diff --git a/demo/cabaret.py b/demo/cabaret.py
index 353a58a..9e52355 100755
--- a/demo/cabaret.py
+++ b/demo/cabaret.py
@@ -17,8 +17,10 @@
 #
 # You should have received a copy of the GNU Lesser General Public License
 # along with pygal. If not, see <http://www.gnu.org/licenses/>.
-from cabaret import create_app
 import logging
+
+from cabaret import create_app
+
 app = create_app()
 
 try:
diff --git a/demo/moulinrouge.py b/demo/moulinrouge.py
index b9b0ae3..3ab1fe9 100755
--- a/demo/moulinrouge.py
+++ b/demo/moulinrouge.py
@@ -17,8 +17,10 @@
 #
 # You should have received a copy of the GNU Lesser General Public License
 # along with pygal. If not, see <http://www.gnu.org/licenses/>.
-from moulinrouge import create_app
 import logging
+
+from moulinrouge import create_app
+
 app = create_app()
 
 try:
diff --git a/demo/moulinrouge/tests.py b/demo/moulinrouge/tests.py
index f03895e..0d8d345 100644
--- a/demo/moulinrouge/tests.py
+++ b/demo/moulinrouge/tests.py
@@ -1,10 +1,17 @@
 # -*- coding: utf-8 -*-
 # This file is part of pygal
+from datetime import date, datetime
+from random import choice, randint
+
+from flask import abort
+
 from pygal import (
-    Bar, Gauge, Pyramid, Funnel, Dot, StackedBar, StackedLine, XY,
-    CHARTS_BY_NAME, Config, Line, Histogram, Box,
-    Pie, Treemap, TimeLine, DateLine, Radar, HorizontalBar,
-    DateTimeLine, SolidGauge)
+    CHARTS_BY_NAME, XY, Bar, Box, Config, DateLine, DateTimeLine, Dot, Funnel,
+    Gauge, Histogram, HorizontalBar, Line, Pie, Pyramid, Radar, SolidGauge,
+    StackedBar, StackedLine, TimeLine, Treemap, formatters, stats)
+from pygal.colors import rotate
+from pygal.graph.horizontal import HorizontalGraph
+from pygal.style import RotateStyle, Style, styles
 
 try:
     from pygal.maps import world
@@ -21,13 +28,6 @@ try:
 except ImportError:
     ch = None
 
-from flask import abort
-from pygal.style import styles, Style, RotateStyle
-from pygal.colors import rotate
-from pygal import stats, formatters
-from pygal.graph.horizontal import HorizontalGraph
-from random import randint, choice
-from datetime import datetime, date
 
 
 def get_test_routes(app):
diff --git a/docs/conf.py b/docs/conf.py
index e1e3c52..ba5128e 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -13,8 +13,9 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import sys
 import os
+import sys
+
 # import shlex
 
 # If extensions (or modules to document with autodoc) are in another directory,
diff --git a/docs/ext/pygal_sphinx_directives.py b/docs/ext/pygal_sphinx_directives.py
index 9b50b04..18efe8a 100644
--- a/docs/ext/pygal_sphinx_directives.py
+++ b/docs/ext/pygal_sphinx_directives.py
@@ -18,12 +18,13 @@
 # along with pygal. If not, see <http://www.gnu.org/licenses/>.
 
 
-from docutils.parsers.rst import Directive
 from traceback import format_exc, print_exc
-from sphinx.directives.code import CodeBlock
 
 import docutils.core
+from docutils.parsers.rst import Directive
+
 import pygal
+from sphinx.directives.code import CodeBlock
 
 # Patch default style
 
diff --git a/perf.py b/perf.py
index 693fc18..ec40037 100644
--- a/perf.py
+++ b/perf.py
@@ -18,14 +18,13 @@
 # along with pygal. If not, see <http://www.gnu.org/licenses/>.
 
 
-from pygal import CHARTS, CHARTS_BY_NAME
-from pygal.test import adapt
-from pygal.etree import etree
-from random import sample
-
-import timeit
 import sys
+import timeit
+from random import sample
 
+from pygal import CHARTS, CHARTS_BY_NAME
+from pygal.etree import etree
+from pygal.test import adapt
 
 sizes = (1, 5, 10, 50, 100, 500, 1000)
 
diff --git a/pygal/_compat.py b/pygal/_compat.py
index 54e61c7..5debb4b 100644
--- a/pygal/_compat.py
+++ b/pygal/_compat.py
@@ -16,14 +16,13 @@
 #
 # You should have received a copy of the GNU Lesser General Public License
 # along with pygal. If not, see <http://www.gnu.org/licenses/>.
-from __future__ import division
 """Various hacks for transparent python 2 / python 3 support"""
+from __future__ import division
 
 import sys
 from collections import Iterable
 from datetime import datetime, timedelta, tzinfo
 
-
 if sys.version_info[0] == 3:
     base = (str, bytes)
     coerce = str
diff --git a/pygal/adapters.py b/pygal/adapters.py
index 0d2a692..1a7bc0e 100644
--- a/pygal/adapters.py
+++ b/pygal/adapters.py
@@ -18,6 +18,7 @@
 # along with pygal. If not, see <http://www.gnu.org/licenses/>.
 """Value adapters to use when a chart doesn't accept all value types"""
 from decimal import Decimal
+
 from pygal._compat import is_str
 
 
diff --git a/pygal/config.py b/pygal/config.py
index e1e7ce1..9a6d2a3 100644
--- a/pygal/config.py
+++ b/pygal/config.py
@@ -20,10 +20,9 @@
 
 from copy import deepcopy
 
+from pygal import formatters
 from pygal.interpolate import INTERPOLATIONS
 from pygal.style import DefaultStyle, Style
-from pygal import formatters
-
 
 CONFIG_ITEMS = []
 callable = type(lambda: 1)
diff --git a/pygal/formatters.py b/pygal/formatters.py
index 601ed41..fe901b5 100644
--- a/pygal/formatters.py
+++ b/pygal/formatters.py
@@ -22,9 +22,10 @@ Formatters to use with `value_formatter` and `x_value_formatter` configs
 """
 from __future__ import division
 
-from datetime import datetime, date, time
+from datetime import date, datetime, time
 from math import floor, log
-from pygal._compat import u, to_str
+
+from pygal._compat import to_str, u
 from pygal.util import float_format
 
 
diff --git a/pygal/graph/graph.py b/pygal/graph/graph.py
index c6079f0..81e897e 100644
--- a/pygal/graph/graph.py
+++ b/pygal/graph/graph.py
@@ -22,14 +22,13 @@ from __future__ import division
 
 from math import ceil, cos, sin, sqrt
 
+from pygal import stats
 from pygal._compat import is_list_like, is_str, to_str
 from pygal.graph.public import PublicApi
 from pygal.interpolate import INTERPOLATIONS
-from pygal import stats
 from pygal.util import (
-    cached_property, compute_scale, cut, decorate,
-    get_text_box, get_texts_box, majorize, rad, reverse_text_len,
-    split_title, truncate, filter_kwargs)
+    cached_property, compute_scale, cut, decorate, filter_kwargs, get_text_box,
+    get_texts_box, majorize, rad, reverse_text_len, split_title, truncate)
 from pygal.view import LogView, ReverseView, View, XYLogView
 
 
diff --git a/pygal/graph/histogram.py b/pygal/graph/histogram.py
index 1467a54..979eff4 100644
--- a/pygal/graph/histogram.py
+++ b/pygal/graph/histogram.py
@@ -23,8 +23,8 @@ as bars of varying width.
 
 from __future__ import division
 
-from pygal.graph.dual import Dual
 from pygal.graph.bar import Bar
+from pygal.graph.dual import Dual
 from pygal.util import alter, cached_property, decorate
 
 
diff --git a/pygal/graph/horizontalline.py b/pygal/graph/horizontalline.py
index 097fcd5..e13039d 100644
--- a/pygal/graph/horizontalline.py
+++ b/pygal/graph/horizontalline.py
@@ -19,8 +19,8 @@
 
 """Horizontal line graph"""
 
-from pygal.graph.line import Line
 from pygal.graph.horizontal import HorizontalGraph
+from pygal.graph.line import Line
 
 
 class HorizontalLine(HorizontalGraph, Line):
diff --git a/pygal/graph/horizontalstackedline.py b/pygal/graph/horizontalstackedline.py
index 94d6de6..9748d81 100644
--- a/pygal/graph/horizontalstackedline.py
+++ b/pygal/graph/horizontalstackedline.py
@@ -19,8 +19,8 @@
 
 """Horizontal Stacked Line graph"""
 
-from pygal.graph.stackedline import StackedLine
 from pygal.graph.horizontal import HorizontalGraph
+from pygal.graph.stackedline import StackedLine
 
 
 class HorizontalStackedLine(HorizontalGraph, StackedLine):
diff --git a/pygal/graph/public.py b/pygal/graph/public.py
index eb6e43f..efb7872 100644
--- a/pygal/graph/public.py
+++ b/pygal/graph/public.py
@@ -21,7 +21,7 @@
 import base64
 import io
 
-from pygal._compat import is_list_like, u, _ellipsis
+from pygal._compat import _ellipsis, is_list_like, u
 from pygal.graph.base import BaseGraph
 
 
diff --git a/pygal/graph/radar.py b/pygal/graph/radar.py
index 279402e..588cf10 100644
--- a/pygal/graph/radar.py
+++ b/pygal/graph/radar.py
@@ -29,8 +29,7 @@ from math import cos, pi
 from pygal._compat import is_str
 from pygal.adapters import none_to_zero, positive
 from pygal.graph.line import Line
-from pygal.util import (
-    cached_property, compute_scale, cut, deg, truncate)
+from pygal.util import cached_property, compute_scale, cut, deg, truncate
 from pygal.view import PolarLogView, PolarView
 
 
diff --git a/pygal/graph/solidgauge.py b/pygal/graph/solidgauge.py
index ae673d6..4fc9189 100644
--- a/pygal/graph/solidgauge.py
+++ b/pygal/graph/solidgauge.py
@@ -24,7 +24,6 @@ For each series a solid guage is shown on the plot area.
 """
 from __future__ import division
 
-
 from math import pi, sqrt
 
 from pygal.graph.graph import Graph
diff --git a/pygal/stats.py b/pygal/stats.py
index 3b114ac..55d03b7 100644
--- a/pygal/stats.py
+++ b/pygal/stats.py
@@ -1,4 +1,4 @@
-from math import log, sqrt, pi
+from math import log, pi, sqrt
 
 
 def erfinv(x, a=.147):
diff --git a/pygal/svg.py b/pygal/svg.py
index 94bf23d..aa1bbe3 100644
--- a/pygal/svg.py
+++ b/pygal/svg.py
@@ -19,18 +19,20 @@
 """Svg helper"""
 
 from __future__ import division
-from pygal._compat import to_str, u, quote_plus
-from pygal.etree import etree
+
 import io
-import os
 import json
+import os
 from datetime import date, datetime
-from numbers import Number
 from math import pi
-from pygal.util import (
-    template, minify_css,
-    coord_project, coord_diff, coord_format, coord_dual, coord_abs_project)
+from numbers import Number
+
 from pygal import __version__
+from pygal._compat import quote_plus, to_str, u
+from pygal.etree import etree
+from pygal.util import (
+    coord_abs_project, coord_diff, coord_dual, coord_format, coord_project,
+    minify_css, template)
 
 nearly_2pi = 2 * pi - .00001
 
diff --git a/pygal/table.py b/pygal/table.py
index cc99316..5c51a13 100644
--- a/pygal/table.py
+++ b/pygal/table.py
@@ -23,6 +23,7 @@ This class is used to render an html table from a chart data.
 """
 
 import uuid
+
 from lxml.html import builder, tostring
 
 from pygal.util import template
diff --git a/pygal/test/conftest.py b/pygal/test/conftest.py
index 66d22eb..b8c8a59 100644
--- a/pygal/test/conftest.py
+++ b/pygal/test/conftest.py
@@ -19,10 +19,13 @@
 
 """pytest fixtures"""
 
+import sys
+
 import pytest
+
 import pygal
 from pygal.etree import etree
-import sys
+
 from . import get_data
 
 
diff --git a/pygal/test/test_colors.py b/pygal/test/test_colors.py
index 6ee2470..46af59c 100644
--- a/pygal/test/test_colors.py
+++ b/pygal/test/test_colors.py
@@ -22,8 +22,8 @@
 from __future__ import division
 
 from pygal.colors import (
-    parse_color, unparse_color,
-    rgb_to_hsl, hsl_to_rgb, darken, lighten, saturate, desaturate, rotate)
+    darken, desaturate, hsl_to_rgb, lighten, parse_color, rgb_to_hsl, rotate,
+    saturate, unparse_color)
 
 
 def test_parse_color():
diff --git a/pygal/test/test_config.py b/pygal/test/test_config.py
index aecb289..ec0e587 100644
--- a/pygal/test/test_config.py
+++ b/pygal/test/test_config.py
@@ -19,21 +19,18 @@
 
 """Various config options tested on one chart type or more"""
 
+from tempfile import NamedTemporaryFile
+
 from pygal import (
-    Line, Dot, Pie, Treemap, Radar, Config, Bar, Funnel,
-    Histogram, Gauge, Box, XY,
-    Pyramid, HorizontalBar, HorizontalStackedBar,
-    HorizontalStackedLine, HorizontalLine,
-    DateTimeLine, TimeLine, DateLine, TimeDeltaLine,
-    SolidGauge
-)
-from pygal.graph.map import BaseMap
-from pygal.graph.horizontal import HorizontalGraph
+    XY, Bar, Box, Config, DateLine, DateTimeLine, Dot, Funnel, Gauge,
+    Histogram, HorizontalBar, HorizontalLine, HorizontalStackedBar,
+    HorizontalStackedLine, Line, Pie, Pyramid, Radar, SolidGauge,
+    TimeDeltaLine, TimeLine, Treemap, formatters)
+from pygal._compat import _ellipsis, u
 from pygal.graph.dual import Dual
-from pygal import formatters
-from pygal._compat import u, _ellipsis
+from pygal.graph.horizontal import HorizontalGraph
+from pygal.graph.map import BaseMap
 from pygal.test.utils import texts
-from tempfile import NamedTemporaryFile
 
 
 def test_config_behaviours():
diff --git a/pygal/test/test_date.py b/pygal/test/test_date.py
index e58dd45..36882b9 100644
--- a/pygal/test/test_date.py
+++ b/pygal/test/test_date.py
@@ -19,10 +19,11 @@
 
 """Date related charts tests"""
 
-from pygal import DateLine, TimeLine, DateTimeLine, TimeDeltaLine
+from datetime import date, datetime, time, timedelta
+
+from pygal import DateLine, DateTimeLine, TimeDeltaLine, TimeLine
 from pygal._compat import timestamp, utc
 from pygal.test.utils import texts
-from datetime import datetime, date, time, timedelta
 
 
 def test_date():
diff --git a/pygal/test/test_graph.py b/pygal/test/test_graph.py
index 2122647..3ee99f1 100644
--- a/pygal/test/test_graph.py
+++ b/pygal/test/test_graph.py
@@ -19,16 +19,18 @@
 
 """Generate tests for different chart types with different data"""
 
+import io
 import os
-import pygal
-import uuid
 import sys
+import uuid
+
 import pytest
-import io
-from pygal.graph.map import BaseMap
-from pygal.util import cut
+
+import pygal
 from pygal._compat import u
+from pygal.graph.map import BaseMap
 from pygal.test import make_data
+from pygal.util import cut
 
 try:
     import cairosvg
diff --git a/pygal/test/test_line.py b/pygal/test/test_line.py
index 1cf68fd..c102232 100644
--- a/pygal/test/test_line.py
+++ b/pygal/test/test_line.py
@@ -20,9 +20,11 @@
 """Line chart related tests"""
 
 from __future__ import division
+
+from math import cos, sin
+
 from pygal import Line
 from pygal.test.utils import texts
-from math import cos, sin
 
 
 def test_simple_line():
diff --git a/pygal/test/test_maps.py b/pygal/test/test_maps.py
index a6eede0..e2a3c5f 100644
--- a/pygal/test/test_maps.py
+++ b/pygal/test/test_maps.py
@@ -21,7 +21,6 @@
 
 import pkg_resources
 
-
 # Load plugins tests
 for entry in pkg_resources.iter_entry_points('pygal.test.test_maps'):
     module = entry.load()
diff --git a/pygal/test/test_serie_config.py b/pygal/test/test_serie_config.py
index fa6b86b..f8072a2 100644
--- a/pygal/test/test_serie_config.py
+++ b/pygal/test/test_serie_config.py
@@ -21,7 +21,6 @@
 
 from pygal import Line
 
-
 s1 = [1, 3, 12, 3, 4]
 s2 = [7, -4, 10, None, 8, 3, 1]
 
diff --git a/pygal/test/test_sparktext.py b/pygal/test/test_sparktext.py
index 2e4e480..8066169 100644
--- a/pygal/test/test_sparktext.py
+++ b/pygal/test/test_sparktext.py
@@ -19,7 +19,7 @@
 
 """Test sparktext rendering"""
 
-from pygal import Line, Bar
+from pygal import Bar, Line
 from pygal._compat import u
 
 
diff --git a/pygal/test/test_style.py b/pygal/test/test_style.py
index b8c9b68..9fe0139 100644
--- a/pygal/test/test_style.py
+++ b/pygal/test/test_style.py
@@ -21,9 +21,8 @@
 
 from pygal import Line
 from pygal.style import (
-    LightStyle,
-    LightenStyle, DarkenStyle, SaturateStyle, DesaturateStyle, RotateStyle
-)
+    DarkenStyle, DesaturateStyle, LightenStyle, LightStyle, RotateStyle,
+    SaturateStyle)
 
 STYLES = LightenStyle, DarkenStyle, SaturateStyle, DesaturateStyle, RotateStyle
 
diff --git a/pygal/test/test_util.py b/pygal/test/test_util.py
index a233d82..0925b1e 100644
--- a/pygal/test/test_util.py
+++ b/pygal/test/test_util.py
@@ -19,13 +19,15 @@
 
 """Utility functions tests"""
 
-from pygal._compat import u, _ellipsis
-from pygal.util import (
-    round_to_int, round_to_float, _swap_curly, template,
-    truncate, minify_css, majorize, mergextend)
-from pytest import raises
 import sys
 
+from pytest import raises
+
+from pygal._compat import _ellipsis, u
+from pygal.util import (
+    _swap_curly, majorize, mergextend, minify_css, round_to_float,
+    round_to_int, template, truncate)
+
 
 def test_round_to_int():
     """Test round to int function"""
diff --git a/pygal/util.py b/pygal/util.py
index 0519051..4d284a8 100644
--- a/pygal/util.py
+++ b/pygal/util.py
@@ -23,10 +23,9 @@ from __future__ import division
 
 import re
 from decimal import Decimal
+from math import ceil, cos, floor, log10, pi, sin
 
-from math import ceil, floor, log10, pi, cos, sin
-
-from pygal._compat import to_unicode, u, _ellipsis
+from pygal._compat import _ellipsis, to_unicode, u
 
 
 def float_format(number):
diff --git a/pygal_gen.py b/pygal_gen.py
index faab91e..98e0d4b 100755
--- a/pygal_gen.py
+++ b/pygal_gen.py
@@ -18,6 +18,7 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with pygal. If not, see <http://www.gnu.org/licenses/>.
 import argparse
+
 import pygal
 
 parser = argparse.ArgumentParser(