dimensionless

hgrecco · Jun 11, 2024 · 25298f3 · 25298f3
1 parent 9972e60
commit 25298f3
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Showing 2 changed files with 12 additions and 1 deletion.
diff --git a/pint/delegates/formatter/_format_helpers.py b/pint/delegates/formatter/_format_helpers.py
@@ -211,7 +211,7 @@ def formatter(
             neg_terms.append(power_fmt.format(key, fun(value)))
 
     if not pos_terms and not neg_terms:
-        return ""
+        return "dimensionless"
 
     if not as_ratio:
         # Show as Product: positive * negative terms ** -1

diff --git a/pint/testsuite/test_issues.py b/pint/testsuite/test_issues.py
@@ -1255,3 +1255,14 @@ def test_issue1949(registry_empty):
 def test_issue1772(given, expected):
     ureg = UnitRegistry(non_int_type=decimal.Decimal)
     assert f"{ureg(given):Lx}" == expected
+
+
+def test_issue2007():
+    ureg = UnitRegistry()
+    q = ureg.Quantity(1, "")
+    assert f"{q:P}" == '1 dimensionless'
+    assert f"{q:C}" == '1 dimensionless'
+    assert f"{q:D}" == '1 dimensionless'
+    assert f"{q:H}" == '1 dimensionless'
+    assert f"{q:L}" == '1\\ dimensionless'
+    assert f"{q:Lx}" == '\\SI[]{1}{}'