From aac48c58173a580d2b40d74b33be3b0b7f1a4cd6 Mon Sep 17 00:00:00 2001
From: Semyon Pupkov <mail@semyonpupkov.com>
Date: Thu, 7 Sep 2023 10:55:39 +0500
Subject: [PATCH] Make dnspython package is optional

---
 README.md                         | 6 ++++++
 email_validator/deliverability.py | 7 +++++--
 setup.cfg                         | 5 ++++-
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 72b3b0f..df8f2af 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,12 @@ This package [is on PyPI](https://pypi.org/project/email-validator/), so:
 pip install email-validator
 ```
 
+If deliverability option will be used:
+
+```sh
+pip install email-validator[dns]
+```
+
 (You might need to use `pip3` depending on your local environment.)
 
 Quick Start
diff --git a/email_validator/deliverability.py b/email_validator/deliverability.py
index 4846091..a66e2ee 100644
--- a/email_validator/deliverability.py
+++ b/email_validator/deliverability.py
@@ -2,8 +2,11 @@
 
 from .exceptions_types import EmailUndeliverableError
 
-import dns.resolver
-import dns.exception
+try:
+    import dns.resolver
+    import dns.exception
+except ImportError as e:
+    raise ImportError('deliverability option requires dnspython, run `pip install email-validator[dns]`') from e
 
 
 def caching_resolver(*, timeout: Optional[int] = None, cache=None):
diff --git a/setup.cfg b/setup.cfg
index dc97892..4974e72 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -25,10 +25,13 @@ keywords = email address validator
 [options]
 packages = find:
 install_requires =
-    dnspython>=2.0.0 # optional if deliverability check isn't needed
     idna>=2.0.0
 python_requires = >=3.7
 
+[options.extras_require]
+# optional if deliverability check isn't needed
+dns = dnspython>=2.0.0
+
 [options.package_data]
 * = py.typed