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mo/util_format.py

@@ -15,6 +15,15 @@ def inflect_number(n: int, w1: str, w234: str, wother: str, unitprefix: str = ''
         return f'{n} {unitprefix}{wother}'
 
 
+def inflect_by_number(n: int, w1: str, w234: str, wother: str, unitprefix: str = '') -> str:
+    if n == 1:
+        return f'{unitprefix}{w1}'
+    elif 2 <= n <= 4:
+        return f'{unitprefix}{w234}'
+    else:
+        return f'{unitprefix}{wother}'
+
+
 def timeformat(dt: datetime) -> str:
     if dt is None:
         return '–'
@@ -83,4 +92,6 @@ def timedelta(d: datetime, ref: Optional[datetime] = None, descriptive: bool = F
 
 
 def time_and_timedelta(d: datetime, ref: Optional[datetime] = None):
+    if d is None:
+        return '–'
     return f"{timeformat(d)} ({timedelta(d, ref)})"