diff --git a/.vscode/settings.json b/.vscode/settings.json
index ca8b4d10..9f2e66b4 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -20,5 +20,14 @@
   "python.linting.pylintArgs": ["--rcfile", ".pylint.ini"],
   "python.linting.mypyEnabled": true,
   "python.linting.mypyArgs": ["--config-file", ".mypy.ini"],
-  "python.linting.pydocstyleEnabled": true
+  "python.linting.pydocstyleEnabled": true,
+  "python.formatting.provider": "black",
+  "python.formatting.blackPath": ".venv/bin/black",
+  "cSpell.words": [
+    "backends",
+    "dataclass",
+    "dataclasses",
+    "datafile",
+    "datafiles"
+  ]
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 19d393dc..4d5cafd5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 0.4.1 (2019-08-25)
+
+- Fixed a `TypeError` when converting non-builtin attributes.
+
 # 0.4 (2019-06-29)
 
 - Fixed ORM methods for datafiles with relative path patterns.
diff --git a/datafiles/converters/containers.py b/datafiles/converters/containers.py
index 54f3e1aa..2766fac7 100644
--- a/datafiles/converters/containers.py
+++ b/datafiles/converters/containers.py
@@ -145,7 +145,7 @@ def to_python_value(cls, deserialized_data, *, target_object):
 
         for name, converter in cls.CONVERTERS.items():
             if name not in data:
-                data[name] = converter.to_python_value(None)
+                data[name] = converter.to_python_value(None, target_object=None)
 
         new_value = cls.DATACLASS(**data)  # pylint: disable=not-callable
 
diff --git a/poetry.lock b/poetry.lock
index f813b606..191db4c0 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -160,7 +160,7 @@ description = "Code coverage measurement for Python"
 name = "coverage"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, <4"
-version = "4.5.3"
+version = "4.5.4"
 
 [[package]]
 category = "dev"
@@ -239,7 +239,7 @@ description = "Read metadata from Python packages"
 name = "importlib-metadata"
 optional = false
 python-versions = ">=2.7,!=3.0,!=3.1,!=3.2,!=3.3"
-version = "0.18"
+version = "0.19"
 
 [package.dependencies]
 zipp = ">=0.5"
@@ -250,7 +250,7 @@ description = "IPython Kernel for Jupyter"
 name = "ipykernel"
 optional = false
 python-versions = ">=3.4"
-version = "5.1.1"
+version = "5.1.2"
 
 [package.dependencies]
 ipython = ">=5.0.0"
@@ -264,7 +264,7 @@ description = "IPython: Productive Interactive Computing"
 name = "ipython"
 optional = false
 python-versions = ">=3.5"
-version = "7.6.0"
+version = "7.7.0"
 
 [package.dependencies]
 appnope = "*"
@@ -293,13 +293,13 @@ description = "IPython HTML widgets for Jupyter"
 name = "ipywidgets"
 optional = false
 python-versions = "*"
-version = "7.4.2"
+version = "7.5.1"
 
 [package.dependencies]
 ipykernel = ">=4.5.1"
 nbformat = ">=4.2.0"
 traitlets = ">=4.3.1"
-widgetsnbextension = ">=3.4.0,<3.5.0"
+widgetsnbextension = ">=3.5.0,<3.6.0"
 
 [package.dependencies.ipython]
 python = ">=3.3"
@@ -319,10 +319,10 @@ description = "An autocompletion tool for Python that can be used for text edito
 name = "jedi"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.14.0"
+version = "0.15.1"
 
 [package.dependencies]
-parso = ">=0.3.0"
+parso = ">=0.5.0"
 
 [[package]]
 category = "dev"
@@ -341,7 +341,7 @@ description = "An implementation of JSON Schema validation for Python"
 name = "jsonschema"
 optional = false
 python-versions = "*"
-version = "3.0.1"
+version = "3.0.2"
 
 [package.dependencies]
 attrs = ">=17.4.0"
@@ -370,8 +370,8 @@ category = "dev"
 description = "Jupyter protocol implementation and client libraries"
 name = "jupyter-client"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "5.2.4"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "5.3.1"
 
 [package.dependencies]
 jupyter-core = "*"
@@ -412,7 +412,7 @@ description = "A fast and thorough lazy object proxy."
 name = "lazy-object-proxy"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.4.1"
+version = "1.4.2"
 
 [[package]]
 category = "dev"
@@ -491,7 +491,7 @@ description = "More routines for operating on iterables, beyond itertools"
 name = "more-itertools"
 optional = false
 python-versions = ">=3.4"
-version = "7.1.0"
+version = "7.2.0"
 
 [[package]]
 category = "dev"
@@ -519,7 +519,7 @@ description = "Converting Jupyter Notebooks"
 name = "nbconvert"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "5.5.0"
+version = "5.6.0"
 
 [package.dependencies]
 bleach = "*"
@@ -527,7 +527,7 @@ defusedxml = "*"
 entrypoints = ">=0.2.2"
 jinja2 = ">=2.4"
 jupyter-core = "*"
-mistune = ">=0.8.1"
+mistune = ">=0.8.1,<2"
 nbformat = ">=4.4"
 pandocfilters = ">=1.4.1"
 pygments = "*"
@@ -554,7 +554,7 @@ description = "Strips outputs from Jupyter and IPython notebooks"
 name = "nbstripout"
 optional = false
 python-versions = "*"
-version = "0.3.5"
+version = "0.3.6"
 
 [package.dependencies]
 nbformat = "*"
@@ -564,22 +564,22 @@ category = "dev"
 description = "A web-based notebook environment for interactive computing"
 name = "notebook"
 optional = false
-python-versions = "*"
-version = "5.7.8"
+python-versions = ">=3.5"
+version = "6.0.1"
 
 [package.dependencies]
 Send2Trash = "*"
 ipykernel = "*"
 ipython-genutils = "*"
 jinja2 = "*"
-jupyter-client = ">=5.2.0"
+jupyter-client = ">=5.3.1"
 jupyter-core = ">=4.4.0"
 nbconvert = "*"
 nbformat = "*"
 prometheus-client = "*"
 pyzmq = ">=17"
 terminado = ">=0.8.1"
-tornado = ">=4.1,<7"
+tornado = ">=5.0"
 traitlets = ">=4.2.1"
 
 [[package]]
@@ -588,9 +588,10 @@ description = "Core utilities for Python packages"
 name = "packaging"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "19.0"
+version = "19.1"
 
 [package.dependencies]
+attrs = "*"
 pyparsing = ">=2.0.2"
 six = "*"
 
@@ -608,14 +609,13 @@ description = "Parametrize and run Jupyter and nteract Notebooks"
 name = "papermill"
 optional = false
 python-versions = "*"
-version = "1.0.1"
+version = "1.1.0"
 
 [package.dependencies]
 ansiwrap = "*"
 click = "*"
 entrypoints = "*"
 future = "*"
-ipython = ">=5.0"
 jupyter-client = "*"
 nbconvert = ">=5.5"
 nbformat = "*"
@@ -623,7 +623,7 @@ pyyaml = "*"
 requests = "*"
 six = "*"
 tenacity = "*"
-tqdm = ">=4.29.1"
+tqdm = ">=4.32.2"
 
 [[package]]
 category = "main"
@@ -631,7 +631,7 @@ description = "parse() is the opposite of format()"
 name = "parse"
 optional = false
 python-versions = "*"
-version = "1.12.0"
+version = "1.12.1"
 
 [[package]]
 category = "dev"
@@ -639,7 +639,7 @@ description = "A Python Parser"
 name = "parso"
 optional = false
 python-versions = "*"
-version = "0.5.0"
+version = "0.5.1"
 
 [[package]]
 category = "dev"
@@ -722,11 +722,10 @@ category = "dev"
 description = "Python docstring style checker"
 name = "pydocstyle"
 optional = false
-python-versions = "*"
-version = "3.0.0"
+python-versions = ">=3.4"
+version = "4.0.1"
 
 [package.dependencies]
-six = "*"
 snowballstemmer = "*"
 
 [[package]]
@@ -757,7 +756,7 @@ description = "Python parsing module"
 name = "pyparsing"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "2.4.0"
+version = "2.4.2"
 
 [[package]]
 category = "dev"
@@ -765,7 +764,7 @@ description = "Persistent/Functional/Immutable data structures"
 name = "pyrsistent"
 optional = false
 python-versions = "*"
-version = "0.15.2"
+version = "0.15.4"
 
 [package.dependencies]
 six = "*"
@@ -776,19 +775,22 @@ description = "pytest: simple powerful testing with Python"
 name = "pytest"
 optional = false
 python-versions = ">=3.5"
-version = "5.0.0"
+version = "5.1.1"
 
 [package.dependencies]
 atomicwrites = ">=1.0"
 attrs = ">=17.4.0"
 colorama = "*"
-importlib-metadata = ">=0.12"
 more-itertools = ">=4.0.0"
 packaging = "*"
 pluggy = ">=0.12,<1.0"
 py = ">=1.5.0"
 wcwidth = "*"
 
+[package.dependencies.importlib-metadata]
+python = "<3.8"
+version = ">=0.12"
+
 [[package]]
 category = "dev"
 description = "Pytest plugin for measuring coverage."
@@ -906,15 +908,15 @@ description = "YAML parser and emitter for Python"
 name = "pyyaml"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "5.1.1"
+version = "5.1.2"
 
 [[package]]
 category = "dev"
 description = "Python bindings for 0MQ"
 name = "pyzmq"
 optional = false
-python-versions = ">=2.7,!=3.0*,!=3.1*,!=3.2*"
-version = "18.0.2"
+python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*"
+version = "18.1.0"
 
 [[package]]
 category = "dev"
@@ -922,7 +924,7 @@ description = "Jupyter Qt console"
 name = "qtconsole"
 optional = false
 python-versions = "*"
-version = "4.5.1"
+version = "4.5.4"
 
 [package.dependencies]
 ipykernel = ">=4.1"
@@ -952,7 +954,7 @@ description = "ruamel.yaml is a YAML parser/emitter that supports roundtrip pres
 name = "ruamel.yaml"
 optional = false
 python-versions = "*"
-version = "0.15.97"
+version = "0.15.100"
 
 [[package]]
 category = "dev"
@@ -984,7 +986,7 @@ description = "Retry code until it succeeeds"
 name = "tenacity"
 optional = false
 python-versions = "*"
-version = "5.0.4"
+version = "5.1.1"
 
 [package.dependencies]
 six = ">=1.9.0"
@@ -1032,7 +1034,7 @@ description = "Style preserving TOML library"
 name = "tomlkit"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.5.3"
+version = "0.5.5"
 
 [[package]]
 category = "dev"
@@ -1048,7 +1050,7 @@ description = "Fast, Extensible Progress Meter"
 name = "tqdm"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*"
-version = "4.32.2"
+version = "4.35.0"
 
 [[package]]
 category = "dev"
@@ -1077,7 +1079,7 @@ description = "Type Hints for Python"
 name = "typing"
 optional = false
 python-versions = "*"
-version = "3.7.4"
+version = "3.7.4.1"
 
 [[package]]
 category = "main"
@@ -1133,7 +1135,7 @@ description = "IPython HTML widgets for Jupyter"
 name = "widgetsnbextension"
 optional = false
 python-versions = "*"
-version = "3.4.2"
+version = "3.5.1"
 
 [package.dependencies]
 notebook = ">=4.4.1"
@@ -1152,7 +1154,10 @@ description = "Backport of pathlib-compatible object wrapper for zip files"
 name = "zipp"
 optional = false
 python-versions = ">=2.7"
-version = "0.5.1"
+version = "0.6.0"
+
+[package.dependencies]
+more-itertools = "*"
 
 [metadata]
 content-hash = "3e5c67929b514df302fcb476ba09636c862a0cc54fbfbca3febfbf0098583d1f"
@@ -1176,7 +1181,7 @@ chardet = ["84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae", "
 classproperties = ["97d627d11df056838a9426ff15be71a5a365bca456afba8122740c39c527d5b4"]
 click = ["2335065e6395b9e67ca716de5f7526736bfa6ceead690adf616d925bdc622b13", "5b94b49521f6456670fdb30cd82a4eca9412788a93fa6dd6df72c94d5a8ff2d7"]
 colorama = ["463f8483208e921368c9f306094eb6f725c6ca42b0f97e313cb5d5512459feda", "48eb22f4f8461b1df5734a074b57042430fb06e1d61bd1e11b078c0fe6d7a1f1"]
-coverage = ["0c5fe441b9cfdab64719f24e9684502a59432df7570521563d7b1aff27ac755f", "2b412abc4c7d6e019ce7c27cbc229783035eef6d5401695dccba80f481be4eb3", "3684fabf6b87a369017756b551cef29e505cb155ddb892a7a29277b978da88b9", "39e088da9b284f1bd17c750ac672103779f7954ce6125fd4382134ac8d152d74", "3c205bc11cc4fcc57b761c2da73b9b72a59f8d5ca89979afb0c1c6f9e53c7390", "42692db854d13c6c5e9541b6ffe0fe921fe16c9c446358d642ccae1462582d3b", "465ce53a8c0f3a7950dfb836438442f833cf6663d407f37d8c52fe7b6e56d7e8", "48020e343fc40f72a442c8a1334284620f81295256a6b6ca6d8aa1350c763bbe", "4ec30ade438d1711562f3786bea33a9da6107414aed60a5daa974d50a8c2c351", "5296fc86ab612ec12394565c500b412a43b328b3907c0d14358950d06fd83baf", "5f61bed2f7d9b6a9ab935150a6b23d7f84b8055524e7be7715b6513f3328138e", "6899797ac384b239ce1926f3cb86ffc19996f6fa3a1efbb23cb49e0c12d8c18c", "68a43a9f9f83693ce0414d17e019daee7ab3f7113a70c79a3dd4c2f704e4d741", "6b8033d47fe22506856fe450470ccb1d8ba1ffb8463494a15cfc96392a288c09", "7ad7536066b28863e5835e8cfeaa794b7fe352d99a8cded9f43d1161be8e9fbd", "7bacb89ccf4bedb30b277e96e4cc68cd1369ca6841bde7b005191b54d3dd1034", "839dc7c36501254e14331bcb98b27002aa415e4af7ea039d9009409b9d2d5420", "8e679d1bde5e2de4a909efb071f14b472a678b788904440779d2c449c0355b27", "8f9a95b66969cdea53ec992ecea5406c5bd99c9221f539bca1e8406b200ae98c", "932c03d2d565f75961ba1d3cec41ddde00e162c5b46d03f7423edcb807734eab", "93f965415cc51604f571e491f280cff0f5be35895b4eb5e55b47ae90c02a497b", "988529edadc49039d205e0aa6ce049c5ccda4acb2d6c3c5c550c17e8c02c05ba", "998d7e73548fe395eeb294495a04d38942edb66d1fa61eb70418871bc621227e", "9de60893fb447d1e797f6bf08fdf0dbcda0c1e34c1b06c92bd3a363c0ea8c609", "9e80d45d0c7fcee54e22771db7f1b0b126fb4a6c0a2e5afa72f66827207ff2f2", "a545a3dfe5082dc8e8c3eb7f8a2cf4f2870902ff1860bd99b6198cfd1f9d1f49", "a5d8f29e5ec661143621a8f4de51adfb300d7a476224156a39a392254f70687b", "a9abc8c480e103dc05d9b332c6cc9fb1586330356fc14f1aa9c0ca5745097d19", "aca06bfba4759bbdb09bf52ebb15ae20268ee1f6747417837926fae990ebc41d", "bb23b7a6fd666e551a3094ab896a57809e010059540ad20acbeec03a154224ce", "bfd1d0ae7e292105f29d7deaa9d8f2916ed8553ab9d5f39ec65bcf5deadff3f9", "c22ab9f96cbaff05c6a84e20ec856383d27eae09e511d3e6ac4479489195861d", "c62ca0a38958f541a73cf86acdab020c2091631c137bd359c4f5bddde7b75fd4", "c709d8bda72cf4cd348ccec2a4881f2c5848fd72903c185f363d361b2737f773", "c968a6aa7e0b56ecbd28531ddf439c2ec103610d3e2bf3b75b813304f8cb7723", "ca58eba39c68010d7e87a823f22a081b5290e3e3c64714aac3c91481d8b34d22", "df785d8cb80539d0b55fd47183264b7002077859028dfe3070cf6359bf8b2d9c", "f406628ca51e0ae90ae76ea8398677a921b36f0bd71aab2099dfed08abd0322f", "f46087bbd95ebae244a0eda01a618aff11ec7a069b15a3ef8f6b520db523dcf1", "f8019c5279eb32360ca03e9fac40a12667715546eed5c5eb59eb381f2f501260", "fc5f4d209733750afd2714e9109816a29500718b32dd9a5db01c0cb3a019b96a"]
+coverage = ["08907593569fe59baca0bf152c43f3863201efb6113ecb38ce7e97ce339805a6", "0be0f1ed45fc0c185cfd4ecc19a1d6532d72f86a2bac9de7e24541febad72650", "141f08ed3c4b1847015e2cd62ec06d35e67a3ac185c26f7635f4406b90afa9c5", "19e4df788a0581238e9390c85a7a09af39c7b539b29f25c89209e6c3e371270d", "23cc09ed395b03424d1ae30dcc292615c1372bfba7141eb85e11e50efaa6b351", "245388cda02af78276b479f299bbf3783ef0a6a6273037d7c60dc73b8d8d7755", "331cb5115673a20fb131dadd22f5bcaf7677ef758741312bee4937d71a14b2ef", "386e2e4090f0bc5df274e720105c342263423e77ee8826002dcffe0c9533dbca", "3a794ce50daee01c74a494919d5ebdc23d58873747fa0e288318728533a3e1ca", "60851187677b24c6085248f0a0b9b98d49cba7ecc7ec60ba6b9d2e5574ac1ee9", "63a9a5fc43b58735f65ed63d2cf43508f462dc49857da70b8980ad78d41d52fc", "6b62544bb68106e3f00b21c8930e83e584fdca005d4fffd29bb39fb3ffa03cb5", "6ba744056423ef8d450cf627289166da65903885272055fb4b5e113137cfa14f", "7494b0b0274c5072bddbfd5b4a6c6f18fbbe1ab1d22a41e99cd2d00c8f96ecfe", "826f32b9547c8091679ff292a82aca9c7b9650f9fda3e2ca6bf2ac905b7ce888", "93715dffbcd0678057f947f496484e906bf9509f5c1c38fc9ba3922893cda5f5", "9a334d6c83dfeadae576b4d633a71620d40d1c379129d587faa42ee3e2a85cce", "af7ed8a8aa6957aac47b4268631fa1df984643f07ef00acd374e456364b373f5", "bf0a7aed7f5521c7ca67febd57db473af4762b9622254291fbcbb8cd0ba5e33e", "bf1ef9eb901113a9805287e090452c05547578eaab1b62e4ad456fcc049a9b7e", "c0afd27bc0e307a1ffc04ca5ec010a290e49e3afbe841c5cafc5c5a80ecd81c9", "dd579709a87092c6dbee09d1b7cfa81831040705ffa12a1b248935274aee0437", "df6712284b2e44a065097846488f66840445eb987eb81b3cc6e4149e7b6982e1", "e07d9f1a23e9e93ab5c62902833bf3e4b1f65502927379148b6622686223125c", "e2ede7c1d45e65e209d6093b762e98e8318ddeff95317d07a27a2140b80cfd24", "e4ef9c164eb55123c62411f5936b5c2e521b12356037b6e1c2617cef45523d47", "eca2b7343524e7ba246cab8ff00cab47a2d6d54ada3b02772e908a45675722e2", "eee64c616adeff7db37cc37da4180a3a5b6177f5c46b187894e633f088fb5b28", "ef824cad1f980d27f26166f86856efe11eff9912c4fed97d3804820d43fa550c", "efc89291bd5a08855829a3c522df16d856455297cf35ae827a37edac45f466a7", "fa964bae817babece5aa2e8c1af841bebb6d0b9add8e637548809d040443fee0", "ff37757e068ae606659c28c3bd0d923f9d29a85de79bf25b2b34b148473b5025"]
 coveragespace = ["498b54ec158a19e1f5647da681dc77fd9d17df11ecff1253d60ac7970209f6e5", "7c5ce4641e0f995b9be0e8b53401fd7b6d17db1b8c23bfd06f0c845ad0de5b5f"]
 decorator = ["86156361c50488b84a3f148056ea716ca587df2f0de1d34750d35c21312725de", "f069f3a01830ca754ba5258fde2278454a0b5b79e0d7f5c13b3b97e57d4acff6"]
 defusedxml = ["6687150770438374ab581bb7a1b327a847dd9c5749e396102de3fad4e8a3ef93", "f684034d135af4c6cbb949b8a4d2ed61634515257a67299e5f940fbaa34377f5"]
@@ -1185,20 +1190,20 @@ entrypoints = ["589f874b313739ad35be6e0cd7efde2a4e9b6fea91edcc34e58ecbb8dbe56d19
 future = ["67045236dcfd6816dc439556d009594abf643e5eb48992e36beac09c2ca659b8"]
 gprof2dot = ["cebc7aa2782fd813ead415ea1fae3409524343485eadc7fb60ef5bd1e810309e"]
 idna = ["c357b3f628cf53ae2c4c05627ecc484553142ca23264e593d327bcde5e9c3407", "ea8b7f6188e6fa117537c3df7da9fc686d485087abf6ac197f9c46432f7e4a3c"]
-importlib-metadata = ["6dfd58dfe281e8d240937776065dd3624ad5469c835248219bd16cf2e12dbeb7", "cb6ee23b46173539939964df59d3d72c3e0c1b5d54b84f1d8a7e912fe43612db"]
-ipykernel = ["346189536b88859937b5f4848a6fd85d1ad0729f01724a411de5cae9b618819c", "f0e962052718068ad3b1d8bcc703794660858f58803c3798628817f492a8769c"]
-ipython = ["0806894ae78ddb94b530514acc9ab03a928b79374d8630470b439b58383dd7ee", "263376e672c7f104fb971c9e1f372441bb34d66dfb7323062f62aa21fa46a377"]
+importlib-metadata = ["23d3d873e008a513952355379d93cbcab874c58f4f034ff657c7a87422fa64e8", "80d2de76188eabfbfcf27e6a37342c2827801e59c4cc14b0371c56fed43820e3"]
+ipykernel = ["167c3ef08450f5e060b76c749905acb0e0fbef9365899377a4a1eae728864383", "b503913e0b4cce7ed2de965457dfb2edd633e8234161a60e23f2fe2161345d12"]
+ipython = ["1d3a1692921e932751bc1a1f7bb96dc38671eeefdc66ed33ee4cbc57e92a410e", "537cd0176ff6abd06ef3e23f2d0c4c2c8a4d9277b7451544c6cbf56d1c79a83d"]
 ipython-genutils = ["72dd37233799e619666c9f639a9da83c34013a73e8bbc79a7a6348d93c61fab8", "eb2e116e75ecef9d4d228fdc66af54269afa26ab4463042e33785b887c628ba8"]
-ipywidgets = ["0f2b5cde9f272cb49d52f3f0889fdd1a7ae1e74f37b48dac35a83152780d2b7b", "a3e224f430163f767047ab9a042fc55adbcab0c24bbe6cf9f306c4f89fdf0ba3"]
+ipywidgets = ["13ffeca438e0c0f91ae583dc22f50379b9d6b28390ac7be8b757140e9a771516", "e945f6e02854a74994c596d9db83444a1850c01648f1574adf144fbbabe05c97"]
 isort = ["1153601da39a25b14ddc54955dbbacbb6b2d19135386699e2ad58517953b34af", "b9c40e9750f3d77e6e4d441d8b0266cf555e7cdabdcff33c4fd06366ca761ef8", "ec9ef8f4a9bc6f71eec99e1806bfa2de401650d996c59330782b89a5555c1497"]
-jedi = ["49ccb782651bb6f7009810d17a3316f8867dde31654c750506970742e18b553d", "79d0f6595f3846dffcbe667cc6dc821b96e5baa8add125176c31a3917eb19d58"]
+jedi = ["786b6c3d80e2f06fd77162a07fed81b8baa22dde5d62896a790a331d6ac21a27", "ba859c74fa3c966a22f2aeebe1b74ee27e2a462f56d3f5f7ca4a59af61bfe42e"]
 jinja2 = ["065c4f02ebe7f7cf559e49ee5a95fb800a9e4528727aec6f24402a5374c65013", "14dd6caf1527abb21f08f86c784eac40853ba93edb79552aa1e4b8aef1b61c7b"]
-jsonschema = ["0c0a81564f181de3212efa2d17de1910f8732fa1b71c42266d983cd74304e20d", "a5f6559964a3851f59040d3b961de5e68e70971afb88ba519d27e6a039efff1a"]
+jsonschema = ["5f9c0a719ca2ce14c5de2fd350a64fd2d13e8539db29836a86adc990bb1a068f", "8d4a2b7b6c2237e0199c8ea1a6d3e05bf118e289ae2b9d7ba444182a2959560d"]
 jupyter = ["3e1f86076bbb7c8c207829390305a2b1fe836d471ed54be66a3b8c41e7f46cc7", "5b290f93b98ffbc21c0c7e749f054b3267782166d72fa5e3ed1ed4eaf34a2b78", "d9dc4b3318f310e34c82951ea5d6683f67bed7def4b259fafbfe4f1beb1d8e5f"]
-jupyter-client = ["b5f9cb06105c1d2d30719db5ffb3ea67da60919fb68deaefa583deccd8813551", "c44411eb1463ed77548bc2d5ec0d744c9b81c4a542d9637c7a52824e2121b987"]
+jupyter-client = ["73a809a2964afa07adcc1521537fddb58c2ffbb7e84d53dc5901cf80480465b3", "98e8af5edff5d24e4d31e73bc21043130ae9d955a91aa93fc0bc3b1d0f7b5880"]
 jupyter-console = ["308ce876354924fb6c540b41d5d6d08acfc946984bf0c97777c1ddcb42e0b2f5", "cc80a97a5c389cbd30252ffb5ce7cefd4b66bde98219edd16bf5cb6f84bb3568"]
 jupyter-core = ["2c6e7c1e9f2ac45b5c2ceea5730bc9008d92fe59d0725eac57b04c0edfba24f7", "f4fa22d6cf25f34807c995f22d2923693575c70f02557bcbfbe59bd5ec8d8b84"]
-lazy-object-proxy = ["159a745e61422217881c4de71f9eafd9d703b93af95618635849fe469a283661", "23f63c0821cc96a23332e45dfaa83266feff8adc72b9bcaef86c202af765244f", "3b11be575475db2e8a6e11215f5aa95b9ec14de658628776e10d96fa0b4dac13", "3f447aff8bc61ca8b42b73304f6a44fa0d915487de144652816f950a3f1ab821", "4ba73f6089cd9b9478bc0a4fa807b47dbdb8fad1d8f31a0f0a5dbf26a4527a71", "4f53eadd9932055eac465bd3ca1bd610e4d7141e1278012bd1f28646aebc1d0e", "64483bd7154580158ea90de5b8e5e6fc29a16a9b4db24f10193f0c1ae3f9d1ea", "6f72d42b0d04bfee2397aa1862262654b56922c20a9bb66bb76b6f0e5e4f9229", "7c7f1ec07b227bdc561299fa2328e85000f90179a2f44ea30579d38e037cb3d4", "7c8b1ba1e15c10b13cad4171cfa77f5bb5ec2580abc5a353907780805ebe158e", "8559b94b823f85342e10d3d9ca4ba5478168e1ac5658a8a2f18c991ba9c52c20", "a262c7dfb046f00e12a2bdd1bafaed2408114a89ac414b0af8755c696eb3fc16", "acce4e3267610c4fdb6632b3886fe3f2f7dd641158a843cf6b6a68e4ce81477b", "be089bb6b83fac7f29d357b2dc4cf2b8eb8d98fe9d9ff89f9ea6012970a853c7", "bfab710d859c779f273cc48fb86af38d6e9210f38287df0069a63e40b45a2f5c", "c10d29019927301d524a22ced72706380de7cfc50f767217485a912b4c8bd82a", "dd6e2b598849b3d7aee2295ac765a578879830fb8966f70be8cd472e6069932e", "e408f1eacc0a68fed0c08da45f31d0ebb38079f043328dce69ff133b95c29dc1"]
+lazy-object-proxy = ["02b260c8deb80db09325b99edf62ae344ce9bc64d68b7a634410b8e9a568edbf", "18f9c401083a4ba6e162355873f906315332ea7035803d0fd8166051e3d402e3", "1f2c6209a8917c525c1e2b55a716135ca4658a3042b5122d4e3413a4030c26ce", "2f06d97f0ca0f414f6b707c974aaf8829c2292c1c497642f63824119d770226f", "616c94f8176808f4018b39f9638080ed86f96b55370b5a9463b2ee5c926f6c5f", "63b91e30ef47ef68a30f0c3c278fbfe9822319c15f34b7538a829515b84ca2a0", "77b454f03860b844f758c5d5c6e5f18d27de899a3db367f4af06bec2e6013a8e", "83fe27ba321e4cfac466178606147d3c0aa18e8087507caec78ed5a966a64905", "84742532d39f72df959d237912344d8a1764c2d03fe58beba96a87bfa11a76d8", "874ebf3caaf55a020aeb08acead813baf5a305927a71ce88c9377970fe7ad3c2", "9f5caf2c7436d44f3cec97c2fa7791f8a675170badbfa86e1992ca1b84c37009", "a0c8758d01fcdfe7ae8e4b4017b13552efa7f1197dd7358dc9da0576f9d0328a", "a4def978d9d28cda2d960c279318d46b327632686d82b4917516c36d4c274512", "ad4f4be843dace866af5fc142509e9b9817ca0c59342fdb176ab6ad552c927f5", "ae33dd198f772f714420c5ab698ff05ff900150486c648d29951e9c70694338e", "b4a2b782b8a8c5522ad35c93e04d60e2ba7f7dcb9271ec8e8c3e08239be6c7b4", "c462eb33f6abca3b34cdedbe84d761f31a60b814e173b98ede3c81bb48967c4f", "fd135b8d35dfdcdb984828c84d695937e58cc5f49e1c854eb311c4d6aa03f4f1"]
 livereload = ["78d55f2c268a8823ba499305dcac64e28ddeb9a92571e12d543cd304faf5817b", "89254f78d7529d7ea0a3417d224c34287ebfe266b05e67e51facaf82c27f0f66"]
 markdown = ["2e50876bcdd74517e7b71f3e7a76102050edec255b3983403f1a63e7c8a41e7a", "56a46ac655704b91e5b7e6326ce43d5ef72411376588afa1dd90e881b83c7e8c"]
 markupsafe = ["00bc623926325b26bb9605ae9eae8a215691f33cae5df11ca5424f06f2d1f473", "09027a7803a62ca78792ad89403b1b7a73a01c8cb65909cd876f7fcebd79b161", "09c4b7f37d6c648cb13f9230d847adf22f8171b1ccc4d5682398e77f40309235", "1027c282dad077d0bae18be6794e6b6b8c91d58ed8a8d89a89d59693b9131db5", "24982cc2533820871eba85ba648cd53d8623687ff11cbb805be4ff7b4c971aff", "29872e92839765e546828bb7754a68c418d927cd064fd4708fab9fe9c8bb116b", "43a55c2930bbc139570ac2452adf3d70cdbb3cfe5912c71cdce1c2c6bbd9c5d1", "46c99d2de99945ec5cb54f23c8cd5689f6d7177305ebff350a58ce5f8de1669e", "500d4957e52ddc3351cabf489e79c91c17f6e0899158447047588650b5e69183", "535f6fc4d397c1563d08b88e485c3496cf5784e927af890fb3c3aac7f933ec66", "62fe6c95e3ec8a7fad637b7f3d372c15ec1caa01ab47926cfdf7a75b40e0eac1", "6dd73240d2af64df90aa7c4e7481e23825ea70af4b4922f8ede5b9e35f78a3b1", "717ba8fe3ae9cc0006d7c451f0bb265ee07739daf76355d06366154ee68d221e", "79855e1c5b8da654cf486b830bd42c06e8780cea587384cf6545b7d9ac013a0b", "7c1699dfe0cf8ff607dbdcc1e9b9af1755371f92a68f706051cc8c37d447c905", "88e5fcfb52ee7b911e8bb6d6aa2fd21fbecc674eadd44118a9cc3863f938e735", "8defac2f2ccd6805ebf65f5eeb132adcf2ab57aa11fdf4c0dd5169a004710e7d", "98c7086708b163d425c67c7a91bad6e466bb99d797aa64f965e9d25c12111a5e", "9add70b36c5666a2ed02b43b335fe19002ee5235efd4b8a89bfcf9005bebac0d", "9bf40443012702a1d2070043cb6291650a0841ece432556f784f004937f0f32c", "ade5e387d2ad0d7ebf59146cc00c8044acbd863725f887353a10df825fc8ae21", "b00c1de48212e4cc9603895652c5c410df699856a2853135b3967591e4beebc2", "b1282f8c00509d99fef04d8ba936b156d419be841854fe901d8ae224c59f0be5", "b2051432115498d3562c084a49bba65d97cf251f5a331c64a12ee7e04dacc51b", "ba59edeaa2fc6114428f1637ffff42da1e311e29382d81b339c1817d37ec93c6", "c8716a48d94b06bb3b2524c2b77e055fb313aeb4ea620c8dd03a105574ba704f", "cd5df75523866410809ca100dc9681e301e3c27567cf498077e8551b6d20e42f", "e249096428b3ae81b08327a63a485ad0878de3fb939049038579ac0ef61e17e7"]
@@ -1206,18 +1211,18 @@ mccabe = ["ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42", "d
 minilog = ["226f7c40f9857ef1d86e659b27720476699045b9e619846fed8e5f378407bee7", "d6b1f769bf548e7c9a8223eb008514dbc5f9b4764fec3e132bed0d585bb1b6e8"]
 mistune = ["59a3429db53c50b5c6bcc8a07f8848cb00d7dc8bdb431a4ab41920d201d4756e", "88a1051873018da288eee8538d476dffe1262495144b33ecb586c4ab266bb8d4"]
 mkdocs = ["17d34329aad75d5de604b9ed4e31df3a4d235afefdc46ce7b1964fddb2e1e939", "8cc8b38325456b9e942c981a209eaeb1e9f3f77b493ad755bfef889b9c8d356a"]
-more-itertools = ["3ad685ff8512bf6dc5a8b82ebf73543999b657eded8c11803d9ba6b648986f4d", "8bb43d1f51ecef60d81854af61a3a880555a14643691cc4b64a6ee269c78f09a"]
+more-itertools = ["409cd48d4db7052af495b09dec721011634af3753ae1ef92d2b32f73a745f832", "92b8c4b06dac4f0611c0729b2f2ede52b2e1bac1ab48f089c7ddc12e26bb60c4"]
 mypy = ["2afe51527b1f6cdc4a5f34fc90473109b22bf7f21086ba3e9451857cf11489e6", "56a16df3e0abb145d8accd5dbb70eba6c4bd26e2f89042b491faa78c9635d1e2", "5764f10d27b2e93c84f70af5778941b8f4aa1379b2430f85c827e0f5464e8714", "5bbc86374f04a3aa817622f98e40375ccb28c4836f36b66706cf3c6ccce86eda", "6a9343089f6377e71e20ca734cd8e7ac25d36478a9df580efabfe9059819bf82", "6c9851bc4a23dc1d854d3f5dfd5f20a016f8da86bcdbb42687879bb5f86434b0", "b8e85956af3fcf043d6f87c91cbe8705073fc67029ba6e22d3468bfee42c4823", "b9a0af8fae490306bc112229000aa0c2ccc837b49d29a5c42e088c132a2334dd", "bbf643528e2a55df2c1587008d6e3bda5c0445f1240dfa85129af22ae16d7a9a", "c46ab3438bd21511db0f2c612d89d8344154c0c9494afc7fbc932de514cf8d15", "f7a83d6bd805855ef83ec605eb01ab4fa42bcef254b13631e451cbb44914a9b0"]
 mypy-extensions = ["37e0e956f41369209a3d5f34580150bcacfabaa57b33a15c0b25f4b5725e0812", "b16cabe759f55e3409a7d231ebd2841378fb0c27a5d1994719e340e4f429ac3e"]
-nbconvert = ["138381baa41d83584459b5cfecfc38c800ccf1f37d9ddd0bd440783346a4c39c", "4a978548d8383f6b2cfca4a3b0543afb77bc7cb5a96e8b424337ab58c12da9bc"]
+nbconvert = ["427a468ec26e7d68a529b95f578d5cbf018cb4c1f889e897681c2b6d11897695", "48d3c342057a2cf21e8df820d49ff27ab9f25fc72b8f15606bd47967333b2709"]
 nbformat = ["b9a0dbdbd45bb034f4f8893cafd6f652ea08c8c1674ba83f2dc55d3955743b0b", "f7494ef0df60766b7cabe0a3651556345a963b74dbc16bc7c18479041170d402"]
-nbstripout = ["814efbe00988445b2c3f3d1944c9f296a556e2b14a060f7b25372881c2e497d4", "8f085e26e60e9d9c0710748510d1c763c8f63905cb16df7658b35a2936e8ca2b"]
-notebook = ["573e0ae650c5d76b18b6e564ba6d21bf321d00847de1d215b418acb64f056eb8", "f64fa6624d2323fbef6210a621817d6505a45d0d4a9367f1843b20a38a4666ee"]
-packaging = ["0c98a5d0be38ed775798ece1b9727178c4469d9c3b4ada66e8e6b7849f8732af", "9e1cbf8c12b1f1ce0bb5344b8d7ecf66a6f8a6e91bcb0c84593ed6d3ab5c4ab3"]
+nbstripout = ["1960caf7d1c1e281126c6c5cb98053db89eca8aaa616b58eed381e3e1508c0f4", "d35c553f724d3fb7ec9e9602c6e55a75101064a6bbec4f8c28e8c84d6e3dd060"]
+notebook = ["660976fe4fe45c7aa55e04bf4bccb9f9566749ff637e9020af3422f9921f9a5d", "b0a290f5cc7792d50a21bec62b3c221dd820bf00efa916ce9aeec4b5354bde20"]
+packaging = ["a7ac867b97fdc07ee80a8058fe4435ccd274ecc3b0ed61d852d7d53055528cf9", "c491ca87294da7cc01902edbe30a5bc6c4c28172b5138ab4e4aa1b9d7bfaeafe"]
 pandocfilters = ["b3dd70e169bb5449e6bc6ff96aea89c5eea8c5f6ab5e207fc2f521a2cf4a0da9"]
-papermill = ["1c565e1fe7a99aeb5c4ebe1035d2c8f17c10999256df85bd427160154ca86d2f", "e9a2b532550bb92fc72d048a1a6125fa0ab6c2b3fde27a8ccfb1981cf074ed2c"]
-parse = ["1b68657434d371e5156048ca4a0c5aea5afc6ca59a2fea4dd1a575354f617142"]
-parso = ["5052bb33be034cba784193e74b1cde6ebf29ae8b8c1e4ad94df0c4209bfc4826", "db5881df1643bf3e66c097bfd8935cf03eae73f4cb61ae4433c9ea4fb6613446"]
+papermill = ["420f0337eab689c8485588fc5ffc71ad21477d0eeb2bece8a548ee43a1661721", "a53a1732a830b83cef5542a94fb13fcf33080cde98f3000534ee914ebe12bc83"]
+parse = ["a5fca7000c6588d77bc65c28f3f21bfce03b5e44daa8f9f07c17fe364990d717"]
+parso = ["63854233e1fadb5da97f2744b6b24346d2750b85965e7e399bec1620232797dc", "666b0ee4a7a1220f65d367617f2cd3ffddff3e205f3f16a0284df30e774c2a9c"]
 pathtools = ["7c35c5421a39bb82e58018febd90e3b6e5db34c5443aaaf742b3f33d4655f1c0"]
 pexpect = ["2094eefdfcf37a1fdbfb9aa090862c1a4878e5c7e0e7e7088bdb511c558e5cd1", "9e2c1fd0e6ee3a49b28f95d4b33bc389c89b20af6a1255906e90ff1262ce62eb"]
 pickleshare = ["87683d47965c1da65cdacaf31c8441d12b8044cdec9aca500cd78fc2c683afca", "9649af414d74d4df115d5d718f82acb59c9d418196b7b4290ed47a12ce62df56"]
@@ -1226,12 +1231,12 @@ prometheus-client = ["71cd24a2b3eb335cb800c7159f423df1bd4dcd5171b234be15e3f31ec9
 prompt-toolkit = ["11adf3389a996a6d45cc277580d0d53e8a5afd281d0c9ec71b28e6f121463780", "2519ad1d8038fd5fc8e770362237ad0364d16a7650fb5724af6997ed5515e3c1", "977c6583ae813a37dc1c2e1b715892461fcbdaa57f6fc62f33a528c4886c8f55"]
 ptyprocess = ["923f299cc5ad920c68f2bc0bc98b75b9f838b93b599941a6b63ddbc2476394c0", "d7cc528d76e76342423ca640335bd3633420dc1366f258cb31d05e865ef5ca1f"]
 py = ["64f65755aee5b381cea27766a3a147c3f15b9b6b9ac88676de66ba2ae36793fa", "dc639b046a6e2cff5bbe40194ad65936d6ba360b52b3c3fe1d08a82dd50b5e53"]
-pydocstyle = ["2258f9b0df68b97bf3a6c29003edc5238ff8879f1efb6f1999988d934e432bd8", "5741c85e408f9e0ddf873611085e819b809fca90b619f5fd7f34bd4959da3dd4", "ed79d4ec5e92655eccc21eb0c6cf512e69512b4a97d215ace46d17e4990f2039"]
+pydocstyle = ["04c84e034ebb56eb6396c820442b8c4499ac5eb94a3bda88951ac3dc519b6058", "66aff87ffe34b1e49bff2dd03a88ce6843be2f3346b0c9814410d34987fbab59"]
 pygments = ["71e430bc85c88a430f000ac1d9b331d2407f681d6f6aec95e8bcfbc3df5b0127", "881c4c157e45f30af185c1ffe8d549d48ac9127433f2c380c24b84572ad66297"]
 pylint = ["5d77031694a5fb97ea95e828c8d10fc770a1df6eb3906067aaed42201a8a6a09", "723e3db49555abaf9bf79dc474c6b9e2935ad82230b10c1138a71ea41ac0fff1"]
-pyparsing = ["1873c03321fc118f4e9746baf201ff990ceb915f433f23b395f5580d1840cb2a", "9b6323ef4ab914af344ba97510e966d64ba91055d6b9afa6b30799340e89cc03"]
-pyrsistent = ["16692ee739d42cf5e39cef8d27649a8c1fdb7aa99887098f1460057c5eb75c3a"]
-pytest = ["2878de8ae1c79a62c012da6186b88ff0562ea96ce29c4208d2a9b11d9f607df1", "95b700cf21ed5b7e91bce7a6b5a573b2e3ef7b3643d00f681d8f9c4672f9fbdf"]
+pyparsing = ["6f98a7b9397e206d78cc01df10131398f1c8b8510a2f4d97d9abd82e1aacdd80", "d9338df12903bbf5d65a0e4e87c2161968b10d2e489652bb47001d82a9b028b4"]
+pyrsistent = ["34b47fa169d6006b32e99d4b3c4031f155e6e68ebcc107d6454852e8e0ee6533"]
+pytest = ["95b1f6db806e5b1b5b443efeb58984c24945508f93a866c1719e1a507a957d7c", "c3d5020755f70c82eceda3feaf556af9a341334414a8eca521a18f463bcead88"]
 pytest-cov = ["2b097cde81a302e1047331b48cadacf23577e431b61e9c6f49a1170bbe3d3da6", "e00ea4fdde970725482f1f35630d12f074e121a23801aabf2ae154ec6bdd343a"]
 pytest-describe = ["569bda96401fe512f4f345f33fd23fa4d718639d42afac62bc03254b5f2b3fdf"]
 pytest-expecter = ["1c8e9ab98ddd576436b61a7ba61ea11cfa5a3fc6b00288ce9e91e9dd770daf19", "27c93dfe87e2f4d28c525031be68d3f89457e3315241d97ee15f7689544e0e37"]
@@ -1242,30 +1247,30 @@ pytest-repeat = ["52bc413ab1a772e72c953a5592196ddd266fd2e76280eaac0c2a8378e9ac6d
 pytest-watch = ["06136f03d5b361718b8d0d234042f7b2f203910d8568f63df2f866b547b3d4b9"]
 python-dateutil = ["7e6584c74aeed623791615e26efd690f29817a27c73085b78e4bad02493df2fb", "c89805f6f4d64db21ed966fda138f8a5ed7a4fdbc1a8ee329ce1b74e3c74da9e"]
 pywinpty = ["0e01321e53a230233358a6d608a1a8bc86c3882cf82769ba3c62ca387dc9cc51", "333e0bc5fca8ad9e9a1516ebedb2a65da38dc1f399f8b2ea57d6cccec1ff2cc8", "3ca3123aa6340ab31bbf9bd012b92e72f9ec905e4c9ee152cc997403e1778cd3", "44a6dddcf2abf402e22f87e2c9a341f7d0b296afbec3d28184c8de4d7f514ee4", "53d94d574c3d4da2df5b1c3ae728b8d90e4d33502b0388576bbd4ddeb4de0f77", "c3955f162c53dde968f3fc11361658f1d83b683bfe601d4b6f94bb01ea4300bc", "cec9894ecb34de3d7b1ca121dd98433035b9f8949b5095e84b103b349231509c", "dcd45912e2fe2e6f72cee997a4da6ed1ad2056165a277ce5ec7f7ac98dcdf667", "f2bcdd9a2ffd8b223752a971b3d377fb7bfed85f140ec9710f1218d760f2ccb7"]
-pyyaml = ["57acc1d8533cbe51f6662a55434f0dbecfa2b9eaf115bede8f6fd00115a0c0d3", "588c94b3d16b76cfed8e0be54932e5729cc185caffaa5a451e7ad2f7ed8b4043", "68c8dd247f29f9a0d09375c9c6b8fdc64b60810ebf07ba4cdd64ceee3a58c7b7", "70d9818f1c9cd5c48bb87804f2efc8692f1023dac7f1a1a5c61d454043c1d265", "86a93cccd50f8c125286e637328ff4eef108400dd7089b46a7be3445eecfa391", "a0f329125a926876f647c9fa0ef32801587a12328b4a3c741270464e3e4fa778", "a3c252ab0fa1bb0d5a3f6449a4826732f3eb6c0270925548cac342bc9b22c225", "b4bb4d3f5e232425e25dda21c070ce05168a786ac9eda43768ab7f3ac2770955", "cd0618c5ba5bda5f4039b9398bb7fb6a317bb8298218c3de25c47c4740e4b95e", "ceacb9e5f8474dcf45b940578591c7f3d960e82f926c707788a570b51ba59190", "fe6a88094b64132c4bb3b631412e90032e8cfe9745a58370462240b8cb7553cd"]
-pyzmq = ["00dd015159eaeb1c0731ad49310e1f5d839c9a35a15e4f3267f5052233fad99b", "03913b6beb8e7b417b9910b0ee1fd5d62e9626d218faefbe879d70714ceab1a2", "13f17386df81d5e6efb9a4faea341d8de22cdc82e49a326dded26e33f42a3112", "16c6281d96885db1e15f7047ddc1a8f48ff4ea35d31ca709f4d2eb39f246d356", "17efab4a804e31f58361631256d660214204046f9e2b962738b171b9ad674ea7", "2b79919ddeff3d3c96aa6087c21d294c8db1c01f6bfeee73324944683685f419", "2f832e4711657bb8d16ea1feba860f676ec5f14fb9fe3b449b5953a60e89edae", "31a11d37ac73107363b47e14c94547dbfc6a550029c3fe0530be443199026fc2", "33a3e928e6c3138c675e1d6702dd11f6b7050177d7aab3fc322db6e1d2274490", "34a38195a6d3a9646cbcdaf8eb245b4d935c7a57f7e1b3af467814bc1a92467e", "42900054f1500acef6df7428edf806abbf641bf92eb9ceded24aa863397c3bae", "4ccc7f3c63aa9d744dadb62c49eda2d0e7de55649b80c45d7c684d70161a69af", "5b220c37c346e6575db8c88a940c1fc234f99ce8e0068c408919bb8896c4b6d2", "6074848da5c8b44a1ca40adf75cf65aa92bc80f635e8249aa8f37a69b2b9b6f5", "61a4155964bd4a14ef95bf46cb1651bcf8dcbbed8c0108e9c974c1fcbb57788f", "62b5774688326600c52f587f7a033ca6b6284bef4c8b1b5fda32480897759eac", "65a9ffa4f9f085d696f16fd7541f34b3c357d25fe99c90e3bce2ea59c3b5b4b6", "76a077d2c30f8adc5e919a55985a784b96aeca69b53c1ea6fd5723d3ae2e6f53", "8e5b4c51557071d6379d6dc1f54f35e9f6a137f5e84e102efb869c8d3c13c8ff", "917f73e07cc04f0678a96d93e7bb8b1adcccdde9ccfe202e622814f4d1d1ecfd", "91c75d3c4c357f9643e739db9e79ab9681b2f6ae8ec5678d6ef2ea0d01532596", "923dd91618b100bb4c92ab9ed7b65825a595b8524a094ce03c7cb2aaae7d353b", "9849054e0355e2bc7f4668766a25517ba76095031c9ff5e39ae8949cee5bb024", "c9d453933f0e3f44b9759189f2a18aa765f7f1a4345c727c18ebe8ad0d748d26", "cb7514936277abce64c2f4c56883e5704d85ed04d98d2d432d1c6764003bb003"]
-qtconsole = ["4af84facdd6f00a6b9b2927255f717bb23ae4b7a20ba1d9ef0a5a5a8dbe01ae2", "60d61d93f7d67ba2b265c6d599d413ffec21202fec999a952f658ff3a73d252b"]
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+qtconsole = ["40f53ab58ef77aa4b53aca1ee314eed873d05952dec22d2ab84d20660943b7de", "756bdcb6de6900dc50b14430accff2e47b846c3e7820e04075d4067b4c0ab52f"]
 requests = ["11e007a8a2aa0323f5a921e9e6a2d7e4e67d9877e85773fba9ba6419025cbeb4", "9cf5292fcd0f598c671cfc1e0d7d1a7f13bb8085e9a590f48c010551dc6c4b31"]
-"ruamel.yaml" = ["17dbf6b7362e7aee8494f7a0f5cffd44902a6331fe89ef0853b855a7930ab845", "23731c9efb79f3f5609dedffeb6c5c47a68125fd3d4b157d9fc71b1cd49076a9", "2bbdd598ae57bac20968cf9028cc67d37d83bdb7942a94b9478110bc72193148", "34586084cdd60845a3e1bece2b58f0a889be25450db8cc0ea143ddf0f40557a2", "35957fedbb287b01313bb5c556ffdc70c0277c3500213b5e73dfd8716f748d77", "414cb87a40974a575830b406ffab4ab8c6cbd82eeb73abd2a9d1397c1f0223e1", "428775be75db68d908b17e4e8dda424c410222f170dc173246aa63e972d094b3", "514f670f7d36519bda504d507edfe63e3c20489f86c86d42bc4d9a6dbdf82c7b", "5cb962c1ac6887c5da29138fbbe3b4b7705372eb54e599907fa63d4cd743246d", "5f6e30282cf70fb7754e1a5f101e27b5240009766376e131b31ab49f14fe81be", "86f8e010af6af0b4f42de2d0d9b19cb441e61d3416082186f9dd03c8552d13ad", "8d47ed1e557d546bd2dfe54f504d7274274602ff7a0652cde84c258ad6c2d96d", "98668876720bce1ac08562d8b93a564a80e3397e442c7ea19cebdcdf73da7f74", "9e1f0ddc18d8355dcf5586a5d90417df56074f237812b8682a93b62cca9d2043", "a7bc812a72a79d6b7dbb96fa5bee3950464b65ec055d3abc4db6572f2373a95c", "b72e13f9f206ee103247b07afd5a39c8b1aa98e8eba80ddba184d030337220ba", "bcff8ea9d916789e85e24beed8830c157fb8bc7c313e554733a8151540e66c01", "c76e78b3bab652069b8d6f7889b0e72f3455c2b854b2e0a8818393d149ad0a0d"]
+"ruamel.yaml" = ["08aaaa74ff66565024ecabf9ba2db212712382a21c0458f9a91c623a1fa83b34", "23f2efb872d2ebe3d5428b4f1a8f30cbf59f56e780c4981c155411ee65572673", "38718e69270141c403b5fc539f774ed394568f8a5195b507991f5b690356facb", "44da2be1153e173f90ad8775d4ac4237a3c06cfbb9660c1c1980271621833faa", "4b1674a936cdae9735578d4fd64bcbc6cfbb77a1a8f7037a50c6e3874ba4c9d8", "51d49c870aca850e652e2cd1c9bea9b52b77d13ad52b0556de496c1d264ea65f", "63dc8c6147a4cf77efadf2ae0f34e89e03de79289298bb941b7ae333d5d4020b", "6672798c6b52a976a7b24e20665055852388c83198d88029d3c76e2197ac221a", "6b6025f9b6a557e15e9fdfda4d9af0b57cd8d59ff98e23a0097ab2d7c0540f07", "7b750252e3d1ec5b53d03be508796c04a907060900c7d207280b7456650ebbfc", "847177699994f9c31adf78d1ef1ff8f069ef0241e744a3ee8b30fbdaa914cc1e", "8e42f3067a59e819935a2926e247170ed93c8f0b2ab64526f888e026854db2e4", "922d9e483c05d9000256640026f277fcc0c2e1e9271d05acada8e6cfb4c8b721", "92a8ca79f9173cca29ca9663b49d9c936aefc4c8a76f39318b0218c8f3626438", "ab8eeca4de4decf0d0a42cb6949d354da9fc70a2d9201f0dd55186c599b2e3a5", "bd4b60b649f4a81086f70cd56eff4722018ef36a28094c396f1a53bf450bd579", "fc6471ef15b69e454cca82433ac5f84929d9f3e2d72b9e54b06850b6b7133cc0", "ffc89770339191acbe5a15041950b5ad9daec7d659619b0ed9dad8c9c80c26f3"]
 send2trash = ["60001cc07d707fe247c94f74ca6ac0d3255aabcb930529690897ca2a39db28b2", "f1691922577b6fa12821234aeb57599d887c4900b9ca537948d2dac34aea888b"]
 six = ["3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c", "d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"]
 snowballstemmer = ["9f3b9ffe0809d174f7047e121431acf99c89a7040f0ca84f94ba53a498e6d0c9"]
-tenacity = ["a0c3c5f7ae0c33f5556c775ca059c12d6fd8ab7121613a713e8b7d649908571b", "b87c1934daa0b2ccc7db153c37b8bf91d12f165936ade8628e7b962b92dc7705"]
+tenacity = ["6a7511a59145c2e319b7d04ddd93c12d48cc3d3c8fa42c2846d33a620ee91f57", "a4eb168dbf55ed2cae27e7c6b2bd48ab54dabaf294177d998330cf59f294c112"]
 terminado = ["d9d012de63acb8223ac969c17c3043337c2fcfd28f3aea1ee429b345d01ef460", "de08e141f83c3a0798b050ecb097ab6259c3f0331b2f7b7750c9075ced2c20c2"]
 testpath = ["46c89ebb683f473ffe2aab0ed9f12581d4d078308a3cb3765d79c6b2317b0109", "b694b3d9288dbd81685c5d2e7140b81365d46c29f5db4bc659de5aa6b98780f8"]
 textwrap3 = ["5008eeebdb236f6303dcd68f18b856d355f6197511d952ba74bc75e40e0c3414", "bf5f4c40faf2a9ff00a9e0791fed5da7415481054cef45bb4a3cfb1f69044ae0"]
 toml = ["229f81c57791a41d65e399fc06bf0848bab550a9dfd5ed66df18ce5f05e73d5c", "235682dd292d5899d361a811df37e04a8828a5b1da3115886b73cf81ebc9100e", "f1db651f9657708513243e61e6cc67d101a39bad662eaa9b5546f789338e07a3"]
-tomlkit = ["d6506342615d051bc961f70bfcfa3d29b6616cc08a3ddfd4bc24196f16fd4ec2", "f077456d35303e7908cc233b340f71e0bec96f63429997f38ca9272b7d64029e"]
+tomlkit = ["a8d806f3a453c2d292afe97918398354e405b93919e2e68771a3fd0a90e89576", "c6b0c11b85e888c12330c7605d43c1446aa148cd421163f90ca46ea813f2c336"]
 tornado = ["349884248c36801afa19e342a77cc4458caca694b0eda633f5878e458a44cb2c", "398e0d35e086ba38a0427c3b37f4337327231942e731edaa6e9fd1865bbd6f60", "4e73ef678b1a859f0cb29e1d895526a20ea64b5ffd510a2307b5998c7df24281", "559bce3d31484b665259f50cd94c5c28b961b09315ccd838f284687245f416e5", "abbe53a39734ef4aba061fca54e30c6b4639d3e1f59653f0da37a0003de148c7", "c845db36ba616912074c5b1ee897f8e0124df269468f25e4fe21fe72f6edd7a9", "c9399267c926a4e7c418baa5cbe91c7d1cf362d505a1ef898fde44a07c9dd8a5"]
-tqdm = ["14a285392c32b6f8222ecfbcd217838f88e11630affe9006cd0e94c7eff3cb61", "25d4c0ea02a305a688e7e9c2cdc8f862f989ef2a4701ab28ee963295f5b109ab"]
+tqdm = ["1be3e4e3198f2d0e47b928e9d9a8ec1b63525db29095cec1467f4c5a4ea8ebf9", "7e39a30e3d34a7a6539378e39d7490326253b7ee354878a92255656dc4284457"]
 traitlets = ["9c4bd2d267b7153df9152698efb1050a5d84982d3384a37b2c1f7723ba3e7835", "c6cb5e6f57c5a9bdaa40fa71ce7b4af30298fbab9ece9815b5d995ab6217c7d9"]
 typed-ast = ["132eae51d6ef3ff4a8c47c393a4ef5ebf0d1aecc96880eb5d6c8ceab7017cc9b", "18141c1484ab8784006c839be8b985cfc82a2e9725837b0ecfa0203f71c4e39d", "2baf617f5bbbfe73fd8846463f5aeafc912b5ee247f410700245d68525ec584a", "3d90063f2cbbe39177e9b4d888e45777012652d6110156845b828908c51ae462", "4304b2218b842d610aa1a1d87e1dc9559597969acc62ce717ee4dfeaa44d7eee", "4983ede548ffc3541bae49a82675996497348e55bafd1554dc4e4a5d6eda541a", "5315f4509c1476718a4825f45a203b82d7fdf2a6f5f0c8f166435975b1c9f7d4", "6cdfb1b49d5345f7c2b90d638822d16ba62dc82f7616e9b4caa10b72f3f16649", "7b325f12635598c604690efd7a0197d0b94b7d7778498e76e0710cd582fd1c7a", "8d3b0e3b8626615826f9a626548057c5275a9733512b137984a68ba1598d3d2f", "8f8631160c79f53081bd23446525db0bc4c5616f78d04021e6e434b286493fd7", "912de10965f3dc89da23936f1cc4ed60764f712e5fa603a09dd904f88c996760", "b010c07b975fe853c65d7bbe9d4ac62f1c69086750a574f6292597763781ba18", "c908c10505904c48081a5415a1e295d8403e353e0c14c42b6d67f8f97fae6616", "c94dd3807c0c0610f7c76f078119f4ea48235a953512752b9175f9f98f5ae2bd", "ce65dee7594a84c466e79d7fb7d3303e7295d16a83c22c7c4037071b059e2c21", "eaa9cfcb221a8a4c2889be6f93da141ac777eb8819f077e1d09fb12d00a09a93", "f3376bc31bad66d46d44b4e6522c5c21976bf9bca4ef5987bb2bf727f4506cbb", "f9202fa138544e13a4ec1a6792c35834250a85958fde1251b6a22e07d1260ae7"]
-typing = ["38566c558a0a94d6531012c8e917b1b8518a41e418f7f15f00e129cc80162ad3", "53765ec4f83a2b720214727e319607879fec4acde22c4fbb54fa2604e79e44ce", "84698954b4e6719e912ef9a42a2431407fe3755590831699debda6fba92aac55"]
+typing = ["91dfe6f3f706ee8cc32d38edbbf304e9b7583fb37108fef38229617f8b3eba23", "c8cabb5ab8945cd2f54917be357d134db9cc1eb039e59d1606dc1e60cb1d9d36", "f38d83c5a7a7086543a0f649564d661859c5146a85775ab90c0d2f93ffaa9714"]
 typing-extensions = ["2ed632b30bb54fc3941c382decfd0ee4148f5c591651c9272473fea2c6397d95", "b1edbbf0652660e32ae780ac9433f4231e7339c7f9a8057d0f042fcbcea49b87", "d8179012ec2c620d3791ca6fe2bf7979d979acdbef1fca0bc56b37411db682ed"]
 urllib3 = ["b246607a25ac80bedac05c6f282e3cdaf3afb65420fd024ac94435cabe6e18d1", "dbe59173209418ae49d485b87d1681aefa36252ee85884c31346debd19463232"]
 watchdog = ["965f658d0732de3188211932aeb0bb457587f04f63ab4c1e33eab878e9de961d"]
 wcwidth = ["3df37372226d6e63e1b1e1eda15c594bca98a22d33a23832a90998faa96bc65e", "f4ebe71925af7b40a864553f761ed559b43544f8f71746c2d756c7fe788ade7c"]
 webencodings = ["a0af1213f3c2226497a97e2b3aa01a7e4bee4f403f95be16fc9acd2947514a78", "b36a1c245f2d304965eb4e0a82848379241dc04b865afcc4aab16748587e1923"]
-widgetsnbextension = ["14b2c65f9940c9a7d3b70adbe713dbd38b5ec69724eebaba034d1036cf3d4740", "fa618be8435447a017fd1bf2c7ae922d0428056cfc7449f7a8641edf76b48265"]
+widgetsnbextension = ["079f87d87270bce047512400efd70238820751a11d2d8cb137a5a5bdbaf255c7", "bd314f8ceb488571a5ffea6cc5b9fc6cba0adaf88a9d2386b93a489751938bcd"]
 wrapt = ["565a021fd19419476b9362b05eeaa094178de64f8361e44468f9e9d7843901e1"]
-zipp = ["8c1019c6aad13642199fbe458275ad6a84907634cc9f0989877ccc4a2840139d", "ca943a7e809cc12257001ccfb99e3563da9af99d52f261725e96dfe0f9275bc3"]
+zipp = ["3718b1cbcd963c7d4c5511a8240812904164b7f381b647143a89d3b98f9bcd8e", "f06903e9f1f43b12d371004b4ac7b06ab39a44adc747266928ae6debfa7b3335"]
diff --git a/pyproject.toml b/pyproject.toml
index 23a43826..fd6e157c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [tool.poetry]
 
 name = "datafiles"
-version = "0.4"
+version = "0.4.1"
 description = "File-based ORM for dataclasses."
 
 license = "MIT"