Adjust signature of _from_pair() and add docstring

skirpichev · Feb 11, 2023 · 3625d34 · 3625d34
1 parent 836d3a6
commit 3625d34
Showing 1 changed file with 8 additions and 3 deletions.
diff --git a/Lib/fractions.py b/Lib/fractions.py
@@ -315,10 +315,15 @@ def from_decimal(cls, dec):
         return cls(*dec.as_integer_ratio())
 
     @classmethod
-    def _from_pair(cls, num, den):
+    def _from_pair(cls, numerator, denominator, /):
+        """Convert a pair of int's to a rational number.
+
+        The ratio of integers should be in lowest terms and
+        the denominator is positive.
+        """
         obj = super(Fraction, cls).__new__(cls)
-        obj._numerator = num
-        obj._denominator = den
+        obj._numerator = numerator
+        obj._denominator = denominator
         return obj
 
     def is_integer(self):