Simplify handler registration

.flake8

@@ -0,0 +1,2 @@
+[flake8]
+max-line-length = 100

.gitignore

@@ -1 +1,2 @@
 __pycache__/
+.mypy_cache/

.pre-commit-config.yaml

@@ -0,0 +1,18 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.2.0
+    hooks:
+    -   id: trailing-whitespace
+    -   id: end-of-file-fixer
+    -   id: check-yaml
+    -   id: check-added-large-files
+-   repo: https://github.com/pycqa/flake8
+    rev: '3.9.2'
+    hooks:
+    -   id: flake8
+-   repo: https://github.com/pre-commit/mirrors-mypy
+    rev: 'v0.902'
+    hooks:
+    -   id: mypy

mypy.ini

@@ -0,0 +1,3 @@
+[mypy]
+python_version = 3.9
+disallow_untyped_defs = True

paircd/command_handler.py

@@ -0,0 +1,18 @@
+from dataclasses import dataclass
+from typing import Awaitable, Callable
+
+from paircd.client import Client
+from paircd.message import Message
+from paircd.server import Server
+
+HandlerFunc = Callable[
+    [Server, Client, Message],
+    Awaitable[None],
+]
+
+
+@dataclass
+class CommandHandler:
+    cmd: str
+    argc: int
+    handler: HandlerFunc

paircd/handle.py

@@ -1,22 +0,0 @@
-import logging
-from typing import Any, Dict
-
-from paircd.client import Client
-from paircd.log import log_client
-from paircd.message import Message
-from paircd.server import Server
-
-CMD_HANDLERS: Dict[str, Any] = {}
-CMD_EXPECTED_ARGC: Dict[str, int] = {}
-
-
-def register_cmd_handler(cmd: str, argc: int, handler) -> None:
-    CMD_EXPECTED_ARGC[cmd] = argc
-    CMD_HANDLERS[cmd] = handler
-
-
-async def handle_cmd(server: Server, client: Client, msg: Message) -> None:
-    if msg.cmd not in CMD_HANDLERS:
-        log_client(client, f"used unknown command {msg.cmd}", level=logging.WARN)
-        return
-    await CMD_HANDLERS[msg.cmd](server, client, msg)

paircd/handler/join.py

@@ -1,8 +1,7 @@
-from asyncio import create_task
 import logging
 
-from paircd.channel import Channel
 from paircd.client import Client
+from paircd.command_handler import CommandHandler
 from paircd.log import log_client
 from paircd.message import Message
 from paircd.server import Server
@@ -27,3 +26,6 @@ async def handle_join(server: Server, client: Client, msg: Message) -> None:
     await channel.msg_queue.put(
         Message(cmd="JOIN", args=[channel_name], prefix=client.id()).encode()
     )
+
+
+JOIN = CommandHandler("JOIN", 1, handle_join)

paircd/handler/nick.py

@@ -1,4 +1,5 @@
 from paircd.client import Client
+from paircd.command_handler import CommandHandler
 from paircd.log import log_client
 from paircd.message import Message
 from paircd.server import Server
@@ -17,3 +18,6 @@ async def handle_nick(server: Server, client: Client, msg: Message) -> None:
     if client.username and client.realname:
         client.registered = True
         log_client(client, "registered")
+
+
+NICK = CommandHandler("NICK", 1, handle_nick)

paircd/handler/privmsg.py

@@ -1,7 +1,8 @@
 import logging
 
-from paircd.log import log_client
 from paircd.client import Client
+from paircd.command_handler import CommandHandler
+from paircd.log import log_client
 from paircd.message import Message
 from paircd.server import Server
 
@@ -10,16 +11,19 @@ async def handle_privmsg(server: Server, client: Client, msg: Message) -> None:
     recipient = msg.args[0]
     raw_msg = msg.args[1]
 
-    msg = Message("PRIVMSG", [recipient, f":{raw_msg}"], prefix=client.id()).encode()
+    out = Message("PRIVMSG", [recipient, f":{raw_msg}"], prefix=client.id()).encode()
 
     for name, other_client in server.clients_by_nick.items():
         if name == recipient:
-            other_client.msg_queue.put_nowait(msg)
+            other_client.msg_queue.put_nowait(out)
             return
 
     for name, channel in server.channels_by_name.items():
         if name == recipient:
-            channel.msg_queue.put_nowait(msg)
+            channel.msg_queue.put_nowait(out)
             return
 
     log_client(client, "unknown recipient", level=logging.WARN)
+
+
+PRIVMSG = CommandHandler("PRIVMSG", 2, handle_privmsg)

paircd/handler/user.py

@@ -1,6 +1,7 @@
 import logging
 
 from paircd.client import Client
+from paircd.command_handler import CommandHandler
 from paircd.log import log_client
 from paircd.message import Message
 from paircd.server import Server
@@ -17,3 +18,6 @@ async def handle_user(server: Server, client: Client, msg: Message) -> None:
     if client.nickname:
         client.registered = True
         log_client(client, "registered")
+
+
+USER = CommandHandler("USER", 4, handle_user)

paircd/handlers.py

@@ -0,0 +1,34 @@
+from logging import WARN
+from typing import Dict
+
+from paircd.client import Client
+from paircd.command_handler import CommandHandler
+from paircd.log import log_client
+from paircd.message import Message
+from paircd.server import Server
+
+from paircd.handler.join import JOIN
+from paircd.handler.nick import NICK
+from paircd.handler.privmsg import PRIVMSG
+from paircd.handler.user import USER
+
+ALL_HANDLERS = [
+    JOIN,
+    NICK,
+    PRIVMSG,
+    USER,
+]
+
+CMD_HANDLERS: Dict[str, CommandHandler] = {}
+
+
+def register_cmd_handlers() -> None:
+    for handler in ALL_HANDLERS:
+        CMD_HANDLERS[handler.cmd] = handler
+
+
+async def handle_cmd(server: Server, client: Client, msg: Message) -> None:
+    if msg.cmd not in CMD_HANDLERS:
+        log_client(client, f"used unknown command {msg.cmd}", level=WARN)
+        return
+    await CMD_HANDLERS[msg.cmd].handler(server, client, msg)

paircd/main.py

@@ -1,13 +1,10 @@
 import asyncio
+from asyncio.streams import StreamReader, StreamWriter
 import logging
 import os
 
 from paircd.client import Client
-from paircd.handle import handle_cmd, register_cmd_handler
-from paircd.handler.join import handle_join
-from paircd.handler.nick import handle_nick
-from paircd.handler.privmsg import handle_privmsg
-from paircd.handler.user import handle_user
+from paircd.handlers import handle_cmd, register_cmd_handlers
 from paircd.message import parse_message
 from paircd.server import Server
 
@@ -25,18 +22,14 @@ async def read_forever(server: Server, client: Client) -> None:
         await handle_cmd(server, client, msg)
 
 
-async def main():
+async def main() -> None:
     bind_addr = os.getenv("BIND_ADDR") or "0.0.0.0"
     port = os.getenv("PORT") or 6667
 
-    register_cmd_handler("JOIN", 1, handle_join)
-    register_cmd_handler("NICK", 1, handle_nick)
-    register_cmd_handler("PRIVMSG", 2, handle_privmsg)
-    register_cmd_handler("USER", 4, handle_user)
-
     irc_server = Server()
+    register_cmd_handlers()
 
-    async def register_client(reader, writer):
+    async def register_client(reader: StreamReader, writer: StreamWriter) -> None:
         client = Client(
             hostname=writer.get_extra_info("peername")[0],
             reader=reader,

paircd/message.py

@@ -12,7 +12,7 @@ EXPECTED_ARG_COUNT = {
 
 
 class ParsingError(Exception):
-    message: str
+    message: Optional[str]
 
     def __init__(self, message: Optional[str] = None) -> None:
         self.message = message

poetry.lock

@@ -1,3 +1,11 @@
+[[package]]
+name = "appdirs"
+version = "1.4.4"
+description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
+category = "dev"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "atomicwrites"
 version = "1.4.0"
@@ -20,6 +28,14 @@ docs = ["furo", "sphinx", "zope.interface", "sphinx-notfound-page"]
 tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface"]
 tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins"]
 
+[[package]]
+name = "cfgv"
+version = "3.3.0"
+description = "Validate configuration and produce human readable error messages."
+category = "dev"
+optional = false
+python-versions = ">=3.6.1"
+
 [[package]]
 name = "colorama"
 version = "0.4.4"
@@ -28,6 +44,33 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[[package]]
+name = "distlib"
+version = "0.3.2"
+description = "Distribution utilities"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "filelock"
+version = "3.0.12"
+description = "A platform independent file lock."
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "identify"
+version = "2.2.10"
+description = "File identification library for Python"
+category = "dev"
+optional = false
+python-versions = ">=3.6.1"
+
+[package.extras]
+license = ["editdistance-s"]
+
 [[package]]
 name = "more-itertools"
 version = "8.8.0"
@@ -36,6 +79,39 @@ category = "dev"
 optional = false
 python-versions = ">=3.5"
 
+[[package]]
+name = "mypy"
+version = "0.902"
+description = "Optional static typing for Python"
+category = "dev"
+optional = false
+python-versions = ">=3.5"
+
+[package.dependencies]
+mypy-extensions = ">=0.4.3,<0.5.0"
+toml = "*"
+typing-extensions = ">=3.7.4"
+
+[package.extras]
+dmypy = ["psutil (>=4.0)"]
+python2 = ["typed-ast (>=1.4.0,<1.5.0)"]
+
+[[package]]
+name = "mypy-extensions"
+version = "0.4.3"
+description = "Experimental type system extensions for programs checked with the mypy typechecker."
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "nodeenv"
+version = "1.6.0"
+description = "Node.js virtual environment builder"
+category = "dev"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "packaging"
 version = "20.9"
@@ -58,6 +134,22 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 [package.extras]
 dev = ["pre-commit", "tox"]
 
+[[package]]
+name = "pre-commit"
+version = "2.13.0"
+description = "A framework for managing and maintaining multi-language pre-commit hooks."
+category = "dev"
+optional = false
+python-versions = ">=3.6.1"
+
+[package.dependencies]
+cfgv = ">=2.0.0"
+identify = ">=1.0.0"
+nodeenv = ">=0.11.1"
+pyyaml = ">=5.1"
+toml = "*"
+virtualenv = ">=20.0.8"
+
 [[package]]
 name = "py"
 version = "1.10.0"
@@ -96,6 +188,56 @@ wcwidth = "*"
 checkqa-mypy = ["mypy (==v0.761)"]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
+[[package]]
+name = "pyyaml"
+version = "5.4.1"
+description = "YAML parser and emitter for Python"
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*"
+
+[[package]]
+name = "six"
+version = "1.16.0"
+description = "Python 2 and 3 compatibility utilities"
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
+name = "toml"
+version = "0.10.2"
+description = "Python Library for Tom's Obvious, Minimal Language"
+category = "dev"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
+name = "typing-extensions"
+version = "3.10.0.0"
+description = "Backported and Experimental Type Hints for Python 3.5+"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "virtualenv"
+version = "20.4.7"
+description = "Virtual Python Environment builder"
+category = "dev"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
+
+[package.dependencies]
+appdirs = ">=1.4.3,<2"
+distlib = ">=0.3.1,<1"
+filelock = ">=3.0.0,<4"
+six = ">=1.9.0,<2"
+
+[package.extras]
+docs = ["proselint (>=0.10.2)", "sphinx (>=3)", "sphinx-argparse (>=0.2.5)", "sphinx-rtd-theme (>=0.4.3)", "towncrier (>=19.9.0rc1)"]
+testing = ["coverage (>=4)", "coverage-enable-subprocess (>=1)", "flaky (>=3)", "pytest (>=4)", "pytest-env (>=0.6.2)", "pytest-freezegun (>=0.4.1)", "pytest-mock (>=2)", "pytest-randomly (>=1)", "pytest-timeout (>=1)", "packaging (>=20.0)", "xonsh (>=0.9.16)"]
+
 [[package]]
 name = "wcwidth"
 version = "0.2.5"
@@ -107,9 +249,13 @@ python-versions = "*"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.9"
-content-hash = "4d1de49710d78bd295469a572576efe3d5b96e6e8760458e870affe880e8d10e"
+content-hash = "6a46752f4a24a2bba8adf3fc49cfab506ac08b4c2e0b7a844be1b36315301ccc"
 
 [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"},
+]
 atomicwrites = [
     {file = "atomicwrites-1.4.0-py2.py3-none-any.whl", hash = "sha256:6d1784dea7c0c8d4a5172b6c620f40b6e4cbfdf96d783691f2e1302a7b88e197"},
     {file = "atomicwrites-1.4.0.tar.gz", hash = "sha256:ae70396ad1a434f9c7046fd2dd196fc04b12f9e91ffb859164193be8b6168a7a"},
@@ -118,14 +264,63 @@ attrs = [
     {file = "attrs-21.2.0-py2.py3-none-any.whl", hash = "sha256:149e90d6d8ac20db7a955ad60cf0e6881a3f20d37096140088356da6c716b0b1"},
     {file = "attrs-21.2.0.tar.gz", hash = "sha256:ef6aaac3ca6cd92904cdd0d83f629a15f18053ec84e6432106f7a4d04ae4f5fb"},
 ]
+cfgv = [
+    {file = "cfgv-3.3.0-py2.py3-none-any.whl", hash = "sha256:b449c9c6118fe8cca7fa5e00b9ec60ba08145d281d52164230a69211c5d597a1"},
+    {file = "cfgv-3.3.0.tar.gz", hash = "sha256:9e600479b3b99e8af981ecdfc80a0296104ee610cab48a5ae4ffd0b668650eb1"},
+]
 colorama = [
     {file = "colorama-0.4.4-py2.py3-none-any.whl", hash = "sha256:9f47eda37229f68eee03b24b9748937c7dc3868f906e8ba69fbcbdd3bc5dc3e2"},
     {file = "colorama-0.4.4.tar.gz", hash = "sha256:5941b2b48a20143d2267e95b1c2a7603ce057ee39fd88e7329b0c292aa16869b"},
 ]
+distlib = [
+    {file = "distlib-0.3.2-py2.py3-none-any.whl", hash = "sha256:23e223426b28491b1ced97dc3bbe183027419dfc7982b4fa2f05d5f3ff10711c"},
+    {file = "distlib-0.3.2.zip", hash = "sha256:106fef6dc37dd8c0e2c0a60d3fca3e77460a48907f335fa28420463a6f799736"},
+]
+filelock = [
+    {file = "filelock-3.0.12-py3-none-any.whl", hash = "sha256:929b7d63ec5b7d6b71b0fa5ac14e030b3f70b75747cef1b10da9b879fef15836"},
+    {file = "filelock-3.0.12.tar.gz", hash = "sha256:18d82244ee114f543149c66a6e0c14e9c4f8a1044b5cdaadd0f82159d6a6ff59"},
+]
+identify = [
+    {file = "identify-2.2.10-py2.py3-none-any.whl", hash = "sha256:18d0c531ee3dbc112fa6181f34faa179de3f57ea57ae2899754f16a7e0ff6421"},
+    {file = "identify-2.2.10.tar.gz", hash = "sha256:5b41f71471bc738e7b586308c3fca172f78940195cb3bf6734c1e66fdac49306"},
+]
 more-itertools = [
     {file = "more-itertools-8.8.0.tar.gz", hash = "sha256:83f0308e05477c68f56ea3a888172c78ed5d5b3c282addb67508e7ba6c8f813a"},
     {file = "more_itertools-8.8.0-py3-none-any.whl", hash = "sha256:2cf89ec599962f2ddc4d568a05defc40e0a587fbc10d5989713638864c36be4d"},
 ]
+mypy = [
+    {file = "mypy-0.902-cp35-cp35m-macosx_10_9_x86_64.whl", hash = "sha256:3f12705eabdd274b98f676e3e5a89f247ea86dc1af48a2d5a2b080abac4e1243"},
+    {file = "mypy-0.902-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:2f9fedc1f186697fda191e634ac1d02f03d4c260212ccb018fabbb6d4b03eee8"},
+    {file = "mypy-0.902-cp35-cp35m-manylinux2010_x86_64.whl", hash = "sha256:0756529da2dd4d53d26096b7969ce0a47997123261a5432b48cc6848a2cb0bd4"},
+    {file = "mypy-0.902-cp35-cp35m-win_amd64.whl", hash = "sha256:68a098c104ae2b75e946b107ef69dd8398d54cb52ad57580dfb9fc78f7f997f0"},
+    {file = "mypy-0.902-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:cd01c599cf9f897b6b6c6b5d8b182557fb7d99326bcdf5d449a0fbbb4ccee4b9"},
+    {file = "mypy-0.902-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:e89880168c67cf4fde4506b80ee42f1537ad66ad366c101d388b3fd7d7ce2afd"},
+    {file = "mypy-0.902-cp36-cp36m-manylinux2010_x86_64.whl", hash = "sha256:ebe2bc9cb638475f5d39068d2dbe8ae1d605bb8d8d3ff281c695df1670ab3987"},
+    {file = "mypy-0.902-cp36-cp36m-win_amd64.whl", hash = "sha256:f89bfda7f0f66b789792ab64ce0978e4a991a0e4dd6197349d0767b0f1095b21"},
+    {file = "mypy-0.902-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:746e0b0101b8efec34902810047f26a8c80e1efbb4fc554956d848c05ef85d76"},
+    {file = "mypy-0.902-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:0190fb77e93ce971954c9e54ea61de2802065174e5e990c9d4c1d0f54fbeeca2"},
+    {file = "mypy-0.902-cp37-cp37m-manylinux2010_x86_64.whl", hash = "sha256:b5dfcd22c6bab08dfeded8d5b44bdcb68c6f1ab261861e35c470b89074f78a70"},
+    {file = "mypy-0.902-cp37-cp37m-win_amd64.whl", hash = "sha256:b5ba1f0d5f9087e03bf5958c28d421a03a4c1ad260bf81556195dffeccd979c4"},
+    {file = "mypy-0.902-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:9ef5355eaaf7a23ab157c21a44c614365238a7bdb3552ec3b80c393697d974e1"},
+    {file = "mypy-0.902-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:517e7528d1be7e187a5db7f0a3e479747307c1b897d9706b1c662014faba3116"},
+    {file = "mypy-0.902-cp38-cp38-manylinux2010_x86_64.whl", hash = "sha256:fd634bc17b1e2d6ce716f0e43446d0d61cdadb1efcad5c56ca211c22b246ebc8"},
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+    {file = "mypy-0.902-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:353aac2ce41ddeaf7599f1c73fed2b75750bef3b44b6ad12985a991bc002a0da"},
+    {file = "mypy-0.902-cp39-cp39-macosx_11_0_arm64.whl", hash = "sha256:ae94c31bb556ddb2310e4f913b706696ccbd43c62d3331cd3511caef466871d2"},
+    {file = "mypy-0.902-cp39-cp39-manylinux1_x86_64.whl", hash = "sha256:8be7bbd091886bde9fcafed8dd089a766fa76eb223135fe5c9e9798f78023a20"},
+    {file = "mypy-0.902-cp39-cp39-manylinux2010_x86_64.whl", hash = "sha256:4efc67b9b3e2fddbe395700f91d5b8deb5980bfaaccb77b306310bd0b9e002eb"},
+    {file = "mypy-0.902-cp39-cp39-win_amd64.whl", hash = "sha256:9f1d74eeb3f58c7bd3f3f92b8f63cb1678466a55e2c4612bf36909105d0724ab"},
+    {file = "mypy-0.902-py3-none-any.whl", hash = "sha256:a26d0e53e90815c765f91966442775cf03b8a7514a4e960de7b5320208b07269"},
+    {file = "mypy-0.902.tar.gz", hash = "sha256:9236c21194fde5df1b4d8ebc2ef2c1f2a5dc7f18bcbea54274937cae2e20a01c"},
+]
+mypy-extensions = [
+    {file = "mypy_extensions-0.4.3-py2.py3-none-any.whl", hash = "sha256:090fedd75945a69ae91ce1303b5824f428daf5a028d2f6ab8a299250a846f15d"},
+    {file = "mypy_extensions-0.4.3.tar.gz", hash = "sha256:2d82818f5bb3e369420cb3c4060a7970edba416647068eb4c5343488a6c604a8"},
+]
+nodeenv = [
+    {file = "nodeenv-1.6.0-py2.py3-none-any.whl", hash = "sha256:621e6b7076565ddcacd2db0294c0381e01fd28945ab36bcf00f41c5daf63bef7"},
+    {file = "nodeenv-1.6.0.tar.gz", hash = "sha256:3ef13ff90291ba2a4a7a4ff9a979b63ffdd00a464dbe04acf0ea6471517a4c2b"},
+]
 packaging = [
     {file = "packaging-20.9-py2.py3-none-any.whl", hash = "sha256:67714da7f7bc052e064859c05c595155bd1ee9f69f76557e21f051443c20947a"},
     {file = "packaging-20.9.tar.gz", hash = "sha256:5b327ac1320dc863dca72f4514ecc086f31186744b84a230374cc1fd776feae5"},
@@ -134,6 +329,10 @@ pluggy = [
     {file = "pluggy-0.13.1-py2.py3-none-any.whl", hash = "sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d"},
     {file = "pluggy-0.13.1.tar.gz", hash = "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0"},
 ]
+pre-commit = [
+    {file = "pre_commit-2.13.0-py2.py3-none-any.whl", hash = "sha256:b679d0fddd5b9d6d98783ae5f10fd0c4c59954f375b70a58cbe1ce9bcf9809a4"},
+    {file = "pre_commit-2.13.0.tar.gz", hash = "sha256:764972c60693dc668ba8e86eb29654ec3144501310f7198742a767bec385a378"},
+]
 py = [
     {file = "py-1.10.0-py2.py3-none-any.whl", hash = "sha256:3b80836aa6d1feeaa108e046da6423ab8f6ceda6468545ae8d02d9d58d18818a"},
     {file = "py-1.10.0.tar.gz", hash = "sha256:21b81bda15b66ef5e1a777a21c4dcd9c20ad3efd0b3f817e7a809035269e1bd3"},
@@ -146,6 +345,54 @@ pytest = [
     {file = "pytest-5.4.3-py3-none-any.whl", hash = "sha256:5c0db86b698e8f170ba4582a492248919255fcd4c79b1ee64ace34301fb589a1"},
     {file = "pytest-5.4.3.tar.gz", hash = "sha256:7979331bfcba207414f5e1263b5a0f8f521d0f457318836a7355531ed1a4c7d8"},
 ]
+pyyaml = [
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+    {file = "PyYAML-5.4.1-cp27-cp27m-win32.whl", hash = "sha256:129def1b7c1bf22faffd67b8f3724645203b79d8f4cc81f674654d9902cb4393"},
+    {file = "PyYAML-5.4.1-cp27-cp27m-win_amd64.whl", hash = "sha256:4465124ef1b18d9ace298060f4eccc64b0850899ac4ac53294547536533800c8"},
+    {file = "PyYAML-5.4.1-cp27-cp27mu-manylinux1_x86_64.whl", hash = "sha256:bb4191dfc9306777bc594117aee052446b3fa88737cd13b7188d0e7aa8162185"},
+    {file = "PyYAML-5.4.1-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:6c78645d400265a062508ae399b60b8c167bf003db364ecb26dcab2bda048253"},
+    {file = "PyYAML-5.4.1-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:4e0583d24c881e14342eaf4ec5fbc97f934b999a6828693a99157fde912540cc"},
+    {file = "PyYAML-5.4.1-cp36-cp36m-manylinux2014_aarch64.whl", hash = "sha256:72a01f726a9c7851ca9bfad6fd09ca4e090a023c00945ea05ba1638c09dc3347"},
+    {file = "PyYAML-5.4.1-cp36-cp36m-manylinux2014_s390x.whl", hash = "sha256:895f61ef02e8fed38159bb70f7e100e00f471eae2bc838cd0f4ebb21e28f8541"},
+    {file = "PyYAML-5.4.1-cp36-cp36m-win32.whl", hash = "sha256:3bd0e463264cf257d1ffd2e40223b197271046d09dadf73a0fe82b9c1fc385a5"},
+    {file = "PyYAML-5.4.1-cp36-cp36m-win_amd64.whl", hash = "sha256:e4fac90784481d221a8e4b1162afa7c47ed953be40d31ab4629ae917510051df"},
+    {file = "PyYAML-5.4.1-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:5accb17103e43963b80e6f837831f38d314a0495500067cb25afab2e8d7a4018"},
+    {file = "PyYAML-5.4.1-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:e1d4970ea66be07ae37a3c2e48b5ec63f7ba6804bdddfdbd3cfd954d25a82e63"},
+    {file = "PyYAML-5.4.1-cp37-cp37m-manylinux2014_aarch64.whl", hash = "sha256:cb333c16912324fd5f769fff6bc5de372e9e7a202247b48870bc251ed40239aa"},
+    {file = "PyYAML-5.4.1-cp37-cp37m-manylinux2014_s390x.whl", hash = "sha256:fe69978f3f768926cfa37b867e3843918e012cf83f680806599ddce33c2c68b0"},
+    {file = "PyYAML-5.4.1-cp37-cp37m-win32.whl", hash = "sha256:dd5de0646207f053eb0d6c74ae45ba98c3395a571a2891858e87df7c9b9bd51b"},
+    {file = "PyYAML-5.4.1-cp37-cp37m-win_amd64.whl", hash = "sha256:08682f6b72c722394747bddaf0aa62277e02557c0fd1c42cb853016a38f8dedf"},
+    {file = "PyYAML-5.4.1-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:d2d9808ea7b4af864f35ea216be506ecec180628aced0704e34aca0b040ffe46"},
+    {file = "PyYAML-5.4.1-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:8c1be557ee92a20f184922c7b6424e8ab6691788e6d86137c5d93c1a6ec1b8fb"},
+    {file = "PyYAML-5.4.1-cp38-cp38-manylinux2014_aarch64.whl", hash = "sha256:fd7f6999a8070df521b6384004ef42833b9bd62cfee11a09bda1079b4b704247"},
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+    {file = "PyYAML-5.4.1-cp38-cp38-win_amd64.whl", hash = "sha256:0f5f5786c0e09baddcd8b4b45f20a7b5d61a7e7e99846e3c799b05c7c53fa696"},
+    {file = "PyYAML-5.4.1-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:294db365efa064d00b8d1ef65d8ea2c3426ac366c0c4368d930bf1c5fb497f77"},
+    {file = "PyYAML-5.4.1-cp39-cp39-manylinux1_x86_64.whl", hash = "sha256:74c1485f7707cf707a7aef42ef6322b8f97921bd89be2ab6317fd782c2d53183"},
+    {file = "PyYAML-5.4.1-cp39-cp39-manylinux2014_aarch64.whl", hash = "sha256:d483ad4e639292c90170eb6f7783ad19490e7a8defb3e46f97dfe4bacae89122"},
+    {file = "PyYAML-5.4.1-cp39-cp39-manylinux2014_s390x.whl", hash = "sha256:fdc842473cd33f45ff6bce46aea678a54e3d21f1b61a7750ce3c498eedfe25d6"},
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+    {file = "PyYAML-5.4.1-cp39-cp39-win_amd64.whl", hash = "sha256:c20cfa2d49991c8b4147af39859b167664f2ad4561704ee74c1de03318e898db"},
+    {file = "PyYAML-5.4.1.tar.gz", hash = "sha256:607774cbba28732bfa802b54baa7484215f530991055bb562efbed5b2f20a45e"},
+]
+six = [
+    {file = "six-1.16.0-py2.py3-none-any.whl", hash = "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"},
+    {file = "six-1.16.0.tar.gz", hash = "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926"},
+]
+toml = [
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+    {file = "toml-0.10.2.tar.gz", hash = "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"},
+]
+typing-extensions = [
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+    {file = "typing_extensions-3.10.0.0-py3-none-any.whl", hash = "sha256:779383f6086d90c99ae41cf0ff39aac8a7937a9283ce0a414e5dd782f4c94a84"},
+    {file = "typing_extensions-3.10.0.0.tar.gz", hash = "sha256:50b6f157849174217d0656f99dc82fe932884fb250826c18350e159ec6cdf342"},
+]
+virtualenv = [
+    {file = "virtualenv-20.4.7-py2.py3-none-any.whl", hash = "sha256:2b0126166ea7c9c3661f5b8e06773d28f83322de7a3ff7d06f0aed18c9de6a76"},
+    {file = "virtualenv-20.4.7.tar.gz", hash = "sha256:14fdf849f80dbb29a4eb6caa9875d476ee2a5cf76a5f5415fa2f1606010ab467"},
+]
 wcwidth = [
     {file = "wcwidth-0.2.5-py2.py3-none-any.whl", hash = "sha256:beb4802a9cebb9144e99086eff703a642a13d6a0052920003a230f3294bbe784"},
     {file = "wcwidth-0.2.5.tar.gz", hash = "sha256:c4d647b99872929fdb7bdcaa4fbe7f01413ed3d98077df798530e5b04f116c83"},

pyproject.toml

@@ -9,6 +9,8 @@ python = "^3.9"
 
 [tool.poetry.dev-dependencies]
 pytest = "^5.2"
+mypy = "^0.902"
+pre-commit = "^2.13.0"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]