diff --git a/edocument.py b/edocument.py
index 26f2a9d..2dcfd1d 100644
--- a/edocument.py
+++ b/edocument.py
@@ -49,7 +49,7 @@ class Invoice(Invoice):
 
         if self.invoice.comment:
             notes.extend(self.invoice.comment.split('\n'))
-        if len(notes) > 0:
+        if notes:
             return '; '.join(notes)
 
     def invoice_line_tax(self, line):
@@ -75,10 +75,7 @@ class Invoice(Invoice):
     def taxident_data(self, tax_identifier):
         """ get tax-scheme-id and codes
         """
-        result = {
-            'code': None,
-            'id': None,
-            }
+        result = {'code': None, 'id': None}
 
         if tax_identifier:
             if tax_identifier.type == 'de_vat':
@@ -120,7 +117,7 @@ class Invoice(Invoice):
     def quote_text(self, text):
         """ replace critical chars
         """
-        if text is not None:
+        if text:
             return html.quote(text)
 
     def _get_template(self, version):
diff --git a/party.py b/party.py
index 037bae9..d35599b 100644
--- a/party.py
+++ b/party.py
@@ -31,7 +31,6 @@ class PartyConfiguration(metaclass=PoolMeta):
     def __setup__(cls):
         super(PartyConfiguration, cls).__setup__()
         cls.identifier_types.selection.append(
-                ('edoc_route_id', 'X-Rechnung Route-ID')
-            )
+                ('edoc_route_id', 'X-Rechnung Route-ID'))
 
 # end Configuration
diff --git a/setup.py b/setup.py
index 1ad91b6..e5e8e8a 100644
--- a/setup.py
+++ b/setup.py
@@ -4,14 +4,10 @@
 # full copyright notices and license terms.
 
 from setuptools import setup
-# To use a consistent encoding
 from codecs import open
 from os import path
 import re
-try:
-    from configparser import ConfigParser
-except ImportError:
-    from ConfigParser import ConfigParser
+from configparser import ConfigParser
 
 here = path.abspath(path.dirname(__file__))
 MODULE = 'edocument_xrechnung'
@@ -88,9 +84,9 @@ setup(
         'Natural Language :: English',
         'Operating System :: OS Independent',
         'License :: OSI Approved :: GNU General Public License (GPL)',
-        'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
     ],
 
     keywords='tryton xrechnung edcoument',