Release 1.0.8, fixes #98

CHANGELOG.txt

@@ -1,3 +1,6 @@
+1.0.8:
+- Fix backward compatibility for python<=3.7: https://gitea.ksol.io/karolyi/py3-validate-email/issues/98
+
 1.0.7:
 - Handle STARTTLS timeouts: https://gitea.ksol.io/karolyi/py3-validate-email/issues/95
 

setup.py

@@ -57,9 +57,11 @@ class BuildPyCommand(build_py):
 
 setup(
     name='py3-validate-email',
-    version='1.0.7',
+    version='1.0.8',
     packages=find_packages(exclude=['tests']),
-    install_requires=['dnspython~=2.2', 'idna~=3.3', 'filelock~=3.7'],
+    install_requires=[
+        'dnspython~=2.2', 'idna~=3.3', 'filelock~=3.7',
+        'typing_extensions~=4.4'],
     author='László Károlyi',
     author_email='laszlo@karolyi.hu',
     description=(

validate_email/dns_check.py

@@ -1,8 +1,8 @@
 from datetime import datetime
 from ipaddress import IPv4Address, IPv6Address, ip_address
 from logging import getLogger
-from typing import List, Literal, FrozenSet, Union, Type
 from socket import has_ipv6
+from typing import FrozenSet, List, Type, Union
 
 from dns.exception import DNSException, Timeout
 from dns.rdataclass import IN as rdcl_in
@@ -12,6 +12,7 @@ from dns.rdatatype import A as rdtype_a
 from dns.rdtypes.ANY.MX import MX as restype_mx
 from dns.resolver import (
     NXDOMAIN, YXDOMAIN, Answer, NoAnswer, NoNameservers, resolve)
+from typing_extensions import Literal
 
 from .constants import HOST_REGEX
 from .email_address import EmailAddress