diff options
Diffstat (limited to 'Lib/fractions.py')
| -rw-r--r-- | Lib/fractions.py | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/Lib/fractions.py b/Lib/fractions.py index 5ddc84c1a5..60b0728807 100644 --- a/Lib/fractions.py +++ b/Lib/fractions.py @@ -20,6 +20,17 @@ def gcd(a, b): Unless b==0, the result will have the same sign as b (so that when b is divided by it, the result comes out positive). """ + import warnings + warnings.warn('fractions.gcd() is deprecated. Use math.gcd() instead.', + DeprecationWarning, 2) + if type(a) is int is type(b): + if (b or a) < 0: + return -math.gcd(a, b) + return math.gcd(a, b) + return _gcd(a, b) + +def _gcd(a, b): + # Supports non-integers for backward compatibility. while b: a, b = b, a%b return a @@ -159,7 +170,7 @@ class Fraction(numbers.Rational): "or a Rational instance") elif type(numerator) is int is type(denominator): - pass # *very* normal case + pass # *very* normal case elif (isinstance(numerator, numbers.Rational) and isinstance(denominator, numbers.Rational)): @@ -174,7 +185,13 @@ class Fraction(numbers.Rational): if denominator == 0: raise ZeroDivisionError('Fraction(%s, 0)' % numerator) if _normalize: - g = gcd(numerator, denominator) + if type(numerator) is int is type(denominator): + # *very* normal case + g = math.gcd(numerator, denominator) + if denominator < 0: + g = -g + else: + g = _gcd(numerator, denominator) numerator //= g denominator //= g self._numerator = numerator |