BUG: fix data table alignment when emojis are present (pandas-dev#58098)

Author: madhuramkumar

pandas/io/formats/format.py

@@ -1713,6 +1713,16 @@ def _make_fixed_width(
     if len(strings) == 0 or justify == "all":
         return strings
 
+    # regex to identify emojis
+    emoji_pattern = re.compile(
+        r"[\U0001F600-\U0001F64F]|[\U0001F300-\U0001F5FF]|[\U0001F680-\U0001F6FF]|[\U0001F780-\U0001F7FF]",
+        flags=re.UNICODE,
+    )
+
+    emoji_count = sum(len(emoji_pattern.findall(s)) for s in strings)
+    if emoji_count > 0:
+        set_option("display.unicode.east_asian_width", True)
+
     if adj is None:
         adjustment = printing.get_adjustment()
     else:

pandas/tests/io/formats/test_format.py

@@ -1321,6 +1321,50 @@ def test_max_rows_fitted(self, length, min_rows, max_rows, expected):
         result = formatter.max_rows_fitted
         assert result == expected
 
+    def test_display_settings_with_emojis(self):
+        # Define the data for DataFrame
+        example = {
+            "normal_col": [1, 2, 3],
+            "text_col": ["hello world"] * 3,
+            "emoji_col_A": ["🟩 hello world"] * 3,
+            "emoji_col_B": ["🟥 hello world"] * 3,
+        }
+        # Create DataFrame
+        df = DataFrame(example)
+        output = repr(df)
+        expected_output = """   normal_col     text_col    emoji_col_A    emoji_col_B
+0           1  hello world  🟩 hello world  🟥 hello world
+1           2  hello world  🟩 hello world  🟥 hello world
+2           3  hello world  🟩 hello world  🟥 hello world"""
+
+        assert output == expected_output
+
+        # Reset options to defaults
+        reset_option("display.max_rows")
+        reset_option("display.max_columns")
+        reset_option("display.width")
+
+        example2 = {
+            "normal_col": [1, 2, 3],
+            "text_col": ["hello world"] * 3,
+            "emoji_col_A": ["🙏🙏 hello world"] * 3,
+        }
+        # Create DataFrame
+        df = DataFrame(example2)
+        output = repr(df)
+        expected_output2 = """   normal_col     text_col       emoji_col_A
+0           1  hello world  🙏🙏 hello world
+1           2  hello world  🙏🙏 hello world
+2           3  hello world  🙏🙏 hello world"""
+        # Check if the actual output matches expected output
+        assert output == expected_output2
+
+        # Reset options to defaults
+        reset_option("display.max_rows")
+        reset_option("display.max_columns")
+        reset_option("display.width")
+        reset_option("display.unicode.east_asian_width")
+
 
 def gen_series_formatting():
     s1 = Series(["a"] * 100)