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from collections import defaultdict as _defaultdict
from collections.abc import Mapping
import os
from cytoolz.dicttoolz import (merge, merge_with, valmap, keymap, update_in,
assoc, dissoc, keyfilter, valfilter, itemmap,
itemfilter, assoc_in)
from cytoolz.functoolz import identity
from cytoolz.utils import raises
def inc(x):
return x + 1
def iseven(i):
return i % 2 == 0
class TestDict(object):
"""Test typical usage: dict inputs, no factory keyword.
Class attributes:
D: callable that inputs a dict and creates or returns a MutableMapping
kw: kwargs dict to specify "factory" keyword (if applicable)
"""
D = dict
kw = {}
def test_merge(self):
D, kw = self.D, self.kw
assert merge(D({1: 1, 2: 2}), D({3: 4}), **kw) == D({1: 1, 2: 2, 3: 4})
def test_merge_iterable_arg(self):
D, kw = self.D, self.kw
assert merge([D({1: 1, 2: 2}), D({3: 4})], **kw) == D({1: 1, 2: 2, 3: 4})
def test_merge_with(self):
D, kw = self.D, self.kw
dicts = D({1: 1, 2: 2}), D({1: 10, 2: 20})
assert merge_with(sum, *dicts, **kw) == D({1: 11, 2: 22})
assert merge_with(tuple, *dicts, **kw) == D({1: (1, 10), 2: (2, 20)})
dicts = D({1: 1, 2: 2, 3: 3}), D({1: 10, 2: 20})
assert merge_with(sum, *dicts, **kw) == D({1: 11, 2: 22, 3: 3})
assert merge_with(tuple, *dicts, **kw) == D({1: (1, 10), 2: (2, 20), 3: (3,)})
assert not merge_with(sum)
def test_merge_with_iterable_arg(self):
D, kw = self.D, self.kw
dicts = D({1: 1, 2: 2}), D({1: 10, 2: 20})
assert merge_with(sum, *dicts, **kw) == D({1: 11, 2: 22})
assert merge_with(sum, dicts, **kw) == D({1: 11, 2: 22})
assert merge_with(sum, iter(dicts), **kw) == D({1: 11, 2: 22})
def test_valmap(self):
D, kw = self.D, self.kw
assert valmap(inc, D({1: 1, 2: 2}), **kw) == D({1: 2, 2: 3})
def test_keymap(self):
D, kw = self.D, self.kw
assert keymap(inc, D({1: 1, 2: 2}), **kw) == D({2: 1, 3: 2})
def test_itemmap(self):
D, kw = self.D, self.kw
assert itemmap(reversed, D({1: 2, 2: 4}), **kw) == D({2: 1, 4: 2})
def test_valfilter(self):
D, kw = self.D, self.kw
assert valfilter(iseven, D({1: 2, 2: 3}), **kw) == D({1: 2})
def test_keyfilter(self):
D, kw = self.D, self.kw
assert keyfilter(iseven, D({1: 2, 2: 3}), **kw) == D({2: 3})
def test_itemfilter(self):
D, kw = self.D, self.kw
assert itemfilter(lambda item: iseven(item[0]), D({1: 2, 2: 3}), **kw) == D({2: 3})
assert itemfilter(lambda item: iseven(item[1]), D({1: 2, 2: 3}), **kw) == D({1: 2})
def test_assoc(self):
D, kw = self.D, self.kw
assert assoc(D({}), "a", 1, **kw) == D({"a": 1})
assert assoc(D({"a": 1}), "a", 3, **kw) == D({"a": 3})
assert assoc(D({"a": 1}), "b", 3, **kw) == D({"a": 1, "b": 3})
# Verify immutability:
d = D({'x': 1})
oldd = d
assoc(d, 'x', 2, **kw)
assert d is oldd
def test_dissoc(self):
D, kw = self.D, self.kw
assert dissoc(D({"a": 1}), "a", **kw) == D({})
assert dissoc(D({"a": 1, "b": 2}), "a", **kw) == D({"b": 2})
assert dissoc(D({"a": 1, "b": 2}), "b", **kw) == D({"a": 1})
assert dissoc(D({"a": 1, "b": 2}), "a", "b", **kw) == D({})
assert dissoc(D({"a": 1}), "a", **kw) == dissoc(dissoc(D({"a": 1}), "a", **kw), "a", **kw)
# Verify immutability:
d = D({'x': 1})
oldd = d
d2 = dissoc(d, 'x', **kw)
assert d is oldd
assert d2 is not oldd
def test_assoc_in(self):
D, kw = self.D, self.kw
assert assoc_in(D({"a": 1}), ["a"], 2, **kw) == D({"a": 2})
assert (assoc_in(D({"a": D({"b": 1})}), ["a", "b"], 2, **kw) ==
D({"a": D({"b": 2})}))
assert assoc_in(D({}), ["a", "b"], 1, **kw) == D({"a": D({"b": 1})})
# Verify immutability:
d = D({'x': 1})
oldd = d
d2 = assoc_in(d, ['x'], 2, **kw)
assert d is oldd
assert d2 is not oldd
def test_update_in(self):
D, kw = self.D, self.kw
assert update_in(D({"a": 0}), ["a"], inc, **kw) == D({"a": 1})
assert update_in(D({"a": 0, "b": 1}), ["b"], str, **kw) == D({"a": 0, "b": "1"})
assert (update_in(D({"t": 1, "v": D({"a": 0})}), ["v", "a"], inc, **kw) ==
D({"t": 1, "v": D({"a": 1})}))
# Handle one missing key.
assert update_in(D({}), ["z"], str, None, **kw) == D({"z": "None"})
assert update_in(D({}), ["z"], inc, 0, **kw) == D({"z": 1})
assert update_in(D({}), ["z"], lambda x: x+"ar", default="b", **kw) == D({"z": "bar"})
# Same semantics as Clojure for multiple missing keys, ie. recursively
# create nested empty dictionaries to the depth specified by the
# keys with the innermost value set to f(default).
assert update_in(D({}), [0, 1], inc, default=-1, **kw) == D({0: D({1: 0})})
assert update_in(D({}), [0, 1], str, default=100, **kw) == D({0: D({1: "100"})})
assert (update_in(D({"foo": "bar", 1: 50}), ["d", 1, 0], str, 20, **kw) ==
D({"foo": "bar", 1: 50, "d": D({1: D({0: "20"})})}))
# Verify immutability:
d = D({'x': 1})
oldd = d
update_in(d, ['x'], inc, **kw)
assert d is oldd
def test_factory(self):
D, kw = self.D, self.kw
assert merge(defaultdict(int, D({1: 2})), D({2: 3})) == {1: 2, 2: 3}
assert (merge(defaultdict(int, D({1: 2})), D({2: 3}),
factory=lambda: defaultdict(int)) ==
defaultdict(int, D({1: 2, 2: 3})))
assert not (merge(defaultdict(int, D({1: 2})), D({2: 3}),
factory=lambda: defaultdict(int)) == {1: 2, 2: 3})
assert raises(TypeError, lambda: merge(D({1: 2}), D({2: 3}), factoryy=dict))
class defaultdict(_defaultdict):
def __eq__(self, other):
return (super(defaultdict, self).__eq__(other) and
isinstance(other, _defaultdict) and
self.default_factory == other.default_factory)
class TestDefaultDict(TestDict):
"""Test defaultdict as input and factory
Class attributes:
D: callable that inputs a dict and creates or returns a MutableMapping
kw: kwargs dict to specify "factory" keyword (if applicable)
"""
@staticmethod
def D(dict_):
return defaultdict(int, dict_)
kw = {'factory': lambda: defaultdict(int)}
class CustomMapping(object):
"""Define methods of the MutableMapping protocol required by dicttoolz"""
def __init__(self, *args, **kwargs):
self._d = dict(*args, **kwargs)
def __getitem__(self, key):
return self._d[key]
def __setitem__(self, key, val):
self._d[key] = val
def __delitem__(self, key):
del self._d[key]
def __iter__(self):
return iter(self._d)
def __len__(self):
return len(self._d)
def __contains__(self, key):
return key in self._d
def __eq__(self, other):
return isinstance(other, CustomMapping) and self._d == other._d
def __ne__(self, other):
return not isinstance(other, CustomMapping) or self._d != other._d
def keys(self):
return self._d.keys()
def values(self):
return self._d.values()
def items(self):
return self._d.items()
def update(self, *args, **kwargs):
self._d.update(*args, **kwargs)
# Unused methods that are part of the MutableMapping protocol
#def get(self, key, *args):
# return self._d.get(key, *args)
#def pop(self, key, *args):
# return self._d.pop(key, *args)
#def popitem(self, key):
# return self._d.popitem()
#def clear(self):
# self._d.clear()
#def setdefault(self, key, *args):
# return self._d.setdefault(self, key, *args)
class TestCustomMapping(TestDict):
"""Test CustomMapping as input and factory
Class attributes:
D: callable that inputs a dict and creates or returns a MutableMapping
kw: kwargs dict to specify "factory" keyword (if applicable)
"""
D = CustomMapping
kw = {'factory': lambda: CustomMapping()}
def test_environ():
# See: https://github.com/pycytoolz/cycytoolz/issues/127
assert keymap(identity, os.environ) == os.environ
assert valmap(identity, os.environ) == os.environ
assert itemmap(identity, os.environ) == os.environ
def test_merge_with_non_dict_mappings():
class Foo(Mapping):
def __init__(self, d):
self.d = d
def __iter__(self):
return iter(self.d)
def __getitem__(self, key):
return self.d[key]
def __len__(self):
return len(self.d)
d = Foo({1: 1})
assert merge(d) is d or merge(d) == {1: 1}
assert merge_with(sum, d) == {1: 1}
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