diff --git a/roentgen.py b/roentgen.py
index 40e0220..55ea436 100644
--- a/roentgen.py
+++ b/roentgen.py
@@ -6,8 +6,9 @@ Author: Sergey Vartanov (me@enzet.ru).
 import argparse
 import os
 import sys
-import svgwrite
+
 import numpy as np
+import svgwrite
 
 from roentgen import ui
 from roentgen.constructor import Constructor
@@ -15,13 +16,13 @@ from roentgen.flinger import Flinger
 from roentgen.grid import draw_all_icons
 from roentgen.icon import IconExtractor
 from roentgen.mapper import (
-    Painter, check_level_number, check_level_overground,
-    ICONS_FILE_NAME, AUTHOR_MODE, CREATION_TIME_MODE, TAGS_FILE_NAME
+    AUTHOR_MODE, CREATION_TIME_MODE, ICONS_FILE_NAME, Painter, TAGS_FILE_NAME,
+    check_level_number, check_level_overground
 )
 from roentgen.osm_getter import get_osm
 from roentgen.osm_reader import Map, OSMReader, OverpassReader
 from roentgen.point import Point
-from roentgen.scheme import Scheme, LineStyle
+from roentgen.scheme import LineStyle, Scheme
 from roentgen.util import MinMax
 
 
diff --git a/roentgen/grid.py b/roentgen/grid.py
index 4f3e31a..b6af702 100644
--- a/roentgen/grid.py
+++ b/roentgen/grid.py
@@ -10,7 +10,7 @@ import numpy as np
 from colour import Color
 from svgwrite import Drawing
 
-from roentgen.icon import Shape, IconExtractor
+from roentgen.icon import IconExtractor, Shape
 from roentgen.scheme import Scheme
 
 
diff --git a/roentgen/mapper.py b/roentgen/mapper.py
index 79da8a1..f8d911d 100644
--- a/roentgen/mapper.py
+++ b/roentgen/mapper.py
@@ -3,9 +3,6 @@ Simple OpenStreetMap renderer.
 
 Author: Sergey Vartanov (me@enzet.ru).
 """
-import argparse
-import os
-import sys
 from typing import Any, Dict
 
 import numpy as np
@@ -19,13 +16,10 @@ from roentgen import ui
 from roentgen.constructor import Building, Constructor, Figure, Segment
 from roentgen.direction import DirectionSet, Sector
 from roentgen.flinger import Flinger
-from roentgen.grid import draw_all_icons
 from roentgen.icon import IconExtractor
-from roentgen.osm_getter import get_osm
-from roentgen.osm_reader import Map, OSMReader, OverpassReader
+from roentgen.osm_reader import Map
 from roentgen.point import Occupied, Point
 from roentgen.scheme import Scheme
-from roentgen.util import MinMax
 
 ICONS_FILE_NAME: str = "icons/icons.svg"
 TAGS_FILE_NAME: str = "data/tags.yml"
diff --git a/roentgen/point.py b/roentgen/point.py
index ddae6fe..3331200 100644
--- a/roentgen/point.py
+++ b/roentgen/point.py
@@ -1,4 +1,3 @@
-from dataclasses import dataclass
 from typing import Dict, List, Optional
 
 import numpy as np
diff --git a/roentgen/scheme.py b/roentgen/scheme.py
index f8a2294..e9cb008 100644
--- a/roentgen/scheme.py
+++ b/roentgen/scheme.py
@@ -11,7 +11,7 @@ from typing import Any, Dict, List, Optional, Set, Tuple, Union
 import yaml
 from colour import Color
 
-from roentgen.icon import DEFAULT_SHAPE_ID, Shape, IconExtractor
+from roentgen.icon import DEFAULT_SHAPE_ID, IconExtractor, Shape
 from roentgen.text import Label, get_address, get_text
 
 DEFAULT_COLOR: Color = Color("#444444")
diff --git a/roentgen/text.py b/roentgen/text.py
index 1ca19a3..3023d17 100644
--- a/roentgen/text.py
+++ b/roentgen/text.py
@@ -7,6 +7,7 @@ from dataclasses import dataclass
 from typing import Any, Dict, List
 
 from colour import Color
+
 DEFAULT_COLOR: Color = Color("#444444")
 
 
diff --git a/test/test_icons.py b/test/test_icons.py
index d72a6a9..558e83b 100644
--- a/test/test_icons.py
+++ b/test/test_icons.py
@@ -4,8 +4,8 @@ Author: Sergey Vartanov (me@enzet.ru).
 from os import makedirs
 from typing import Dict
 
-from roentgen.icon import IconExtractor
 from roentgen.grid import draw_all_icons
+from roentgen.icon import IconExtractor
 from roentgen.scheme import Scheme