diff --git a/.flake8 b/.flake8
new file mode 100644
index 0000000..8e6fd7c
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,32 @@
+[flake8]
+ignore =
+    # break after binary op.
+    # black does its thing and I leave it that way
+    W503
+    # f-string is missing placeholders
+    # really don't want to be bothered for so little
+    F541
+    # whitespace before ':'
+    # let black handle that
+    E203
+    # blank line contains whitespace
+    # let black handle that as well
+    W293
+    # do not assign a lambda expression, use a def
+    # I know when I need that one, thank you very much
+    E731
+exclude =
+    .git
+    __pycache__
+    dist
+    build
+per-file-ignores =
+    # Allow re-exporting in __init__.py files
+    __init__.py: F401
+    # Allow star imports in test example files
+    example*.py: F405, F403
+    # Silence weird false positive on inline comments ...
+    jubeatools/formats/jubeat_analyser/symbols.py: E262
+    # there's a field named "l" in a marshmallow schema
+    jubeatools/formats/memon/memon.py: E741
+max-line-length = 120
\ No newline at end of file
diff --git a/docs/repo maintenance.md b/docs/repo maintenance.md
index 7df64bf..0bd6c29 100644
--- a/docs/repo maintenance.md	
+++ b/docs/repo maintenance.md	
@@ -9,9 +9,11 @@
 
 ## Making a new release
 Sanity checks before anything serious happens, from the repo's root :
-1. Run mypy and fix **all** the errors <br> `$ poetry run mypy .`
 1. Format the code <br> `$ poetry run sh ./utils/format_code.sh`
+1. Run checks <br> `$ poetry run sh ./utils/check_code.sh`
 1. Make sure the unit tests pass <br> `$ poetry run pytest`
+1. Fix all encountered errors
+1. Rince and repeat until everythings is ok
 
 Now that this is done you can move on to actually making a new version,
 while still being in the repo's root :
diff --git a/jubeatools/cli.py b/jubeatools/cli.py
index 1127cad..4a8d833 100644
--- a/jubeatools/cli.py
+++ b/jubeatools/cli.py
@@ -1,11 +1,12 @@
 """Command Line Interface"""
+
 from pathlib import Path
-from typing import Any, Dict, Optional
+from typing import Any, Dict
 
 import click
 
 from jubeatools.formats import DUMPERS, LOADERS
-from jubeatools.formats.enum import JUBEAT_ANALYSER_FORMATS, Format
+from jubeatools.formats.enum import Format
 from jubeatools.formats.guess import guess_format
 
 
diff --git a/jubeatools/formats/__init__.py b/jubeatools/formats/__init__.py
index b21ca82..37d5997 100644
--- a/jubeatools/formats/__init__.py
+++ b/jubeatools/formats/__init__.py
@@ -2,10 +2,7 @@
 Module containing all the load/dump code for all file formats
 """
 
-from pathlib import Path
-from typing import IO, Any, Callable, Dict
-
-from jubeatools.song import Song
+from typing import Dict
 
 from .enum import Format
 from .jubeat_analyser import (
diff --git a/jubeatools/formats/jubeat_analyser/__init__.py b/jubeatools/formats/jubeat_analyser/__init__.py
index 6636ffe..9226fe1 100644
--- a/jubeatools/formats/jubeat_analyser/__init__.py
+++ b/jubeatools/formats/jubeat_analyser/__init__.py
@@ -16,11 +16,7 @@ The machine-readable variants or these text formats are partially documented
 - http://yosh52.web.fc2.com/jubeat/holdmarker.html
 """
 
-from .memo1.dump import dump_memo1
-from .memo1.load import load_memo1
-from .memo2.dump import dump_memo2
-from .memo2.load import load_memo2
-from .memo.dump import dump_memo
-from .memo.load import load_memo
-from .mono_column.dump import dump_mono_column
-from .mono_column.load import load_mono_column
+from .memo import dump_memo, load_memo
+from .memo1 import dump_memo1, load_memo1
+from .memo2 import dump_memo2, load_memo2
+from .mono_column import dump_mono_column, load_mono_column
diff --git a/jubeatools/formats/jubeat_analyser/command.py b/jubeatools/formats/jubeat_analyser/command.py
index 3f99e4e..24ecec7 100644
--- a/jubeatools/formats/jubeat_analyser/command.py
+++ b/jubeatools/formats/jubeat_analyser/command.py
@@ -24,9 +24,8 @@ Known hash commands :
   - #bpp              # bytes per panel (2 by default)
 """
 
-from decimal import Decimal
 from numbers import Number
-from typing import Any, Iterable, List, Optional, Tuple, Union
+from typing import Any, List, Optional, Tuple
 
 from parsimonious import Grammar, NodeVisitor, ParseError
 from parsimonious.nodes import Node
@@ -148,5 +147,5 @@ ESCAPE_TABLE = str.maketrans({'"': BACKSLASH + '"', BACKSLASH: BACKSLASH + BACKS
 
 
 def dump_value(value: str) -> str:
-    """backslash-escapes \ and " from a string"""
+    """Escapes backslashes and " from a string"""
     return value.translate(ESCAPE_TABLE)
diff --git a/jubeatools/formats/jubeat_analyser/dump_tools.py b/jubeatools/formats/jubeat_analyser/dump_tools.py
index 7a5a00c..cddca67 100644
--- a/jubeatools/formats/jubeat_analyser/dump_tools.py
+++ b/jubeatools/formats/jubeat_analyser/dump_tools.py
@@ -1,6 +1,6 @@
 """Collection of tools realted to dumping to jubeat analyser formats"""
+
 from abc import ABC, abstractmethod
-from copy import deepcopy
 from dataclasses import dataclass, field
 from decimal import Decimal
 from fractions import Fraction
@@ -19,7 +19,7 @@ from typing import (
     Union,
 )
 
-from more_itertools import collapse, intersperse, mark_ends, windowed
+from more_itertools import windowed
 from sortedcontainers import SortedDict, SortedKeyList
 
 from jubeatools.formats.filetypes import ChartFile
diff --git a/jubeatools/formats/jubeat_analyser/load_tools.py b/jubeatools/formats/jubeat_analyser/load_tools.py
index ba1acae..fe468ce 100644
--- a/jubeatools/formats/jubeat_analyser/load_tools.py
+++ b/jubeatools/formats/jubeat_analyser/load_tools.py
@@ -1,4 +1,5 @@
 """Collection of parsing tools that are common to all the jubeat analyser formats"""
+
 import re
 import warnings
 from collections import Counter
@@ -6,17 +7,7 @@ from copy import deepcopy
 from dataclasses import astuple, dataclass
 from decimal import Decimal
 from itertools import product, zip_longest
-from typing import (
-    AbstractSet,
-    Dict,
-    Iterator,
-    List,
-    Optional,
-    Sequence,
-    Set,
-    Tuple,
-    Union,
-)
+from typing import AbstractSet, Dict, List, Optional, Set, Tuple, Union
 
 import constraint
 from parsimonious import Grammar, NodeVisitor, ParseError
diff --git a/jubeatools/formats/jubeat_analyser/memo/dump.py b/jubeatools/formats/jubeat_analyser/memo/dump.py
index ae5167a..2aef9b7 100644
--- a/jubeatools/formats/jubeat_analyser/memo/dump.py
+++ b/jubeatools/formats/jubeat_analyser/memo/dump.py
@@ -1,19 +1,14 @@
 from collections import ChainMap, defaultdict
-from copy import deepcopy
 from dataclasses import dataclass, field
-from decimal import Decimal
 from fractions import Fraction
-from functools import partial
 from io import StringIO
-from itertools import chain, zip_longest
+from itertools import zip_longest
 from math import ceil
-from pathlib import Path
-from typing import Callable, Dict, Iterator, List, Optional, Set, Tuple, Union, cast
+from typing import Dict, Iterator, List, Union
 
 from more_itertools import chunked, collapse, intersperse, mark_ends, windowed
-from sortedcontainers import SortedKeyList
 
-from jubeatools.formats.filetypes import ChartFile, JubeatFile
+from jubeatools.formats.filetypes import ChartFile
 from jubeatools.song import (
     BeatsTime,
     Chart,
@@ -26,22 +21,17 @@ from jubeatools.song import (
 )
 from jubeatools.version import __version__
 
-from ..command import dump_command
 from ..dump_tools import (
-    BEATS_TIME_TO_SYMBOL,
-    COMMAND_ORDER,
     DEFAULT_EXTRA_SYMBOLS,
     DIRECTION_TO_ARROW,
     DIRECTION_TO_LINE,
     NOTE_TO_CIRCLE_FREE_SYMBOL,
     JubeatAnalyserDumpedSection,
     LongNoteEnd,
-    SortedDefaultDict,
     create_sections_from_chart,
-    fraction_to_decimal,
     jubeat_analyser_file_dumper,
 )
-from ..symbols import CIRCLE_FREE_SYMBOLS, NOTE_SYMBOLS
+from ..symbols import NOTE_SYMBOLS
 
 AnyNote = Union[TapNote, LongNote, LongNoteEnd]
 
diff --git a/jubeatools/formats/jubeat_analyser/memo/load.py b/jubeatools/formats/jubeat_analyser/memo/load.py
index 46ac1bb..f4ebfd1 100644
--- a/jubeatools/formats/jubeat_analyser/memo/load.py
+++ b/jubeatools/formats/jubeat_analyser/memo/load.py
@@ -1,16 +1,13 @@
-import warnings
 from collections import ChainMap
 from copy import deepcopy
 from dataclasses import astuple, dataclass
 from decimal import Decimal
 from functools import reduce
-from itertools import chain, product, zip_longest
+from itertools import product
 from pathlib import Path
-from typing import Dict, Iterator, List, Mapping, Optional, Set, Tuple, Union
+from typing import Dict, Iterator, List, Mapping, Set, Tuple, Union
 
-import constraint
 from more_itertools import collapse, mark_ends
-from parsimonious import Grammar, NodeVisitor, ParseError
 
 from jubeatools.song import (
     BeatsTime,
@@ -31,24 +28,18 @@ from ..files import load_files
 from ..load_tools import (
     CIRCLE_FREE_TO_NOTE_SYMBOL,
     EMPTY_BEAT_SYMBOLS,
-    LONG_ARROWS,
-    LONG_DIRECTION,
     DoubleColumnChartLine,
     DoubleColumnFrame,
     JubeatAnalyserParser,
     UnfinishedLongNote,
-    decimal_to_beats,
     find_long_note_candidates,
     is_double_column_chart_line,
     is_empty_line,
-    is_simple_solution,
-    long_note_solution_heuristic,
     parse_double_column_chart_line,
     pick_correct_long_note_candidates,
-    split_double_byte_line,
 )
 from ..symbol_definition import is_symbol_definition, parse_symbol_definition
-from ..symbols import CIRCLE_FREE_SYMBOLS, NOTE_SYMBOLS
+from ..symbols import CIRCLE_FREE_SYMBOLS
 
 
 class MemoFrame(DoubleColumnFrame):
diff --git a/jubeatools/formats/jubeat_analyser/memo1/dump.py b/jubeatools/formats/jubeat_analyser/memo1/dump.py
index cbee23f..da96201 100644
--- a/jubeatools/formats/jubeat_analyser/memo1/dump.py
+++ b/jubeatools/formats/jubeat_analyser/memo1/dump.py
@@ -1,19 +1,14 @@
-from collections import ChainMap, defaultdict
-from copy import deepcopy
+from collections import defaultdict
 from dataclasses import dataclass, field
-from decimal import Decimal
 from fractions import Fraction
-from functools import partial
 from io import StringIO
-from itertools import chain, zip_longest
+from itertools import zip_longest
 from math import ceil
-from pathlib import Path
-from typing import Dict, Iterator, List, Optional, Set, Tuple, Union
+from typing import Dict, Iterator, List, Union
 
-from more_itertools import chunked, collapse, intersperse, mark_ends, windowed
-from sortedcontainers import SortedKeyList
+from more_itertools import collapse, intersperse, mark_ends, windowed
 
-from jubeatools.formats.filetypes import ChartFile, JubeatFile
+from jubeatools.formats.filetypes import ChartFile
 from jubeatools.song import (
     BeatsTime,
     Chart,
@@ -27,22 +22,16 @@ from jubeatools.song import (
 from jubeatools.utils import lcm
 from jubeatools.version import __version__
 
-from ..command import dump_command
 from ..dump_tools import (
-    BEATS_TIME_TO_SYMBOL,
-    COMMAND_ORDER,
-    DEFAULT_EXTRA_SYMBOLS,
     DIRECTION_TO_ARROW,
     DIRECTION_TO_LINE,
     NOTE_TO_CIRCLE_FREE_SYMBOL,
     JubeatAnalyserDumpedSection,
     LongNoteEnd,
-    SortedDefaultDict,
     create_sections_from_chart,
-    fraction_to_decimal,
     jubeat_analyser_file_dumper,
 )
-from ..symbols import CIRCLE_FREE_SYMBOLS, NOTE_SYMBOLS
+from ..symbols import NOTE_SYMBOLS
 
 AnyNote = Union[TapNote, LongNote, LongNoteEnd]
 
diff --git a/jubeatools/formats/jubeat_analyser/memo1/load.py b/jubeatools/formats/jubeat_analyser/memo1/load.py
index 4479d05..7f1d511 100644
--- a/jubeatools/formats/jubeat_analyser/memo1/load.py
+++ b/jubeatools/formats/jubeat_analyser/memo1/load.py
@@ -1,16 +1,12 @@
-import warnings
-from collections import ChainMap
 from copy import deepcopy
 from dataclasses import astuple, dataclass
 from decimal import Decimal
 from functools import reduce
-from itertools import chain, product, zip_longest
+from itertools import product
 from pathlib import Path
-from typing import Dict, Iterator, List, Mapping, Optional, Set, Tuple, Union
+from typing import Dict, Iterator, List, Mapping, Set, Tuple, Union
 
-import constraint
-from more_itertools import collapse, mark_ends
-from parsimonious import Grammar, NodeVisitor, ParseError
+from more_itertools import mark_ends
 
 from jubeatools.song import (
     BeatsTime,
@@ -31,24 +27,17 @@ from ..files import load_files
 from ..load_tools import (
     CIRCLE_FREE_TO_NOTE_SYMBOL,
     EMPTY_BEAT_SYMBOLS,
-    LONG_ARROWS,
-    LONG_DIRECTION,
     DoubleColumnChartLine,
     DoubleColumnFrame,
     JubeatAnalyserParser,
     UnfinishedLongNote,
-    decimal_to_beats,
     find_long_note_candidates,
     is_double_column_chart_line,
     is_empty_line,
-    is_simple_solution,
-    long_note_solution_heuristic,
     parse_double_column_chart_line,
     pick_correct_long_note_candidates,
-    split_double_byte_line,
 )
-from ..symbol_definition import is_symbol_definition, parse_symbol_definition
-from ..symbols import CIRCLE_FREE_SYMBOLS, NOTE_SYMBOLS
+from ..symbols import CIRCLE_FREE_SYMBOLS
 
 
 class Memo1Frame(DoubleColumnFrame):
diff --git a/jubeatools/formats/jubeat_analyser/memo2/dump.py b/jubeatools/formats/jubeat_analyser/memo2/dump.py
index 50c0113..460f12c 100644
--- a/jubeatools/formats/jubeat_analyser/memo2/dump.py
+++ b/jubeatools/formats/jubeat_analyser/memo2/dump.py
@@ -1,19 +1,15 @@
-from collections import ChainMap, defaultdict
-from copy import deepcopy
+from collections import defaultdict
 from dataclasses import dataclass, field
 from decimal import Decimal
 from fractions import Fraction
-from functools import partial
 from io import StringIO
 from itertools import chain, zip_longest
-from math import ceil
-from pathlib import Path
-from typing import Dict, Iterator, List, Optional, Set, Tuple, Union
+from typing import Dict, Iterator, List, Optional, Union
 
-from more_itertools import chunked, collapse, intersperse, mark_ends, windowed
+from more_itertools import collapse, intersperse, mark_ends, windowed
 from sortedcontainers import SortedKeyList
 
-from jubeatools.formats.filetypes import ChartFile, JubeatFile
+from jubeatools.formats.filetypes import ChartFile
 from jubeatools.song import (
     BeatsTime,
     BPMEvent,
@@ -31,20 +27,15 @@ from jubeatools.version import __version__
 
 from ..command import dump_command
 from ..dump_tools import (
-    BEATS_TIME_TO_SYMBOL,
-    COMMAND_ORDER,
-    DEFAULT_EXTRA_SYMBOLS,
     DIFFICULTIES,
     DIRECTION_TO_ARROW,
     DIRECTION_TO_LINE,
     NOTE_TO_CIRCLE_FREE_SYMBOL,
     LongNoteEnd,
     SortedDefaultDict,
-    create_sections_from_chart,
-    fraction_to_decimal,
     jubeat_analyser_file_dumper,
 )
-from ..symbols import CIRCLE_FREE_SYMBOLS, NOTE_SYMBOLS
+from ..symbols import NOTE_SYMBOLS
 
 AnyNote = Union[TapNote, LongNote, LongNoteEnd]
 
diff --git a/jubeatools/formats/jubeat_analyser/memo2/load.py b/jubeatools/formats/jubeat_analyser/memo2/load.py
index b6c6cc0..df7f24c 100644
--- a/jubeatools/formats/jubeat_analyser/memo2/load.py
+++ b/jubeatools/formats/jubeat_analyser/memo2/load.py
@@ -1,15 +1,10 @@
-import warnings
-from collections import ChainMap
-from copy import deepcopy
 from dataclasses import astuple, dataclass
 from decimal import Decimal
 from functools import reduce
-from itertools import chain, product, zip_longest
+from itertools import product, zip_longest
 from pathlib import Path
 from typing import Dict, Iterator, List, Mapping, Optional, Set, Tuple, Union
 
-import constraint
-from more_itertools import collapse, mark_ends
 from parsimonious import Grammar, NodeVisitor, ParseError
 from parsimonious.nodes import Node
 
@@ -33,22 +28,13 @@ from ..files import load_files
 from ..load_tools import (
     CIRCLE_FREE_TO_NOTE_SYMBOL,
     EMPTY_BEAT_SYMBOLS,
-    LONG_ARROWS,
-    LONG_DIRECTION,
     JubeatAnalyserParser,
     UnfinishedLongNote,
-    decimal_to_beats,
     find_long_note_candidates,
-    is_double_column_chart_line,
     is_empty_line,
-    is_simple_solution,
-    long_note_solution_heuristic,
-    parse_double_column_chart_line,
     pick_correct_long_note_candidates,
-    split_double_byte_line,
 )
-from ..symbol_definition import is_symbol_definition, parse_symbol_definition
-from ..symbols import CIRCLE_FREE_SYMBOLS, NOTE_SYMBOLS
+from ..symbols import CIRCLE_FREE_SYMBOLS
 
 
 @dataclass
diff --git a/jubeatools/formats/jubeat_analyser/mono_column/dump.py b/jubeatools/formats/jubeat_analyser/mono_column/dump.py
index 0ef471c..8d43058 100644
--- a/jubeatools/formats/jubeat_analyser/mono_column/dump.py
+++ b/jubeatools/formats/jubeat_analyser/mono_column/dump.py
@@ -1,18 +1,10 @@
-from collections import ChainMap, defaultdict
 from copy import deepcopy
-from dataclasses import dataclass, field
-from decimal import Decimal
-from fractions import Fraction
-from functools import partial
 from io import StringIO
-from itertools import chain
-from pathlib import Path
-from typing import Dict, Iterator, List, Mapping, Optional, Tuple
+from typing import Dict, Iterator, List
 
-from more_itertools import collapse, intersperse, mark_ends, windowed
-from sortedcontainers import SortedKeyList
+from more_itertools import collapse, intersperse, mark_ends
 
-from jubeatools.formats.filetypes import ChartFile, JubeatFile
+from jubeatools.formats.filetypes import ChartFile
 from jubeatools.song import (
     BeatsTime,
     Chart,
@@ -27,16 +19,13 @@ from jubeatools.version import __version__
 
 from ..dump_tools import (
     BEATS_TIME_TO_SYMBOL,
-    COMMAND_ORDER,
     DEFAULT_EXTRA_SYMBOLS,
     DIRECTION_TO_ARROW,
     DIRECTION_TO_LINE,
     NOTE_TO_CIRCLE_FREE_SYMBOL,
     JubeatAnalyserDumpedSection,
     LongNoteEnd,
-    SortedDefaultDict,
     create_sections_from_chart,
-    fraction_to_decimal,
     jubeat_analyser_file_dumper,
 )
 
@@ -156,7 +145,7 @@ def _dump_mono_column_chart(
     # Actual output to file
     file = StringIO()
     file.write(f"// Converted using jubeatools {__version__}\n")
-    file.write(f"// https://github.com/Stepland/jubeatools\n\n")
+    file.write("// https://github.com/Stepland/jubeatools\n\n")
     for _, section in sections.items():
         file.write(section.render(circle_free) + "\n")
 
diff --git a/jubeatools/formats/jubeat_analyser/mono_column/load.py b/jubeatools/formats/jubeat_analyser/mono_column/load.py
index 6e45515..f2d987a 100644
--- a/jubeatools/formats/jubeat_analyser/mono_column/load.py
+++ b/jubeatools/formats/jubeat_analyser/mono_column/load.py
@@ -1,22 +1,16 @@
-import re
-import warnings
-from collections import Counter
 from copy import deepcopy
 from dataclasses import astuple, dataclass
 from decimal import Decimal
-from enum import Enum
 from functools import reduce
 from itertools import product
 from pathlib import Path
 from typing import Dict, Iterator, List, Set, Tuple, Union
 
-import constraint
 from parsimonious import Grammar, NodeVisitor, ParseError
 from parsimonious.nodes import Node
 
 from jubeatools.song import (
     BeatsTime,
-    BPMEvent,
     Chart,
     LongNote,
     Metadata,
@@ -33,21 +27,16 @@ from ..command import is_command, parse_command
 from ..files import load_files
 from ..load_tools import (
     CIRCLE_FREE_TO_BEATS_TIME,
-    LONG_ARROWS,
-    LONG_DIRECTION,
     JubeatAnalyserParser,
     UnfinishedLongNote,
-    decimal_to_beats,
     find_long_note_candidates,
     is_empty_line,
     is_separator,
-    is_simple_solution,
-    long_note_solution_heuristic,
     pick_correct_long_note_candidates,
     split_double_byte_line,
 )
 from ..symbol_definition import is_symbol_definition, parse_symbol_definition
-from ..symbols import CIRCLE_FREE_SYMBOLS, NOTE_SYMBOLS
+from ..symbols import CIRCLE_FREE_SYMBOLS
 
 mono_column_chart_line_grammar = Grammar(
     r"""
@@ -78,7 +67,9 @@ def is_mono_column_chart_line(line: str) -> bool:
 
 
 def parse_mono_column_chart_line(line: str) -> str:
-    return MonoColumnChartLineVisitor().visit(mono_column_chart_line_grammar.parse(line))  # type: ignore
+    return MonoColumnChartLineVisitor().visit(  # type: ignore
+        mono_column_chart_line_grammar.parse(line)
+    )
 
 
 @dataclass
diff --git a/jubeatools/formats/jubeat_analyser/tests/memo/test_memo.py b/jubeatools/formats/jubeat_analyser/tests/memo/test_memo.py
index 11b117a..5061aa6 100644
--- a/jubeatools/formats/jubeat_analyser/tests/memo/test_memo.py
+++ b/jubeatools/formats/jubeat_analyser/tests/memo/test_memo.py
@@ -1,20 +1,15 @@
-import tempfile
 from decimal import Decimal
-from fractions import Fraction
 from pathlib import Path
 from typing import Set, Union
 
 from hypothesis import example, given
-from hypothesis import note as hypothesis_note
 from hypothesis import strategies as st
 
 from jubeatools import song
 from jubeatools.formats.enum import Format
-from jubeatools.formats.guess import guess_format
-from jubeatools.formats.jubeat_analyser.memo.dump import _dump_memo_chart, dump_memo
-from jubeatools.formats.jubeat_analyser.memo.load import MemoParser, load_memo
+from jubeatools.formats.jubeat_analyser.memo.dump import _dump_memo_chart
+from jubeatools.formats.jubeat_analyser.memo.load import MemoParser
 from jubeatools.testutils import strategies as jbst
-from jubeatools.testutils.typing import DrawFunc
 
 from ..test_utils import load_and_dump_then_check, memo_compatible_song
 from . import example1, example2, example3
diff --git a/jubeatools/formats/jubeat_analyser/tests/memo1/test_memo1.py b/jubeatools/formats/jubeat_analyser/tests/memo1/test_memo1.py
index f6177f6..29a64a0 100644
--- a/jubeatools/formats/jubeat_analyser/tests/memo1/test_memo1.py
+++ b/jubeatools/formats/jubeat_analyser/tests/memo1/test_memo1.py
@@ -7,7 +7,7 @@ from hypothesis import strategies as st
 
 from jubeatools import song
 from jubeatools.formats import Format
-from jubeatools.formats.jubeat_analyser.memo1.dump import _dump_memo1_chart, dump_memo1
+from jubeatools.formats.jubeat_analyser.memo1.dump import _dump_memo1_chart
 from jubeatools.formats.jubeat_analyser.memo1.load import Memo1Parser
 from jubeatools.testutils.strategies import NoteOption
 from jubeatools.testutils.strategies import notes as notes_strat
diff --git a/jubeatools/formats/jubeat_analyser/tests/memo2/test_memo2.py b/jubeatools/formats/jubeat_analyser/tests/memo2/test_memo2.py
index d7ac0ef..6097236 100644
--- a/jubeatools/formats/jubeat_analyser/tests/memo2/test_memo2.py
+++ b/jubeatools/formats/jubeat_analyser/tests/memo2/test_memo2.py
@@ -14,7 +14,6 @@ from jubeatools.song import (
     Chart,
     LongNote,
     Metadata,
-    NotePosition,
     SecondsTime,
     Song,
     TapNote,
diff --git a/jubeatools/formats/jubeat_analyser/tests/test_examples.py b/jubeatools/formats/jubeat_analyser/tests/test_examples.py
index af66d87..061a271 100644
--- a/jubeatools/formats/jubeat_analyser/tests/test_examples.py
+++ b/jubeatools/formats/jubeat_analyser/tests/test_examples.py
@@ -1,4 +1,3 @@
-from functools import wraps
 from importlib import resources
 
 import pytest
@@ -14,4 +13,4 @@ def test_RorataJins_example() -> None:
         with resources.path(data, "RorataJin's example.txt") as p:
             format_ = guess_format(p)
             loader = LOADERS[format_]
-            song = loader(p)
+            _ = loader(p)
diff --git a/jubeatools/formats/memon/memon.py b/jubeatools/formats/memon/memon.py
index 71d77ef..8f3877f 100644
--- a/jubeatools/formats/memon/memon.py
+++ b/jubeatools/formats/memon/memon.py
@@ -1,7 +1,7 @@
 from io import StringIO
 from itertools import chain
 from pathlib import Path
-from typing import IO, Any, Dict, Iterable, List, Mapping, Tuple, Union
+from typing import Any, Dict, List, Union
 
 import simplejson as json
 from marshmallow import (
@@ -9,12 +9,12 @@ from marshmallow import (
     Schema,
     ValidationError,
     fields,
-    post_load,
     validate,
     validates_schema,
 )
+from multidict import MultiDict
 
-from jubeatools.song import *
+from jubeatools import song as jbt
 from jubeatools.utils import lcm
 
 # v0.x.x long note value :
@@ -134,36 +134,38 @@ def _load_raw_memon(file: Path) -> Dict[str, Any]:
         return res
 
 
-def _load_memon_note_v0(note: dict, resolution: int) -> Union[TapNote, LongNote]:
-    position = NotePosition.from_index(note["n"])
-    time = beats_time_from_ticks(ticks=note["t"], resolution=resolution)
+def _load_memon_note_v0(
+    note: dict, resolution: int
+) -> Union[jbt.TapNote, jbt.LongNote]:
+    position = jbt.NotePosition.from_index(note["n"])
+    time = jbt.beats_time_from_ticks(ticks=note["t"], resolution=resolution)
     if note["l"] > 0:
-        duration = beats_time_from_ticks(ticks=note["l"], resolution=resolution)
-        tail_tip = position + NotePosition(*P_VALUE_TO_X_Y_OFFSET[note["p"]])
-        return LongNote(time, position, duration, tail_tip)
+        duration = jbt.beats_time_from_ticks(ticks=note["l"], resolution=resolution)
+        tail_tip = position + jbt.NotePosition(*P_VALUE_TO_X_Y_OFFSET[note["p"]])
+        return jbt.LongNote(time, position, duration, tail_tip)
     else:
-        return TapNote(time, position)
+        return jbt.TapNote(time, position)
 
 
-def load_memon_legacy(file: Path) -> Song:
+def load_memon_legacy(file: Path) -> jbt.Song:
     raw_memon = _load_raw_memon(file)
     schema = Memon_legacy()
     memon = schema.load(raw_memon)
-    metadata = Metadata(
+    metadata = jbt.Metadata(
         title=memon["metadata"]["title"],
         artist=memon["metadata"]["artist"],
         audio=Path(memon["metadata"]["audio"]),
         cover=Path(memon["metadata"]["cover"]),
     )
-    global_timing = Timing(
-        events=[BPMEvent(time=BeatsTime(0), BPM=memon["metadata"]["BPM"])],
-        beat_zero_offset=SecondsTime(-memon["metadata"]["offset"]),
+    global_timing = jbt.Timing(
+        events=[jbt.BPMEvent(time=jbt.BeatsTime(0), BPM=memon["metadata"]["BPM"])],
+        beat_zero_offset=jbt.SecondsTime(-memon["metadata"]["offset"]),
     )
-    charts: MultiDict[Chart] = MultiDict()
+    charts: MultiDict[jbt.Chart] = MultiDict()
     for memon_chart in memon["data"]:
         charts.add(
             memon_chart["dif_name"],
-            Chart(
+            jbt.Chart(
                 level=memon_chart["level"],
                 notes=[
                     _load_memon_note_v0(note, memon_chart["resolution"])
@@ -172,28 +174,28 @@ def load_memon_legacy(file: Path) -> Song:
             ),
         )
 
-    return Song(metadata=metadata, charts=charts, global_timing=global_timing)
+    return jbt.Song(metadata=metadata, charts=charts, global_timing=global_timing)
 
 
-def load_memon_0_1_0(file: Path) -> Song:
+def load_memon_0_1_0(file: Path) -> jbt.Song:
     raw_memon = _load_raw_memon(file)
     schema = Memon_0_1_0()
     memon = schema.load(raw_memon)
-    metadata = Metadata(
+    metadata = jbt.Metadata(
         title=memon["metadata"]["title"],
         artist=memon["metadata"]["artist"],
         audio=Path(memon["metadata"]["audio"]),
         cover=Path(memon["metadata"]["cover"]),
     )
-    global_timing = Timing(
-        events=[BPMEvent(time=BeatsTime(0), BPM=memon["metadata"]["BPM"])],
-        beat_zero_offset=SecondsTime(-memon["metadata"]["offset"]),
+    global_timing = jbt.Timing(
+        events=[jbt.BPMEvent(time=jbt.BeatsTime(0), BPM=memon["metadata"]["BPM"])],
+        beat_zero_offset=jbt.SecondsTime(-memon["metadata"]["offset"]),
     )
-    charts: MultiDict[Chart] = MultiDict()
+    charts: MultiDict[jbt.Chart] = MultiDict()
     for difficulty, memon_chart in memon["data"].items():
         charts.add(
             difficulty,
-            Chart(
+            jbt.Chart(
                 level=memon_chart["level"],
                 notes=[
                     _load_memon_note_v0(note, memon_chart["resolution"])
@@ -202,10 +204,10 @@ def load_memon_0_1_0(file: Path) -> Song:
             ),
         )
 
-    return Song(metadata=metadata, charts=charts, global_timing=global_timing)
+    return jbt.Song(metadata=metadata, charts=charts, global_timing=global_timing)
 
 
-def load_memon_0_2_0(file: Path) -> Song:
+def load_memon_0_2_0(file: Path) -> jbt.Song:
     raw_memon = _load_raw_memon(file)
     schema = Memon_0_2_0()
     memon = schema.load(raw_memon)
@@ -213,24 +215,24 @@ def load_memon_0_2_0(file: Path) -> Song:
     if "preview" in memon["metadata"]:
         start = memon["metadata"]["preview"]["position"]
         length = memon["metadata"]["preview"]["length"]
-        preview = Preview(start, length)
+        preview = jbt.Preview(start, length)
 
-    metadata = Metadata(
+    metadata = jbt.Metadata(
         title=memon["metadata"]["title"],
         artist=memon["metadata"]["artist"],
         audio=Path(memon["metadata"]["audio"]),
         cover=Path(memon["metadata"]["cover"]),
         preview=preview,
     )
-    global_timing = Timing(
-        events=[BPMEvent(time=BeatsTime(0), BPM=memon["metadata"]["BPM"])],
-        beat_zero_offset=SecondsTime(-memon["metadata"]["offset"]),
+    global_timing = jbt.Timing(
+        events=[jbt.BPMEvent(time=jbt.BeatsTime(0), BPM=memon["metadata"]["BPM"])],
+        beat_zero_offset=jbt.SecondsTime(-memon["metadata"]["offset"]),
     )
-    charts: MultiDict[Chart] = MultiDict()
+    charts: MultiDict[jbt.Chart] = MultiDict()
     for difficulty, memon_chart in memon["data"].items():
         charts.add(
             difficulty,
-            Chart(
+            jbt.Chart(
                 level=memon_chart["level"],
                 notes=[
                     _load_memon_note_v0(note, memon_chart["resolution"])
@@ -239,10 +241,10 @@ def load_memon_0_2_0(file: Path) -> Song:
             ),
         )
 
-    return Song(metadata=metadata, charts=charts, global_timing=global_timing)
+    return jbt.Song(metadata=metadata, charts=charts, global_timing=global_timing)
 
 
-def _long_note_tail_value_v0(note: LongNote) -> int:
+def _long_note_tail_value_v0(note: jbt.LongNote) -> int:
     dx = note.tail_tip.x - note.position.x
     dy = note.tail_tip.y - note.position.y
     try:
@@ -253,7 +255,7 @@ def _long_note_tail_value_v0(note: LongNote) -> int:
         ) from None
 
 
-def _get_timing(song: Song) -> Timing:
+def _get_timing(song: jbt.Song) -> jbt.Timing:
     if song.global_timing is not None:
         return song.global_timing
     else:
@@ -262,7 +264,7 @@ def _get_timing(song: Song) -> Timing:
         )
 
 
-def _raise_if_unfit_for_v0(song: Song, version: str) -> None:
+def _raise_if_unfit_for_v0(song: jbt.Song, version: str) -> None:
 
     """Raises an exception if the Song object is ill-formed or contains information
     that cannot be represented in a memon v0.x.y file (includes legacy)"""
@@ -311,21 +313,21 @@ def _dump_to_json(memon: dict) -> bytes:
     return memon_fp.getvalue().encode("utf-8")
 
 
-def _compute_resolution(notes: List[Union[TapNote, LongNote]]) -> int:
+def _compute_resolution(notes: List[Union[jbt.TapNote, jbt.LongNote]]) -> int:
     return lcm(
         *chain(
             iter(note.time.denominator for note in notes),
             iter(
                 note.duration.denominator
                 for note in notes
-                if isinstance(note, LongNote)
+                if isinstance(note, jbt.LongNote)
             ),
         )
     )
 
 
 def _dump_memon_note_v0(
-    note: Union[TapNote, LongNote], resolution: int
+    note: Union[jbt.TapNote, jbt.LongNote], resolution: int
 ) -> Dict[str, int]:
     """converts a note into the {n, t, l, p} form"""
     memon_note = {
@@ -334,7 +336,7 @@ def _dump_memon_note_v0(
         "l": 0,
         "p": 0,
     }
-    if isinstance(note, LongNote):
+    if isinstance(note, jbt.LongNote):
         memon_note["l"] = note.duration.numerator * (
             resolution // note.duration.denominator
         )
@@ -343,7 +345,7 @@ def _dump_memon_note_v0(
     return memon_note
 
 
-def dump_memon_legacy(song: Song, path: Path, **kwargs: dict) -> Dict[Path, bytes]:
+def dump_memon_legacy(song: jbt.Song, path: Path, **kwargs: dict) -> Dict[Path, bytes]:
 
     _raise_if_unfit_for_v0(song, "legacy")
     timing = _get_timing(song)
@@ -383,7 +385,7 @@ def dump_memon_legacy(song: Song, path: Path, **kwargs: dict) -> Dict[Path, byte
     return {filepath: _dump_to_json(memon)}
 
 
-def dump_memon_0_1_0(song: Song, path: Path, **kwargs: dict) -> Dict[Path, bytes]:
+def dump_memon_0_1_0(song: jbt.Song, path: Path, **kwargs: dict) -> Dict[Path, bytes]:
 
     _raise_if_unfit_for_v0(song, "v0.1.0")
     timing = _get_timing(song)
@@ -419,7 +421,7 @@ def dump_memon_0_1_0(song: Song, path: Path, **kwargs: dict) -> Dict[Path, bytes
     return {filepath: _dump_to_json(memon)}
 
 
-def dump_memon_0_2_0(song: Song, path: Path, **kwargs: dict) -> Dict[Path, bytes]:
+def dump_memon_0_2_0(song: jbt.Song, path: Path, **kwargs: dict) -> Dict[Path, bytes]:
 
     _raise_if_unfit_for_v0(song, "v0.2.0")
     timing = _get_timing(song)
diff --git a/jubeatools/formats/memon/test_memon.py b/jubeatools/formats/memon/test_memon.py
index ee3ceae..0e61ee3 100644
--- a/jubeatools/formats/memon/test_memon.py
+++ b/jubeatools/formats/memon/test_memon.py
@@ -1,6 +1,5 @@
 import tempfile
 from pathlib import Path
-from typing import Callable
 
 import hypothesis.strategies as st
 from hypothesis import given
diff --git a/jubeatools/song.py b/jubeatools/song.py
index ff29d1b..59ae26a 100644
--- a/jubeatools/song.py
+++ b/jubeatools/song.py
@@ -6,9 +6,9 @@ Every output format is created from a Song instance
 Most timing-related info is stored as beat fractions,
 otherwise a decimal number of seconds is used
 """
+
 from __future__ import annotations
 
-from collections import UserList, namedtuple
 from dataclasses import astuple, dataclass, field
 from decimal import Decimal
 from fractions import Fraction
diff --git a/jubeatools/testutils/strategies.py b/jubeatools/testutils/strategies.py
index 6e20290..d89e1c7 100644
--- a/jubeatools/testutils/strategies.py
+++ b/jubeatools/testutils/strategies.py
@@ -1,11 +1,12 @@
 """
 Hypothesis strategies to generate notes and charts
 """
+
 from decimal import Decimal
-from enum import Enum, Flag, auto
+from enum import Flag, auto
 from itertools import product
 from pathlib import Path
-from typing import Any, Callable, Dict, List, Optional, Set, TypeVar, Union
+from typing import Any, Dict, Optional, Set, Union
 
 import hypothesis.strategies as st
 from multidict import MultiDict
diff --git a/jubeatools/utils.py b/jubeatools/utils.py
index 7ed459d..85e9b6b 100644
--- a/jubeatools/utils.py
+++ b/jubeatools/utils.py
@@ -1,7 +1,7 @@
 import unicodedata
 from functools import reduce
 from math import gcd
-from typing import Callable, Iterable, Optional, TypeVar
+from typing import Callable, Optional, TypeVar
 
 
 def single_lcm(a: int, b: int) -> int:
diff --git a/poetry.lock b/poetry.lock
index 84dc9ac..a10c0c0 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -28,6 +28,31 @@ docs = ["furo", "sphinx", "zope.interface"]
 tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
 tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six"]
 
+[[package]]
+name = "autoflake"
+version = "1.4"
+description = "Removes unused imports and unused variables"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+pyflakes = ">=1.1.0"
+
+[[package]]
+name = "autoimport"
+version = "0.7.0"
+description = "Autoimport missing python libraries."
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+autoflake = "*"
+Click = "*"
+pyprojroot = "*"
+sh = "*"
+
 [[package]]
 name = "black"
 version = "21.4b2"
@@ -65,6 +90,19 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[[package]]
+name = "flake8"
+version = "3.9.1"
+description = "the modular source code checker: pep8 pyflakes and co"
+category = "dev"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
+
+[package.dependencies]
+mccabe = ">=0.6.0,<0.7.0"
+pycodestyle = ">=2.7.0,<2.8.0"
+pyflakes = ">=2.3.0,<2.4.0"
+
 [[package]]
 name = "hypothesis"
 version = "6.10.1"
@@ -129,6 +167,14 @@ docs = ["sphinx (==3.4.3)", "sphinx-issues (==1.2.0)", "alabaster (==0.7.12)", "
 lint = ["mypy (==0.812)", "flake8 (==3.9.0)", "flake8-bugbear (==21.3.2)", "pre-commit (>=2.4,<3.0)"]
 tests = ["pytest", "pytz", "simplejson"]
 
+[[package]]
+name = "mccabe"
+version = "0.6.1"
+description = "McCabe checker, plugin for flake8"
+category = "dev"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "more-itertools"
 version = "8.7.0"
@@ -230,6 +276,22 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[[package]]
+name = "pycodestyle"
+version = "2.7.0"
+description = "Python style guide checker"
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[[package]]
+name = "pyflakes"
+version = "2.3.1"
+description = "passive checker of Python programs"
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
 [[package]]
 name = "pyparsing"
 version = "2.4.7"
@@ -238,6 +300,14 @@ category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
+[[package]]
+name = "pyprojroot"
+version = "0.2.0"
+description = "Find project root paths and return relative project files"
+category = "dev"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "pytest"
 version = "6.2.3"
@@ -290,6 +360,14 @@ python-versions = "*"
 [package.extras]
 dev = ["pytest"]
 
+[[package]]
+name = "sh"
+version = "1.14.1"
+description = "Python subprocess replacement"
+category = "dev"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "simplejson"
 version = "3.17.2"
@@ -341,7 +419,7 @@ python-versions = "*"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.8"
-content-hash = "2f391539f8bf0d106956ec4f499fc1c98a2305e94cbd2682d913885d78d7a4dd"
+content-hash = "4065f5a647b6cfb73d1aeceaae1fee4f94ecccdaa807aa134d3c307c6ecfbbd9"
 
 [metadata.files]
 appdirs = [
@@ -356,6 +434,13 @@ attrs = [
     {file = "attrs-20.3.0-py2.py3-none-any.whl", hash = "sha256:31b2eced602aa8423c2aea9c76a724617ed67cf9513173fd3a4f03e3a929c7e6"},
     {file = "attrs-20.3.0.tar.gz", hash = "sha256:832aa3cde19744e49938b91fea06d69ecb9e649c93ba974535d08ad92164f700"},
 ]
+autoflake = [
+    {file = "autoflake-1.4.tar.gz", hash = "sha256:61a353012cff6ab94ca062823d1fb2f692c4acda51c76ff83a8d77915fba51ea"},
+]
+autoimport = [
+    {file = "autoimport-0.7.0-py3-none-any.whl", hash = "sha256:d98ae9100d7dfbac7183336c69d2a87bfbeebcdeb59253760f1e2a9db27fc970"},
+    {file = "autoimport-0.7.0.tar.gz", hash = "sha256:1c15c013e9029ec252fa8a1895570c34ff5676eabbdd85ae9514024e22ffee34"},
+]
 black = [
     {file = "black-21.4b2-py3-none-any.whl", hash = "sha256:bff7067d8bc25eb21dcfdbc8c72f2baafd9ec6de4663241a52fb904b304d391f"},
     {file = "black-21.4b2.tar.gz", hash = "sha256:fc9bcf3b482b05c1f35f6a882c079dc01b9c7795827532f4cc43c0ec88067bbc"},
@@ -368,6 +453,10 @@ colorama = [
     {file = "colorama-0.4.4-py2.py3-none-any.whl", hash = "sha256:9f47eda37229f68eee03b24b9748937c7dc3868f906e8ba69fbcbdd3bc5dc3e2"},
     {file = "colorama-0.4.4.tar.gz", hash = "sha256:5941b2b48a20143d2267e95b1c2a7603ce057ee39fd88e7329b0c292aa16869b"},
 ]
+flake8 = [
+    {file = "flake8-3.9.1-py2.py3-none-any.whl", hash = "sha256:3b9f848952dddccf635be78098ca75010f073bfe14d2c6bda867154bea728d2a"},
+    {file = "flake8-3.9.1.tar.gz", hash = "sha256:1aa8990be1e689d96c745c5682b687ea49f2e05a443aff1f8251092b0014e378"},
+]
 hypothesis = [
     {file = "hypothesis-6.10.1-py3-none-any.whl", hash = "sha256:1d65f58d82d1cbd35b6441bda3bb11cb1adc879d6b2af191aea388fa412171b1"},
     {file = "hypothesis-6.10.1.tar.gz", hash = "sha256:586b6c46e90878c2546743afbed348bca51e1f30e3461fa701fad58c2c47c650"},
@@ -384,6 +473,10 @@ marshmallow = [
     {file = "marshmallow-3.11.1-py2.py3-none-any.whl", hash = "sha256:0dd42891a5ef288217ed6410917f3c6048f585f8692075a0052c24f9bfff9dfd"},
     {file = "marshmallow-3.11.1.tar.gz", hash = "sha256:16e99cb7f630c0ef4d7d364ed0109ac194268dde123966076ab3dafb9ae3906b"},
 ]
+mccabe = [
+    {file = "mccabe-0.6.1-py2.py3-none-any.whl", hash = "sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42"},
+    {file = "mccabe-0.6.1.tar.gz", hash = "sha256:dd8d182285a0fe56bace7f45b5e7d1a6ebcbf524e8f3bd87eb0f125271b8831f"},
+]
 more-itertools = [
     {file = "more-itertools-8.7.0.tar.gz", hash = "sha256:c5d6da9ca3ff65220c3bfd2a8db06d698f05d4d2b9be57e1deb2be5a45019713"},
     {file = "more_itertools-8.7.0-py3-none-any.whl", hash = "sha256:5652a9ac72209ed7df8d9c15daf4e1aa0e3d2ccd3c87f8265a0673cd9cbc9ced"},
@@ -478,10 +571,22 @@ py = [
     {file = "py-1.10.0-py2.py3-none-any.whl", hash = "sha256:3b80836aa6d1feeaa108e046da6423ab8f6ceda6468545ae8d02d9d58d18818a"},
     {file = "py-1.10.0.tar.gz", hash = "sha256:21b81bda15b66ef5e1a777a21c4dcd9c20ad3efd0b3f817e7a809035269e1bd3"},
 ]
+pycodestyle = [
+    {file = "pycodestyle-2.7.0-py2.py3-none-any.whl", hash = "sha256:514f76d918fcc0b55c6680472f0a37970994e07bbb80725808c17089be302068"},
+    {file = "pycodestyle-2.7.0.tar.gz", hash = "sha256:c389c1d06bf7904078ca03399a4816f974a1d590090fecea0c63ec26ebaf1cef"},
+]
+pyflakes = [
+    {file = "pyflakes-2.3.1-py2.py3-none-any.whl", hash = "sha256:7893783d01b8a89811dd72d7dfd4d84ff098e5eed95cfa8905b22bbffe52efc3"},
+    {file = "pyflakes-2.3.1.tar.gz", hash = "sha256:f5bc8ecabc05bb9d291eb5203d6810b49040f6ff446a756326104746cc00c1db"},
+]
 pyparsing = [
     {file = "pyparsing-2.4.7-py2.py3-none-any.whl", hash = "sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b"},
     {file = "pyparsing-2.4.7.tar.gz", hash = "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1"},
 ]
+pyprojroot = [
+    {file = "pyprojroot-0.2.0-py3-none-any.whl", hash = "sha256:741e8b4878a0d6bb6b06ec09aa05797130289e2127aa595b8f1cbadce697909f"},
+    {file = "pyprojroot-0.2.0.tar.gz", hash = "sha256:a79900dc52ee097bfd8d917a3d45e2b98494c47a57ba3a71bf609d7a156732e8"},
+]
 pytest = [
     {file = "pytest-6.2.3-py3-none-any.whl", hash = "sha256:6ad9c7bdf517a808242b998ac20063c41532a570d088d77eec1ee12b0b5574bc"},
     {file = "pytest-6.2.3.tar.gz", hash = "sha256:671238a46e4df0f3498d1c3270e5deb9b32d25134c99b7d75370a68cfbe9b634"},
@@ -535,6 +640,10 @@ regex = [
 rope = [
     {file = "rope-0.17.0.tar.gz", hash = "sha256:658ad6705f43dcf3d6df379da9486529cf30e02d9ea14c5682aa80eb33b649e1"},
 ]
+sh = [
+    {file = "sh-1.14.1-py2.py3-none-any.whl", hash = "sha256:75e86a836f47de095d4531718fe8489e6f7446c75ddfa5596f632727b919ffae"},
+    {file = "sh-1.14.1.tar.gz", hash = "sha256:39aa9af22f6558a0c5d132881cf43e34828ca03e4ae11114852ca6a55c7c1d8e"},
+]
 simplejson = [
     {file = "simplejson-3.17.2-cp27-cp27m-macosx_10_13_x86_64.whl", hash = "sha256:2d3eab2c3fe52007d703a26f71cf649a8c771fcdd949a3ae73041ba6797cfcf8"},
     {file = "simplejson-3.17.2-cp27-cp27m-manylinux1_i686.whl", hash = "sha256:813846738277729d7db71b82176204abc7fdae2f566e2d9fcf874f9b6472e3e6"},
diff --git a/pyproject.toml b/pyproject.toml
index 8b51a1b..ce75734 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,6 +26,8 @@ hypothesis = "^6.10.1"
 mypy = "^0.812"
 isort = "^4.3.21"
 toml = "^0.10.2"
+flake8 = "^3.9.1"
+autoimport = "^0.7.0"
 
 [tool.poetry.scripts]
 jubeatools = 'jubeatools.cli:convert'
diff --git a/utils/check_code.sh b/utils/check_code.sh
new file mode 100755
index 0000000..e84b441
--- /dev/null
+++ b/utils/check_code.sh
@@ -0,0 +1,2 @@
+flake8
+mypy jubeatools
\ No newline at end of file
diff --git a/utils/format_code.sh b/utils/format_code.sh
index c0601fa..7081492 100755
--- a/utils/format_code.sh
+++ b/utils/format_code.sh
@@ -1,2 +1,15 @@
+# find all files with unused imports, then hand them off to autoimport
+flake8 \
+    --isolated \
+    --select=F401 \
+    --format='%(path)s' \
+    --exclude=__init__.py \
+| sort \
+| uniq \
+| xargs autoimport
+
+# auto-sort imports in all files
 isort -y
+
+# format code
 black jubeatools
\ No newline at end of file