From 397b33c6cfb91bba92e52358de3edee47f58b22a 2023-12-07 19:40:42
From: Chris Hamill <chamill@ets.org>
Date: 2023-12-07 19:40:42
Subject: [PATCH] Add line numbers to default prompt.

---

diff --git a/IPython/terminal/interactiveshell.py b/IPython/terminal/interactiveshell.py
index 997fd82..4a063d4 100644
--- a/IPython/terminal/interactiveshell.py
+++ b/IPython/terminal/interactiveshell.py
@@ -753,7 +753,7 @@ class TerminalInteractiveShell(InteractiveShell):
             "message": get_message,
             "prompt_continuation": (
                 lambda width, lineno, is_soft_wrap: PygmentsTokens(
-                    self.prompts.continuation_prompt_tokens(width)
+                    self.prompts.continuation_prompt_tokens(width, lineno=lineno)
                 )
             ),
             "multiline": True,
diff --git a/IPython/terminal/prompts.py b/IPython/terminal/prompts.py
index 3f5c07b..8a1176f 100644
--- a/IPython/terminal/prompts.py
+++ b/IPython/terminal/prompts.py
@@ -28,8 +28,9 @@ class Prompts(object):
 
     def in_prompt_tokens(self):
         return [
-            (Token.Prompt, self.vi_mode() ),
-            (Token.Prompt, 'In ['),
+            (Token.Prompt, self.vi_mode()),
+            (Token.Prompt, "1 | "),
+            (Token.Prompt, "In ["),
             (Token.PromptNum, str(self.shell.execution_count)),
             (Token.Prompt, ']: '),
         ]
@@ -37,11 +38,15 @@ class Prompts(object):
     def _width(self):
         return fragment_list_width(self.in_prompt_tokens())
 
-    def continuation_prompt_tokens(self, width=None):
+    def continuation_prompt_tokens(self, width=None, *, lineno=None):
         if width is None:
             width = self._width()
+        prefix = " " * len(self.vi_mode()) + str(lineno + 1) + " | "
         return [
-            (Token.Prompt, (' ' * (width - 5)) + '...: '),
+            (
+                Token.Prompt,
+                prefix + (" " * (width - len(prefix) - 5)) + "...: ",
+            ),
         ]
 
     def rewrite_prompt_tokens(self):