update code style:

* remove shebangs
* remove "codeing: utf-8"
* remove "object" in class
* use more f-strings
* IOError -> OSError
* cleanup "super()" calls

38 files changed, 65 insertions, 121 deletions

diff --git a/creole/__init__.py b/creole/__init__.py
index 33d99fd..d009039 100644
--- a/creole/__init__.py
+++ b/creole/__init__.py
@@ -1,4 +1,3 @@
-
 """
     python-creole
     ~~~~~~~~~~~~~
diff --git a/creole/cmdline.py b/creole/cmdline.py
index 3fcdfe6..16ecb4e 100644
--- a/creole/cmdline.py
+++ b/creole/cmdline.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+
 
 """
     python-creole commandline interface
@@ -15,7 +15,7 @@ import codecs
 from creole import VERSION_STRING, creole2html, html2creole, html2rest, html2textile
 
 
-class CreoleCLI(object):
+class CreoleCLI:
     def __init__(self, convert_func):
         self.convert_func = convert_func
         self.parser = argparse.ArgumentParser(
diff --git a/creole/emitter/creol2html_emitter.py b/creole/emitter/creol2html_emitter.py
index f946c88..61e2e55 100644
--- a/creole/emitter/creol2html_emitter.py
+++ b/creole/emitter/creol2html_emitter.py
@@ -1,4 +1,3 @@
-
 """
     WikiCreole to HTML converter
 
@@ -16,7 +15,7 @@ from creole.parser.creol2html_parser import CreoleParser
 from creole.shared.utils import string2dict
 
 
-class TableOfContent(object):
+class TableOfContent:
     def __init__(self):
         self.max_depth = None
         self.headlines = []
@@ -91,7 +90,7 @@ class TableOfContent(object):
         return document
 
 
-class HtmlEmitter(object):
+class HtmlEmitter:
     """
     Generate HTML output for the document
     tree consisting of DocNodes.
@@ -212,10 +211,10 @@ class HtmlEmitter(object):
     # --------------------------------------------------------------------------
 
     def _typeface(self, node, tag):
-        return '<%(tag)s>%(data)s</%(tag)s>' % {
-            "tag": tag,
-            "data": self.emit_children(node),
-        }
+        return '<{tag}>{data}</{tag}>'.format(
+            tag=tag,
+            data=self.emit_children(node),
+        )
 
     # TODO: How can we generalize that:
     def emphasis_emit(self, node):
@@ -278,7 +277,7 @@ class HtmlEmitter(object):
                     w_str, h_str = size_str.split("x", 1)
                     width = int(w_str.strip())
                     height = int(h_str.strip())
-                    return '<img src="%s" title="%s" alt="%s" width="%s" height="%s" />' % (
+                    return '<img src="{}" title="{}" alt="{}" width="{}" height="{}" />'.format(
                         self.attr_escape(target), title, title, width, height)
             except BaseException:
                 pass
@@ -339,7 +338,7 @@ class HtmlEmitter(object):
                 else:
                     try:
                         sourceline = inspect.getsourcelines(macro)[0][0].strip()
-                    except IOError as err:
+                    except OSError as err:
                         evalue = etype(f"{evalue} (error getting sourceline: {err} from {filename})")
                     else:
                         evalue = etype(f"{evalue} (sourceline: {sourceline!r} from {filename})")
diff --git a/creole/emitter/html2creole_emitter.py b/creole/emitter/html2creole_emitter.py
index 7c6421e..ceac4fd 100644
--- a/creole/emitter/html2creole_emitter.py
+++ b/creole/emitter/html2creole_emitter.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+
 
 """
     html -> creole Emitter
@@ -24,7 +23,7 @@ class CreoleEmitter(BaseEmitter):
 
     def __init__(self, document_tree, strict=False, *args, **kwargs):
         self.strict = strict
-        super(CreoleEmitter, self).__init__(document_tree, *args, **kwargs)
+        super().__init__(document_tree, *args, **kwargs)
 
         self.table_head_prefix = "= "
         self.table_auto_width = True
@@ -62,7 +61,7 @@ class CreoleEmitter(BaseEmitter):
             return "\n"
 
     def headline_emit(self, node):
-        return "%s %s\n\n" % ("=" * node.level, self.emit_children(node))
+        return f"{'=' * node.level} {self.emit_children(node)}\n\n"
 
     # --------------------------------------------------------------------------
 
@@ -131,9 +130,9 @@ class CreoleEmitter(BaseEmitter):
 
         if not self.strict:
             if width and height:
-                return "{{%s|%s|%sx%s}}" % (src, text, width, height)
+                return f"{{{{{src}|{text}|{width}x{height}}}}}"
 
-        return "{{%s|%s}}" % (src, text)
+        return f"{{{{{src}|{text}}}}}"
 
     # --------------------------------------------------------------------------
 
diff --git a/creole/emitter/html2rest_emitter.py b/creole/emitter/html2rest_emitter.py
index f8e2322..e45210c 100644
--- a/creole/emitter/html2rest_emitter.py
+++ b/creole/emitter/html2rest_emitter.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+
 
 """
     html -> reStructuredText Emitter
@@ -35,7 +34,7 @@ class ReStructuredTextEmitter(BaseEmitter):
     """
 
     def __init__(self, *args, **kwargs):
-        super(ReStructuredTextEmitter, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
         self.table_head_prefix = "_. "
         self.table_auto_width = False
@@ -97,7 +96,7 @@ class ReStructuredTextEmitter(BaseEmitter):
         if self._substitution_data and node.parent == self.root:
             result += "%s\n\n" % self._get_block_data()
 
-        result += super(ReStructuredTextEmitter, self).emit_node(node)
+        result += super().emit_node(node)
         return result
 
     def p_emit(self, node):
@@ -262,9 +261,7 @@ class ReStructuredTextEmitter(BaseEmitter):
 
     def li_emit(self, node):
         content = self.emit_children(node).strip("\n")
-        result = "\n%s%s %s\n" % (
-            "    " * (node.level - 1), self._list_markup, content
-        )
+        result = f"\n{'    ' * (node.level - 1)}{self._list_markup} {content}\n"
         return result
 
     def _list_emit(self, node, list_type):
diff --git a/creole/emitter/html2textile_emitter.py b/creole/emitter/html2textile_emitter.py
index 3cbbd02..785ed17 100644
--- a/creole/emitter/html2textile_emitter.py
+++ b/creole/emitter/html2textile_emitter.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+
 
 """
     html -> textile Emitter
@@ -23,7 +22,7 @@ class TextileEmitter(BaseEmitter):
     """
 
     def __init__(self, *args, **kwargs):
-        super(TextileEmitter, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
         self.table_head_prefix = "_. "
         self.table_auto_width = False
diff --git a/creole/exceptions.py b/creole/exceptions.py
index d52e6b4..826ddbd 100644
--- a/creole/exceptions.py
+++ b/creole/exceptions.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+
 
 """
     python-creole exceptions
diff --git a/creole/html_tools/deentity.py b/creole/html_tools/deentity.py
index 165a7af..16a7dfa 100644
--- a/creole/html_tools/deentity.py
+++ b/creole/html_tools/deentity.py
@@ -1,4 +1,3 @@
-
 """
     python-creole utils
     ~~~~~~~~~~~~~~~~~~~
@@ -24,7 +23,7 @@ entities_regex = re.compile(
 )
 
 
-class Deentity(object):
+class Deentity:
     """
     replace html entity
 
diff --git a/creole/html_tools/strip_html.py b/creole/html_tools/strip_html.py
index c265099..be3d37e 100644
--- a/creole/html_tools/strip_html.py
+++ b/creole/html_tools/strip_html.py
@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-# coding: utf-8
 
 
 """
diff --git a/creole/html_tools/text_tools.py b/creole/html_tools/text_tools.py
index 5b52719..c08b392 100644
--- a/creole/html_tools/text_tools.py
+++ b/creole/html_tools/text_tools.py
@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-# coding: utf-8
 
 
 """
diff --git a/creole/parser/creol2html_parser.py b/creole/parser/creol2html_parser.py
index ff440e2..3cb0c19 100644
--- a/creole/parser/creol2html_parser.py
+++ b/creole/parser/creol2html_parser.py
@@ -26,7 +26,7 @@ from creole.parser.creol2html_rules import INLINE_FLAGS, INLINE_RULES, BlockRule
 from creole.shared.document_tree import DocNode
 
 
-class CreoleParser(object):
+class CreoleParser:
     """
     Parse the raw text and create a document object
     that can be converted into output using Emitter.
@@ -473,7 +473,7 @@ class CreoleParser(object):
 
         def emit(node, ident=0):
             for child in node.children:
-                print("%s%s: %r" % (" " * ident, child.kind, child.content))
+                print(f"{' ' * ident}{child.kind}: {child.content!r}")
                 emit(child, ident + 4)
         emit(start_node)
         print("*" * 80)
@@ -483,7 +483,7 @@ class CreoleParser(object):
         print("  debug groups:")
         for name, text in groups.items():
             if text is not None:
-                print("%15s: %r" % (name, text))
+                print(f"{name:>15}: {text!r}")
         print("-" * 80)
 
 
@@ -508,7 +508,7 @@ if __name__ == "__main__":
         groups = match.groupdict()
         for name, text in groups.items():
             if name != "char" and text is not None:
-                print("%20s: %r" % (name, text))
+                print(f"{name:>20}: {text!r}")
 
     parser = CreoleParser("", blog_line_breaks=blog_line_breaks)
 
diff --git a/creole/parser/creol2html_rules.py b/creole/parser/creol2html_rules.py
index 4cb1e2a..07754c9 100644
--- a/creole/parser/creol2html_rules.py
+++ b/creole/parser/creol2html_rules.py
@@ -1,6 +1,3 @@
-# coding: utf-8
-
-
 """
     Creole Rules for parser
     ~~~~~~~~~~~~~~~~~~~~~~~
@@ -13,7 +10,7 @@
 import re
 
 
-class InlineRules(object):
+class InlineRules:
     """
     All inline rules
     """
@@ -97,7 +94,7 @@ class InlineRules(object):
     char = r'(?P<char> . )'
 
 
-class BlockRules(object):
+class BlockRules:
     """
     All used block rules.
     """
@@ -169,7 +166,7 @@ class BlockRules(object):
         )
 
 
-class SpecialRules(object):
+class SpecialRules:
     """
     re rules witch not directly used as inline/block rules.
     """
diff --git a/creole/parser/html_parser.py b/creole/parser/html_parser.py
index b8c3cee..d789a97 100644
--- a/creole/parser/html_parser.py
+++ b/creole/parser/html_parser.py
@@ -1,4 +1,3 @@
-
 """
     python-creole
     ~~~~~~~~~~~~~
@@ -77,7 +76,7 @@ class HtmlParser(HTMLParser):
     _inline_placeholder = "inlinedata"
 
     def __init__(self, debug=False):
-        super(HtmlParser, self).__init__(convert_charrefs=False)
+        super().__init__(convert_charrefs=False)
 
         self.debugging = debug
         if self.debugging:
@@ -120,7 +119,7 @@ class HtmlParser(HTMLParser):
         for name, text in groups.items():
             if text is not None:
                 if self.debugging:
-                    print("%15s: %r (%r)" % (name, text, match.group(0)))
+                    print(f"{name:>15}: {text!r} ({match.group(0)!r})")
                 method = getattr(self, f'_pre_{name}_cut')
                 return method(groups)
 
@@ -251,7 +250,7 @@ class HtmlParser(HTMLParser):
     def debug_msg(self, method, txt):
         if not self.debugging:
             return
-        print("%-8s %8s: %s" % (self.getpos(), method, txt))
+        print(f"{str(self.getpos()):<8} {method:>8}: {txt}")
 
     def debug(self, start_node=None):
         """
@@ -269,7 +268,7 @@ class HtmlParser(HTMLParser):
 
         def emit(node, ident=0):
             for child in node.children:
-                txt = "%s%s" % (" " * ident, child.kind)
+                txt = f"{' ' * ident}{child.kind}"
 
                 if child.content:
                     txt += f": {child.content!r}"
diff --git a/creole/parser/html_parser_config.py b/creole/parser/html_parser_config.py
index 679db4c..38557ed 100644
--- a/creole/parser/html_parser_config.py
+++ b/creole/parser/html_parser_config.py
@@ -1,6 +1,3 @@
-# coding: utf-8
-
-
 """
     python-creole
     ~~~~~~~~~~~~~
diff --git a/creole/rest_tools/clean_writer.py b/creole/rest_tools/clean_writer.py
index 524c8d6..e8c224b 100644
--- a/creole/rest_tools/clean_writer.py
+++ b/creole/rest_tools/clean_writer.py
@@ -59,7 +59,7 @@ class CleanHTMLWriter(html4css1.Writer):
         self.translator_class = CleanHTMLTranslator
 
 
-class CleanHTMLTranslator(html4css1.HTMLTranslator, object):
+class CleanHTMLTranslator(html4css1.HTMLTranslator):
     """
     Clean html translator for docutils system.
     """
@@ -97,15 +97,18 @@ class CleanHTMLTranslator(html4css1.HTMLTranslator, object):
             parts.append(part)
 
         if DEBUG:
-            print("Tag %r - ids: %r - attributes: %r - parts: %r" % (
-                tagname, getattr(node, "ids", "-"), attributes, parts
-            ))
+            print(
+                f'Tag {tagname!r}'
+                f' - ids: {getattr(node, "ids", "-")!r}'
+                f' - attributes: {attributes!r}'
+                f' - parts: {parts!r}'
+            )
 
         if empty:
             infix = ' /'
         else:
             infix = ''
-        html = '<%s%s>%s' % (' '.join(parts), infix, suffix)
+        html = f"<{' '.join(parts)}{infix}>{suffix}"
         if DEBUG:
             print(f"startag html: {html!r}")
         return html
@@ -148,7 +151,7 @@ class CleanHTMLTranslator(html4css1.HTMLTranslator, object):
         node.stubs = []
 
     def visit_field_list(self, node):
-        super(CleanHTMLTranslator, self).visit_field_list(node)
+        super().visit_field_list(node)
         if "<col" in self.body[-1]:
             del(self.body[-1])
 
@@ -168,7 +171,7 @@ class CleanHTMLTranslator(html4css1.HTMLTranslator, object):
     depart_figure = _do_nothing
 
     def visit_image(self, node):
-        super(CleanHTMLTranslator, self).visit_image(node)
+        super().visit_image(node)
         if self.body[-1].startswith('<img'):
             align = None
 
diff --git a/creole/rest_tools/pypi_rest2html.py b/creole/rest_tools/pypi_rest2html.py
index bacdf7f..50b2d54 100644
--- a/creole/rest_tools/pypi_rest2html.py
+++ b/creole/rest_tools/pypi_rest2html.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+
 
 """
     Try to be so strict as PyPi.
diff --git a/creole/shared/base_emitter.py b/creole/shared/base_emitter.py
index d0c98f1..a6e2819 100644
--- a/creole/shared/base_emitter.py
+++ b/creole/shared/base_emitter.py
@@ -1,4 +1,3 @@
-
 """
     Base document tree emitter
     ~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -15,7 +14,7 @@ from creole.shared.markup_table import MarkupTable
 from creole.shared.unknown_tags import transparent_unknown_nodes
 
 
-class BaseEmitter(object):
+class BaseEmitter:
     """
     Build from a document_tree (html2creole.parser.HtmlParser instance) a
     creole markup text.
@@ -236,4 +235,4 @@ class BaseEmitter(object):
     def debug_msg(self, method, txt):
         if not self.debugging:
             return
-        print("%13s: %s" % (method, txt))
+        print(f"{method:>13}: {txt}")
diff --git a/creole/shared/document_tree.py b/creole/shared/document_tree.py
index 20c6a44..fdcc863 100644
--- a/creole/shared/document_tree.py
+++ b/creole/shared/document_tree.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+
 
 """
     python-creole
@@ -83,13 +82,13 @@ class DocNode:
                 continue
             if callable(getattr(self, i)):
                 continue
-            print("%20s: %r" % (i, getattr(self, i, "---")))
+            print(f"{i:>20}: {getattr(self, i, '---')!r}")
 
 
 class DebugList(list):
     def __init__(self, html2creole):
         self.html2creole = html2creole
-        super(DebugList, self).__init__()
+        super().__init__()
 
     def append(self, item):
         #        for stack_frame in inspect.stack(): print(stack_frame)
diff --git a/creole/shared/example_macros.py b/creole/shared/example_macros.py
index 88a9bc8..78f317c 100644
--- a/creole/shared/example_macros.py
+++ b/creole/shared/example_macros.py
@@ -1,6 +1,3 @@
-# coding: utf-8
-
-
 """
     Creole macros
     ~~~~~~~~~~~~~
diff --git a/creole/shared/markup_table.py b/creole/shared/markup_table.py
index acb9b21..dd26374 100644
--- a/creole/shared/markup_table.py
+++ b/creole/shared/markup_table.py
@@ -1,5 +1,4 @@
-
-class MarkupTable(object):
+class MarkupTable:
     """
     Container for holding table data and render the data in creole markup.
     Format every cell width to the same col width.
diff --git a/creole/shared/unknown_tags.py b/creole/shared/unknown_tags.py
index 26cfd3a..8d36ad0 100644
--- a/creole/shared/unknown_tags.py
+++ b/creole/shared/unknown_tags.py
@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-# coding: utf-8
 
 
 """
diff --git a/creole/shared/utils.py b/creole/shared/utils.py
index 1d0071f..9c8ffc8 100644
--- a/creole/shared/utils.py
+++ b/creole/shared/utils.py
@@ -1,6 +1,3 @@
-# coding: utf-8
-
-
 """
     python creole utilities
     ~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/creole/tests/test_Makefile.py b/creole/tests/test_Makefile.py
index dbf129c..412be65 100644
--- a/creole/tests/test_Makefile.py
+++ b/creole/tests/test_Makefile.py
@@ -1,4 +1,3 @@
-
 """
     :copyleft: 2020 by python-creole team, see AUTHORS for more details.
     :license: GNU GPL v3 or above, see LICENSE for more details.
diff --git a/creole/tests/test_TODOs.py b/creole/tests/test_TODOs.py
index a2b75c9..c114089 100644
--- a/creole/tests/test_TODOs.py
+++ b/creole/tests/test_TODOs.py
@@ -1,5 +1,3 @@
-# coding: utf-8
-
 """
     Unittest which failed, cause bugfixes not implemented, yet.
 """
diff --git a/creole/tests/test_cli.py b/creole/tests/test_cli.py
index ffd48ac..76d8050 100644
--- a/creole/tests/test_cli.py
+++ b/creole/tests/test_cli.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+
 
 """
     unittest for CLI
@@ -22,7 +21,7 @@ from creole.tests.utils.unittest_subprocess import SubprocessMixin
 CMDS = ("creole2html", "html2creole", "html2rest", "html2textile")
 
 
-class CliTestMixins(object):
+class CliTestMixins:
     def test_creole2html(self):
         self._test_convert(
             source_content=b"= test creole2html =",
@@ -101,7 +100,7 @@ class CreoleCLITests(BaseCreoleTest, SubprocessMixin, CliTestMixins):
 class CreoleCLITestsDirect(BaseCreoleTest, CliTestMixins):
 
     def setUp(self):
-        super(CreoleCLITestsDirect, self).setUp()
+        super().setUp()
         self._old_sys_argv = sys.argv[:]
 
     def tearDown(self):
diff --git a/creole/tests/test_creole2html.py b/creole/tests/test_creole2html.py
index d938a38..d129848 100644
--- a/creole/tests/test_creole2html.py
+++ b/creole/tests/test_creole2html.py
@@ -1,4 +1,3 @@
-
 """
     creole2html unittest
     ~~~~~~~~~~~~~~~~~~~~
diff --git a/creole/tests/test_cross_compare_all.py b/creole/tests/test_cross_compare_all.py
index c069fa9..c09b550 100644
--- a/creole/tests/test_cross_compare_all.py
+++ b/creole/tests/test_cross_compare_all.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+
 
 """
     cross compare unittest
diff --git a/creole/tests/test_cross_compare_creole.py b/creole/tests/test_cross_compare_creole.py
index 7c4d893..fe71397 100644
--- a/creole/tests/test_cross_compare_creole.py
+++ b/creole/tests/test_cross_compare_creole.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+
 
 """
     cross compare creole unittest
diff --git a/creole/tests/test_cross_compare_rest.py b/creole/tests/test_cross_compare_rest.py
index ea02e19..a475e06 100644
--- a/creole/tests/test_cross_compare_rest.py
+++ b/creole/tests/test_cross_compare_rest.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+
 
 """
     cross compare reStructuredText unittest
diff --git a/creole/tests/test_cross_compare_textile.py b/creole/tests/test_cross_compare_textile.py
index 63ce6c7..b387806 100644
--- a/creole/tests/test_cross_compare_textile.py
+++ b/creole/tests/test_cross_compare_textile.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+
 
 """
     cross compare textile unittest
diff --git a/creole/tests/test_html2creole.py b/creole/tests/test_html2creole.py
index 2895b78..7cbad0d 100644
--- a/creole/tests/test_html2creole.py
+++ b/creole/tests/test_html2creole.py
@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-# coding: utf-8
 
 
 """
diff --git a/creole/tests/test_html2rest.py b/creole/tests/test_html2rest.py
index a10ae2a..13ac4ee 100644
--- a/creole/tests/test_html2rest.py
+++ b/creole/tests/test_html2rest.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+
 
 """
     html2rest unittest
diff --git a/creole/tests/test_html2textile.py b/creole/tests/test_html2textile.py
index cd03b88..318eca6 100644
--- a/creole/tests/test_html2textile.py
+++ b/creole/tests/test_html2textile.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+
 
 """
     html2textile unittest
diff --git a/creole/tests/test_macros.py b/creole/tests/test_macros.py
index c596a81..1a69b36 100644
--- a/creole/tests/test_macros.py
+++ b/creole/tests/test_macros.py
@@ -1,13 +1,10 @@
-# coding: utf-8
-
-
 """
     Creole unittest macros
     ~~~~~~~~~~~~~~~~~~~~~~
 
     Note: all mecro functions must return unicode!
 
-    :copyleft: 2008-2011 by python-creole team, see AUTHORS for more details.
+    :copyleft: 2008-2020 by python-creole team, see AUTHORS for more details.
     :license: GNU GPL v3 or above, see LICENSE for more details.
 """
 
@@ -26,7 +23,7 @@ def unittest_macro1(**kwargs):
     >>> unittest_macro1(a=1,b=2)
     '[test macro1 - kwargs: a=1,b=2]'
     """
-    kwargs = ','.join(['%s=%s' % (k, json.dumps(v)) for k, v in sorted(kwargs.items())])
+    kwargs = ','.join('{}={}'.format(k, json.dumps(v)) for k, v in sorted(kwargs.items()))
     return f"[test macro1 - kwargs: {kwargs}]"
 
 
@@ -36,8 +33,3 @@ def unittest_macro2(char, text):
     'a|b'
     """
     return char.join(text.split())
-
-
-if __name__ == '__main__':
-    import doctest
-    print(doctest.testmod())
diff --git a/creole/tests/test_rest2html.py b/creole/tests/test_rest2html.py
index dee787c..a5f08c1 100644
--- a/creole/tests/test_rest2html.py
+++ b/creole/tests/test_rest2html.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+
 
 """
     rest2html unittest
diff --git a/creole/tests/test_subprocess.py b/creole/tests/test_subprocess.py
index 4a8b02e..c99b05d 100644
--- a/creole/tests/test_subprocess.py
+++ b/creole/tests/test_subprocess.py
@@ -1,5 +1,3 @@
-# coding: utf-8
-
 """
     unittest
     ~~~~~~~~
diff --git a/creole/tests/test_utils.py b/creole/tests/test_utils.py
index 5131a16..c310aa1 100644
--- a/creole/tests/test_utils.py
+++ b/creole/tests/test_utils.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+
 
 """
     unittest for some utils
diff --git a/demo.py b/demo.py
index 962d3c8..19eae90 100644
--- a/demo.py
+++ b/demo.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+#!/usr/bin/env python3
 
 
 """
@@ -7,7 +6,6 @@
     ~~~~~~~~~~~
 """
 
-from __future__ import division, absolute_import, print_function, unicode_literals
 
 from creole import creole2html, html2creole, html2rest, html2textile