Warn Python 3.5 support is deprecated and will be removed in pip 21.0, Jan 2021

3 files changed, 16 insertions, 3 deletions

diff --git a/news/8181.removal b/news/8181.removal
new file mode 100644
index 000000000..ae6bbe9f8
--- /dev/null
+++ b/news/8181.removal
@@ -0,0 +1 @@
+Deprecate support for Python 3.5
diff --git a/src/pip/_internal/cli/base_command.py b/src/pip/_internal/cli/base_command.py
index c3b6a856b..197400a72 100644
--- a/src/pip/_internal/cli/base_command.py
+++ b/src/pip/_internal/cli/base_command.py
@@ -158,7 +158,19 @@ class Command(CommandContextMixIn):
                     "1st, 2020. Please upgrade your Python as Python 2.7 "
                     "is no longer maintained. "
                 ) + message
-            deprecated(message, replacement=None, gone_in=None)
+            deprecated(message, replacement=None, gone_in="21.0")
+
+        if (
+            sys.version_info[:2] == (3, 5) and
+            not options.no_python_version_warning
+        ):
+            message = (
+                "Python 3.5 reached the end of its life on September "
+                "13th, 2020. Please upgrade your Python as Python 3.5 "
+                "is no longer maintained. pip 21.0 will drop support "
+                "for Python 3.5 in January 2021."
+            )
+            deprecated(message, replacement=None, gone_in="21.0")
 
         # TODO: Try to get these passing down from the command?
         #       without resorting to os.environ to hold these.
diff --git a/tests/conftest.py b/tests/conftest.py
index 2aab50207..32b6e6926 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -470,8 +470,8 @@ def in_memory_pip():
 
 @pytest.fixture(scope="session")
 def deprecated_python():
-    """Used to indicate whether pip deprecated this python version"""
-    return sys.version_info[:2] in [(2, 7)]
+    """Used to indicate whether pip deprecated this Python version"""
+    return sys.version_info[:2] in [(2, 7), (3, 5)]
 
 
 @pytest.fixture(scope="session")