From 8119529dcd8b6e3847156f4ba307f64c620b1bdc Mon Sep 17 00:00:00 2001
From: Mateeh Ullah <mateehullah89@gmail.com>
Date: Sat, 31 Oct 2026 19:55:20 +0500
Subject: [PATCH 1/2] fix(parser): preserve unquoted hash characters in CLI
 arguments

---
 fire/parser.py | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/fire/parser.py b/fire/parser.py
index a335cc2c..572a81e9 100644
--- a/fire/parser.py
+++ b/fire/parser.py
@@ -16,7 +16,9 @@
 
 import argparse
 import ast
+import io
 import sys
+import tokenize
 
 if sys.version_info[0:2] < (3, 8):
   _StrNode = ast.Str  # type: ignore  # pylint: disable=no-member  # deprecated but needed for Python < 3.8
@@ -68,7 +70,17 @@ def DefaultParseValue(value):
   Returns:
     The parsed value, of the type determined most appropriate.
   """
-  # Note: _LiteralEval will treat '#' as the start of a comment.
+  # Keep unquoted hash characters intact rather than letting Python's AST
+  # parser silently drop a trailing comment from command-line arguments.
+  # Quoted hashes remain valid parts of Python literals.
+  if '#' in value:
+    try:
+      tokens = tokenize.generate_tokens(io.StringIO(value).readline)
+      if any(token.type == tokenize.COMMENT for token in tokens):
+        return value
+    except tokenize.TokenError:
+      # Let the existing literal parser handle incomplete expressions.
+      pass
   try:
     return _LiteralEval(value)
   except (SyntaxError, ValueError):

From 8baeaff8dc7af2211d1d0d496ffe6b9ee982eaab Mon Sep 17 00:00:00 2001
From: Mateeh Ullah <mateehullah89@gmail.com>
Date: Sat, 31 Oct 2026 19:55:22 +0500
Subject: [PATCH 2/2] fix(parser): preserve unquoted hash characters in CLI
 arguments

---
 fire/parser_test.py | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/fire/parser_test.py b/fire/parser_test.py
index a404eea2..5b1a4589 100644
--- a/fire/parser_test.py
+++ b/fire/parser_test.py
@@ -119,8 +119,15 @@ def testDefaultParseValueNestedContainers(self):
 
   def testDefaultParseValueComments(self):
     self.assertEqual(parser.DefaultParseValue('"0#comments"'), '0#comments')
-    # Comments are stripped. This behavior may change in the future.
-    self.assertEqual(parser.DefaultParseValue('0#comments'), 0)
+    self.assertEqual(parser.DefaultParseValue('0#comments'), '0#comments')
+    self.assertEqual(parser.DefaultParseValue('qgm#123'), 'qgm#123')
+    self.assertEqual(parser.DefaultParseValue('#literal'), '#literal')
+    self.assertEqual(parser.DefaultParseValue('a#b#c'), 'a#b#c')
+
+  def testDefaultParseValueQuotedHashesInContainers(self):
+    self.assertEqual(parser.DefaultParseValue('["a#b", 2]'), ['a#b', 2])
+    self.assertEqual(parser.DefaultParseValue('{"key": "a#b"}'),
+                     {'key': 'a#b'})
 
   def testDefaultParseValueBadLiteral(self):
     # If it can't be parsed, we treat it as a string. This behavior may change.