Add an exception at install for python < 3.6.2 (#5171)

* Add an exception for python < 3.6.2

See https://github.com/PyCQA/pylint/issues/5065 for reasoning

Co-authored-by: Marc Mueller <30130371+cdce8p@users.noreply.github.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/setup.py b/setup.py
index 606849326..a6ee6b4aa 100644
--- a/setup.py
+++ b/setup.py
@@ -1,3 +1,20 @@
+import sys
+
 from setuptools import setup
 
+
+class PylintIncompatiblePythonError(Exception):
+    def __init__(self) -> None:
+        super().__init__(
+            "The last version compatible with Python <= 3.6.2 is pylint '2.9.3'. "
+            f"You're using {'.'.join([str(v) for v in sys.version_info[:3]])}. "
+            "Please install pylint 2.9.3 explicitly or upgrade your python interpreter "
+            "to at least 3.6.2. Remember that Python 3.6 end life is December 2021. "
+            "See https://github.com/PyCQA/pylint/issues/5065 for more detail."
+        )
+
+
+if sys.version_info < (3, 6, 2):
+    raise PylintIncompatiblePythonError()
+
 setup()