Implement the "audio editing" bounded-context of the domain.

poetry.lock

+[[package]]
+category = "dev"
+description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
+name = "appdirs"
+optional = false
+python-versions = "*"
+version = "1.4.4"
+
 [[package]]
 category = "dev"
 description = "Command Arguments for Humans."
@@ -6,6 +14,52 @@ optional = false
 python-versions = "*"
 version = "0.1.0"
 
+[[package]]
+category = "dev"
+description = "The uncompromising code formatter."
+name = "black"
+optional = false
+python-versions = ">=3.6"
+version = "20.8b1"
+
+[package.dependencies]
+appdirs = "*"
+click = ">=7.1.2"
+mypy-extensions = ">=0.4.3"
+pathspec = ">=0.6,<1"
+regex = ">=2020.1.8"
+toml = ">=0.10.1"
+typed-ast = ">=1.4.0"
+typing-extensions = ">=3.7.4"
+
+[package.extras]
+colorama = ["colorama (>=0.4.3)"]
+d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
+
+[[package]]
+category = "dev"
+description = "Python package for providing Mozilla's CA Bundle."
+name = "certifi"
+optional = false
+python-versions = "*"
+version = "2020.6.20"
+
+[[package]]
+category = "dev"
+description = "Universal encoding detector for Python 2 and 3"
+name = "chardet"
+optional = false
+python-versions = "*"
+version = "3.0.4"
+
+[[package]]
+category = "dev"
+description = "Composable command line interface toolkit"
+name = "click"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "7.1.2"
+
 [[package]]
 category = "dev"
 description = "Python Command Line Interface Tools"
@@ -28,6 +82,38 @@ version = "5.3"
 [package.extras]
 toml = ["toml"]
 
+[[package]]
+category = "dev"
+description = "A parser for Python dependency files"
+name = "dparse"
+optional = false
+python-versions = ">=3.5"
+version = "0.5.1"
+
+[package.dependencies]
+packaging = "*"
+pyyaml = "*"
+toml = "*"
+
+[package.extras]
+pipenv = ["pipenv"]
+
+[[package]]
+category = "dev"
+description = "Internationalized Domain Names in Applications (IDNA)"
+name = "idna"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "2.10"
+
+[[package]]
+category = "dev"
+description = "Pythonic task execution"
+name = "invoke"
+optional = false
+python-versions = "*"
+version = "1.4.1"
+
 [[package]]
 category = "dev"
 description = "The definitive testing tool for Python. Born under the banner of Behavior Driven Development."
@@ -77,6 +163,26 @@ optional = false
 python-versions = "*"
 version = "0.4.3"
 
+[[package]]
+category = "dev"
+description = "Core utilities for Python packages"
+name = "packaging"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "20.4"
+
+[package.dependencies]
+pyparsing = ">=2.0.2"
+six = "*"
+
+[[package]]
+category = "dev"
+description = "Utility library for gitignore style pattern matching of file paths."
+name = "pathspec"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "0.8.0"
+
 [[package]]
 category = "main"
 description = "Manipulate audio with an simple and easy high level interface"
@@ -85,6 +191,48 @@ optional = false
 python-versions = "*"
 version = "0.24.1"
 
+[[package]]
+category = "dev"
+description = "Python parsing module"
+name = "pyparsing"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+version = "2.4.7"
+
+[[package]]
+category = "dev"
+description = "YAML parser and emitter for Python"
+name = "pyyaml"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "5.3.1"
+
+[[package]]
+category = "dev"
+description = "Alternative regular expression module, to replace re."
+name = "regex"
+optional = false
+python-versions = "*"
+version = "2020.10.28"
+
+[[package]]
+category = "dev"
+description = "Python HTTP for Humans."
+name = "requests"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "2.24.0"
+
+[package.dependencies]
+certifi = ">=2017.4.17"
+chardet = ">=3.0.2,<4"
+idna = ">=2.5,<3"
+urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
+
+[package.extras]
+security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
+socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
+
 [[package]]
 category = "dev"
 description = "BDD / TDD assertion library for Python"
@@ -97,6 +245,29 @@ version = "1.1.5"
 mock = "*"
 termcolor = "*"
 
+[[package]]
+category = "dev"
+description = "Checks installed dependencies for known vulnerabilities."
+name = "safety"
+optional = false
+python-versions = ">=3.5"
+version = "1.9.0"
+
+[package.dependencies]
+Click = ">=6.0"
+dparse = ">=0.5.1"
+packaging = "*"
+requests = "*"
+setuptools = "*"
+
+[[package]]
+category = "dev"
+description = "Python 2 and 3 compatibility utilities"
+name = "six"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+version = "1.15.0"
+
 [[package]]
 category = "dev"
 description = "ANSII Color formatting for output in terminal."
@@ -105,6 +276,14 @@ optional = false
 python-versions = "*"
 version = "1.1.0"
 
+[[package]]
+category = "dev"
+description = "Python Library for Tom's Obvious, Minimal Language"
+name = "toml"
+optional = false
+python-versions = "*"
+version = "0.10.1"
+
 [[package]]
 category = "dev"
 description = "a fork of Python 2 and 3 ast modules with type comment support"
@@ -121,15 +300,48 @@ optional = false
 python-versions = "*"
 version = "3.7.4.3"
 
+[[package]]
+category = "dev"
+description = "HTTP library with thread-safe connection pooling, file post, and more."
+name = "urllib3"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
+version = "1.25.11"
+
+[package.extras]
+brotli = ["brotlipy (>=0.6.0)"]
+secure = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "certifi", "ipaddress"]
+socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7,<2.0)"]
+
 [metadata]
-content-hash = "04ee3cf045fca22a796e4e95a5362b273a12eb222a7dfa09de7e63b132c36934"
+content-hash = "448e5d4c2054a2f904e6e6bf40702e090d163a3008202070f9e25e5027aacd16"
 lock-version = "1.0"
 python-versions = "^3.8"
 
 [metadata.files]
+appdirs = [
+    {file = "appdirs-1.4.4-py2.py3-none-any.whl", hash = "sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128"},
+    {file = "appdirs-1.4.4.tar.gz", hash = "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41"},
+]
 args = [
     {file = "args-0.1.0.tar.gz", hash = "sha256:a785b8d837625e9b61c39108532d95b85274acd679693b71ebb5156848fcf814"},
 ]
+black = [
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+    {file = "black-20.8b1.tar.gz", hash = "sha256:1c02557aa099101b9d21496f8a914e9ed2222ef70336404eeeac8edba836fbea"},
+]
+certifi = [
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+    {file = "certifi-2020.6.20.tar.gz", hash = "sha256:5930595817496dd21bb8dc35dad090f1c2cd0adfaf21204bf6732ca5d8ee34d3"},
+]
+chardet = [
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+    {file = "chardet-3.0.4.tar.gz", hash = "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae"},
+]
+click = [
+    {file = "click-7.1.2-py2.py3-none-any.whl", hash = "sha256:dacca89f4bfadd5de3d7489b7c8a566eee0d3676333fbb50030263894c38c0dc"},
+    {file = "click-7.1.2.tar.gz", hash = "sha256:d2b5255c7c6349bc1bd1e59e08cd12acbbd63ce649f2588755783aa94dfb6b1a"},
+]
 clint = [
     {file = "clint-0.5.1.tar.gz", hash = "sha256:05224c32b1075563d0b16d0015faaf9da43aa214e4a2140e51f08789e7a4c5aa"},
 ]
@@ -169,6 +381,19 @@ coverage = [
     {file = "coverage-5.3-cp39-cp39-win_amd64.whl", hash = "sha256:47a11bdbd8ada9b7ee628596f9d97fbd3851bd9999d398e9436bd67376dbece7"},
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 ]
+dparse = [
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+    {file = "dparse-0.5.1.tar.gz", hash = "sha256:a1b5f169102e1c894f9a7d5ccf6f9402a836a5d24be80a986c7ce9eaed78f367"},
+]
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+    {file = "idna-2.10.tar.gz", hash = "sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6"},
+]
+invoke = [
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+    {file = "invoke-1.4.1-py3-none-any.whl", hash = "sha256:87b3ef9d72a1667e104f89b159eaf8a514dbf2f3576885b2bbdefe74c3fb2132"},
+    {file = "invoke-1.4.1.tar.gz", hash = "sha256:de3f23bfe669e3db1085789fd859eb8ca8e0c5d9c20811e2407fa042e8a5e15d"},
+]
 mamba = [
     {file = "mamba-0.11.1.tar.gz", hash = "sha256:f976735949bc9a8731cc0876aaea2720949bd3d1554b0e94004c91a4f61abecb"},
 ]
@@ -196,17 +421,87 @@ mypy-extensions = [
     {file = "mypy_extensions-0.4.3-py2.py3-none-any.whl", hash = "sha256:090fedd75945a69ae91ce1303b5824f428daf5a028d2f6ab8a299250a846f15d"},
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 ]
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+    {file = "packaging-20.4.tar.gz", hash = "sha256:4357f74f47b9c12db93624a82154e9b120fa8293699949152b22065d556079f8"},
+]
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 pydub = [
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 ]
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+requests = [
+    {file = "requests-2.24.0-py2.py3-none-any.whl", hash = "sha256:fe75cc94a9443b9246fc7049224f75604b113c36acb93f87b80ed42c44cbb898"},
+    {file = "requests-2.24.0.tar.gz", hash = "sha256:b3559a131db72c33ee969480840fff4bb6dd111de7dd27c8ee1f820f4f00231b"},
+]
 robber = [
     {file = "robber-1.1.5-py3-none-any.whl", hash = "sha256:376d354a7e11d15d4f83ada645e6e85499d98c96b2a0a7e05816a5a8cda20670"},
     {file = "robber-1.1.5.tar.gz", hash = "sha256:055bc12170bae7266a8d11e34f8befa4da100b5b8656a6211a383db19f66e576"},
 ]
+safety = [
+    {file = "safety-1.9.0-py2.py3-none-any.whl", hash = "sha256:86c1c4a031fe35bd624fce143fbe642a0234d29f7cbf7a9aa269f244a955b087"},
+    {file = "safety-1.9.0.tar.gz", hash = "sha256:23bf20690d4400edc795836b0c983c2b4cbbb922233108ff925b7dd7750f00c9"},
+]
+six = [
+    {file = "six-1.15.0-py2.py3-none-any.whl", hash = "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"},
+    {file = "six-1.15.0.tar.gz", hash = "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259"},
+]
 termcolor = [
     {file = "termcolor-1.1.0.tar.gz", hash = "sha256:1d6d69ce66211143803fbc56652b41d73b4a400a2891d7bf7a1cdf4c02de613b"},
 ]
+toml = [
+    {file = "toml-0.10.1-py2.py3-none-any.whl", hash = "sha256:bda89d5935c2eac546d648028b9901107a595863cb36bae0c73ac804a9b4ce88"},
+    {file = "toml-0.10.1.tar.gz", hash = "sha256:926b612be1e5ce0634a2ca03470f95169cf16f939018233a670519cb4ac58b0f"},
+]
 typed-ast = [
     {file = "typed_ast-1.4.1-cp35-cp35m-manylinux1_i686.whl", hash = "sha256:73d785a950fc82dd2a25897d525d003f6378d1cb23ab305578394694202a58c3"},
     {file = "typed_ast-1.4.1-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:aaee9905aee35ba5905cfb3c62f3e83b3bec7b39413f0a7f19be4e547ea01ebb"},
@@ -235,3 +530,7 @@ typing-extensions = [
     {file = "typing_extensions-3.7.4.3-py3-none-any.whl", hash = "sha256:7cb407020f00f7bfc3cb3e7881628838e69d8f3fcab2f64742a5e76b2f841918"},
     {file = "typing_extensions-3.7.4.3.tar.gz", hash = "sha256:99d4073b617d30288f569d3f13d2bd7548c3a7e4c8de87db09a9d29bb3a4a60c"},
 ]
+urllib3 = [
+    {file = "urllib3-1.25.11-py2.py3-none-any.whl", hash = "sha256:f5321fbe4bf3fefa0efd0bfe7fb14e90909eb62a48ccda331726b4319897dd5e"},
+    {file = "urllib3-1.25.11.tar.gz", hash = "sha256:8d7eaa5a82a1cac232164990f04874c594c9453ec55eef02eab885aa02fc17a2"},
+]

pyproject.toml

@@ -13,6 +13,9 @@ pydub = "^0.24.1"
 mypy = "^0.790"
 mamba = "^0.11.1"
 robber = "^1.1.5"
+invoke = "^1.4.1"
+black = "^20.8b1"
+safety = "^1.9.0"
 
 [build-system]
 requires = ["poetry>=0.12"]

splito/domain/audio_editing/model.py

+from abc import ABC
+from dataclasses import dataclass
+
+
+@dataclass(frozen=True)
+class Interval:
+    start: int = 0
+    end: int = 0
+
+
+class Track(ABC):
+    def extract(self, an_interval: Interval) -> "Track":
+        raise NotImplementedError()
+
+
+class Tracks(ABC):
+    def __getitem__(self, a_path: str) -> Track:
+        raise NotImplementedError()
+
+    def __setitem__(self, a_path: str, a_track: Track) -> None:
+        raise NotImplementedError()

splito/domain/audio_editing/model_spec.py

+from mamba import describe, it, _it  # type: ignore
+from robber import expect  # type: ignore
+
+from splito.domain.audio_editing.model import Interval
+
+
+with describe(Interval):
+
+    with it("builds"):
+
+        def action() -> None:
+            _ = Interval(0, 1)
+
+        expect(action).not_to.throw(Exception)
+
+    with _it("does not build if start is after end"):
+
+        def action() -> None:
+            _ = Interval(1, 0)
+
+        expect(action).to.throw(Exception)
+
+    with _it("does not build if start is equal to end"):
+
+        def action() -> None:
+            _ = Interval(1, 1)
+
+        expect(action).to.throw(Exception)