optional pickleshare (#14217)

Carreau · web-flow · commit 1a05e90960d3 · 2023-10-27T12:11:05.000+02:00
diff --git a/IPython/core/interactiveshell.py b/IPython/core/interactiveshell.py
@@ -37,7 +37,28 @@
 from typing import Optional, Sequence, Tuple
 from warnings import warn
 
-from pickleshare import PickleShareDB
+try:
+    from pickleshare import PickleShareDB
+except ModuleNotFoundError:
+
+    class PickleShareDB:  # type: ignore [no-redef]
+        def __init__(self, path):
+            pass
+
+        def get(self, key, default):
+            warn(
+                f"using {key} requires you to install the `pickleshare` library.",
+                stacklevel=2,
+            )
+            return default
+
+        def __setitem__(self, key, value):
+            warn(
+                f"using {key} requires you to install the `pickleshare` library.",
+                stacklevel=2,
+            )
+
+
 from tempfile import TemporaryDirectory
 from traitlets import (
     Any,
diff --git a/setup.cfg b/setup.cfg
@@ -36,7 +36,6 @@ install_requires =
     jedi>=0.16
     matplotlib-inline
     pexpect>4.3; sys_platform != "win32"
-    pickleshare
     prompt_toolkit>=3.0.30,<3.1.0,!=3.0.37
     pygments>=2.4.0
     stack_data
@@ -76,6 +75,7 @@ test =
     pytest<7.1
     pytest-asyncio
     testpath
+    pickleshare
 test_extra =
     %(test)s
     curio
