(pandas_index), dtype=bool))

origins.append(None)

new_values = NA_action.handle_NA(values, is_NAs, origins)

# NA_action may have changed the number of rows.

if new_values:

num_rows = new_values[0].shape[0]

if return_type == "dataframe" and num_rows is not None:

pandas_index = new_values.pop()

factor_info_to_values = dict(zip(factor_info_to_values, new_values))

# Build factor values into matrices

results = []

for design_info in design_infos:

results.append(_build_design_matrix(design_info,

factor_info_to_values,

dtype))

matrices = []

for need_reshape, matrix in results:

if need_reshape:

# There is no data-dependence, at all -- a formula like "1 ~ 1".

# In this case the builder just returns a single-row matrix, and

# we have to broadcast it vertically to the appropriate size. If

# we can figure out what that is...

assert matrix.shape[0] == 1

if num_rows is not None:

matrix = DesignMatrix(np.repeat(matrix, num_rows, axis=0),

matrix.design_info)

else:

raise PatsyError(

"No design matrix has any non-trivial factors, "

"the data object is not a DataFrame. "

"I can't tell how many rows the design matrix should "

"have!"

)

matrices.append(matrix)

if return_type == "dataframe":

assert have_pandas

for i, matrix in enumerate(matrices):

di = matrix.design_info

matrices[i] = pandas.DataFrame(matrix,

columns=di.column_names,

index=pandas_index)

matrices[i].design_info = di